Demco Butterfly Valves Brochure

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DEMCO Butterfly Valves
Quality design and rugged dependability in meeting the rigorous requirements of
industrial, oilfield and drilling applications

Table of Contents

DEMCO BUTTERFLY VALVES
Introduction...........................................................................................

2

Features and Benefits ............................................................................

3

Styles and Accessories............................................................................

6

Series NE-C, NE-I, NE-D, NEI-T................................................................

9

Series NF-C............................................................................................ 10
Base Part Numbers and Weights............................................................ 12
Marine Series......................................................................................... 13
Component Parts List............................................................................. 14
Dimensional Data (Valves)...................................................................... 16
Handles................................................................................................. 22
Worm Gear Operators........................................................................... 23
Stem Extensions..................................................................................... 25
General Technical Information................................................................ 26
Torque Data........................................................................................... 31
Standard Material Data.......................................................................... 32
Material Selection Guide........................................................................ 33
Services for Valves and Actuation........................................................... 39
Trademark Information.......................................................................... 40

1

DEMCO Butterfly Valves

Oklahoma City,
Okla., USA

Cameron is a leading provider of valves, valve automation, and measurement
systems to the oil and gas industry. Our products are primarily used to control, direct
and measure the flow of oil and gas as it is moved to refineries, petrochemical
plants, and industrial centers for processing.
We provide valve products that are sold through distributor networks worldwide for
use in both oil and gas and industrial applications and include such widely
recognized brands as DEMCO®, NAVCO®, NEWCO®, NUTRON®, THORNHILL
CRAVER®, TECHNO™, TOM WHEATLEY®, WHEATLEY®, and WKM®.
Cameron’s DEMCO butterfly valves are the valves of choice, engineered and proven
for drilling and production industries. Designed for dependable, heavy-duty
performance in abrasive and corrosive service conditions, DEMCO butterfly valves are
commonly selected for a number of oilfield applications.

2

FEATURES AND BENEFITS
As one of the most durable resilient-seated butterfly valves in
the industry, Cameron’s DEMCO butterfly valve excels in a
variety of applications.
Cast in both wafer and tapped lug patterns in a variety of
material choices, DEMCO butterfly valves feature a one-piece
body for reduced weight and increased strength.

Bi-Directional Sealing
Cameron’s DEMCO butterfly valve provides bi-directional
sealing at full-rated pressure with identical flow from either
direction.

Integral Flange Seal

The unique stem hole design in the disc ensures the dry stem
journal, and the hard-backed seat allows ease of installation,
reliable operation and in-field repairability without special
tools. DEMCO butterfly valves are available in sizes 2” to 36”
(50 mm to 900 mm).

An integral flange seal molded into the edge of the seat
accommodates ASME weld neck, slip-on, threaded, socket
and stub end type C flanges.

Engineered for long-term, reduced-maintenance
performance, DEMCO butterfly valves are commonly
selected for a variety of applications in the following
industries:

With a body rating of ASME Class 150 (285 psi non-shock),
the wafer body diameters are designed to self-center in the
ASME Class 150 flange pattern.

• Chemical and petrochemical

ASME Class 150 Rating

Flatted Double D
Upper Stem

• Agriculture

Large Flange Top for
Ease of Power
Automation

• Oil and gas drilling and production
• Food and beverage
• Water and waste water
• Cooling towers (HVAC)
Bronze Bearings

• Power

Positive Stem Retention
for Blowout-Proof
Stems
MSS-SP-25 Marking is
Standard

• Mining and materials
• Dry bulk handling

Triple Stem Seal

• Marine and government

High-Flow Disc
Positively Oriented Disc

Hard-Backed Cartridge Seat

One-Piece Body

Wafer Style Shown

3

FEATURES AND BENEFITS (CONT.)
Multiple Pressure Ratings
Three drop-tight pressure ratings are offered for 2” to 12” (50 mm to 300 mm) sizes. The standard shut-off pressure rating is
200 psi, but 285 and 50 psi shut-off ratings are also available. A throttling 0 psi-rated valve is available where drop-tight closure
is not required and minimal torque is desired. Both the 50 psi and throttling ratings allow for smaller actuators, which can
significantly reduce overall installation cost in automated applications. The 14” to 36” (350 mm to 900 mm) size valves are
available in 150 and 50 psi drop-tight shut-off ratings, as well as throttling.

Hard-Backed
Seat

A
A. Dry Stem Journal Reduces Potential for
Leakage
The DEMCO valve’s disc is uniquely designed with a
continuous annular-raised band around the stem hole and
disc edge, which presses into the seat flat at every angular
position.
The resilient seat presses back with a higher force than the
line pressure, preventing leakage to the stem. In addition,
two O-ring ribs are provided in the seat stem bore, creating a
triple stem seal. In competitive stem seal designs with boot
seats, a seal is accomplished by an interference squeezing on
the stem or an O-ring in the stem journal. The potential for
leakage behind the seat is high for this competitive design.
As the disc wipes the seat, elongation of the stem seal area
allows leakage to collect behind the seat. This condition is
reduced by the DEMCO valve’s dry stem journal and hardbacked seat.

4

B
B. Hard-Backed Cartridge Seat
The DEMCO valve’s cartridge seat is constructed by
permanently bonding a resilient elastomer to a rigid backing
ring. In addition to superior sealing integrity, this design:
•	Makes valve installation easier because no special
precautions are required for disc position. This is
especially advantageous when installing valves with
fail-closed actuators.
•	Reduces high torque and premature failure caused by
elastomer distortion, as found in other non-rigid seat
designs.
•	Simplifies seat replacement because the seat is slip-fitted
into the body with no need for special tools.

SPECIFICATIONS
Disc

Sizes
2” to 36” (50 mm to 900 mm)

Body Type and Style Designations

C

Stem

Long-Neck NE-C and NF-C: 2” to 36” (50 mm to
900 mm) wafer/lug, 36” (900 mm)
Short-Neck NE-I and NE-I Sanitary: 2” to 12“ (50
mm to 300 mm) wafer/lug

C. Positively Oriented Disc
The rectangular drive ensures the proper orientation of the
stem disc connection. In 2” to 24” (50 mm to 600 mm) size
valves, the disc is permitted to float on the stem to center in
the valve seat. This design enhances drop-tight sealing and
prolongs service life.

NE-IT Teflon: 2” to 10” (50 mm to 250 mm)
wafer/lug
NE-D: 2” to 12” (50 mm to 300 mm) wafer
Marine: 2” to 24” (50 mm to 600 mm) wafer/lug

Pressure Rating
2“ to 12” (50 mm to 300 mm):
0 (throttling); 50, 200 and 285 psi
NEI-T: 2” to 10” (50 mm to 250 mm): 150 psi
14” to 36” (350 mm to 900 mm): 0, 50 and 150 psi

D

Upstream

Disc

D. End-of-Line Service
Lug body valves may be used in end-of-line service with
downstream piping removed. Only weld-neck or socket
flanges can be used for this service. Since upstream pressure
is excluded between the flange and the seat face by the
DEMCO flange seal design, there is no effective force to slide
the seat downstream. DEMCO 2” to 12” (50 mm to 300
mm) lug butterfly valves are suitable for liquid service up to
200 psi with downstream piping removed at 150 psi for 14”
to 36” (350 mm to 900 mm) valves.
Lug body valves are recommended for isolation of pumps,
control devices or other system components, which may
need to be removed for repair or replacement. Lug valves
also are suitable for installation at points from which piping
expansion may proceed. Such valves normally are blanked
with blind flanges to protect the exposed seats until new
piping is attached.

Operating Temperatures
-30º F to 300º F (-34º C to 204º C), depending on
seat material selection and application (see page 32)

Standard Material Options
Bodies: Iron, steel, stainless steel and bronze
Discs: Nickel-plated ductile iron, bronze and stainless
steel
Stems: 416 and 316 stainless steel
Seats: Buna-N, EPDM, FKM and Neoprene
*Many more options available (consult Cameron or
see pages 9, 10 and 11 on how to order).

5

STYLES AND ACCESSORIES
The DEMCO butterfly valve comes in a variety of styles to suit a range of applications. In addition, a variety of quality accessories
are available to further enhance its suitability to the application.

Series NE-C
Sizes 2” to 12” (50 mm to 300 mm) are available in both
wafer and lug styles. This series is a general purpose valve
with a neck length designed to provide full clearance for the
valve top over 2” of insulation on ASME Class 150 pipe
flanges.

Series NE-I
Sizes 2” to 12” (50 mm to 300 mm) are suited for a range
of applications in many industries, including food and
beverage utilities and process flowlines. This short neck
design is offered in a variety of body materials. The valves
are designed for installation between ASME Class 125 and
150 flanges.

Series NE-D
The valves in this series can be made in sizes 2” to 12” (50
mm to 300 mm). The Series NE-D valve is a short-neck valve
with body notches to fit popular, lightweight flange
patterns, making it ideal for both the bulk material handling
and the transportation industries. Valves also will center in
ASME Class 125 and 150 flanges.

Series NF-C
Sizes 14” to 36” (350 mm to 900 mm) are available in both
wafer and lug styles. The wafer body has two drilled locator
lugs at the top and bottom for ASME Class 150 flanges.
Bronze bearings are installed on both stems for reduced
operating torque.

6

Series NE-I Sanitary

Sanitary Features

This series comes in sizes 2” to 12” (50 mm to 300 mm). It
is similar to the Series NE-I valve, but is exclusively designed
to meet the rigorous requirements of sanitary service in the
food and beverage industry. The body is available in bronze,
stainless steel, aluminum or electroless nickel-coated ductile
iron.

Series NEI-T Teflon

FDA-approved materials are used for all wetted parts.
Handle parts are bronze and stainless steel, permitting
caustic washdown.

Other benefits:
•	The DEMCO dry journal stem seal system ensures sanitary
butterfly valve construction.
•	Drilled passageways, a design originated by the DEMCO
brand, vent the entire interior of the disc. No closed
chamber is provided for the culture of undesirable
organisms.
•	Discs are produced from smooth and non-porous
investment castings. Stem bosses are reduced for
increased flow.

Because of the inert, aseptic, non-stick character of Teflon®,
the DEMCO NEI-T Teflon-lined butterfly valve is ideal for
clean lines in food and beverage plants. The Teflon seat
consists of a virgin Teflon liner overlaid and bonded to an
elastomer EPDM cushion, which provides resilience for
sealing. The Teflon liner extends over the seat faces,
completely covering and sealing the resilient material from
contact with line fluids.

Marine
 EMCO marine butterfly valves are available in the NE-C lug,
D
NE-I lug and wafer, and NE-D wafer styles, and conform to:
• Title 46 of the Code of Federal Regulations
•	Part 56 of the US Coast Guard’s Marine Engineering
Regulations
•	The American Bureau of Shipping Standard, including
tagging per MSS-SP-25 and testing per MSS-SP-67

•	The mating flange contacts and compresses the
projecting inner surface of the resilient seat to form a
smooth and uninterrupted flow way. This positive seal
between the innermost contact of the seat and flange
ensures aseptic conditions after a piping flush.

Stem Seal

Vented
Design
High-Flow
Discs

Trap-Free
Flow Way

7

STYLES AND ACCESSORIES (CONT.)
A. DEMCO NE-C Wafer

A. Actuators
Consult Cameron or visit www.c-a-m.com/valveautomation
for actuation options.

B. Handles and Stem Extensions
There are three basic handle designs that are compatible
with any 2” to 12” (50 mm to 300 mm) valve: ten-position
locking, two-position locking and memory stop. Memorystop handles provide throttling, which is infinitely adjustable
and can be set by a lock nut with a memory-stop setting
(adjustable open stop). Handles are available in basic trim,
corrosion-resistant trim and sanitary trim. Stem extensions
are fabricated from carbon steel parts and contained in a
tubular housing. Gaskets and O-rings seal the stem
extension at the top and bottom. These extensions are
fabricated to specified lengths.

B. Stem Extension with
Handle on Series NE-I
Butterfly Valve

C. Gear-Operated

C. Gear Operators
DEMCO weatherproof gear operators are offered with a
choice of handwheel, chainwheel or square nuts. The worm
gear has either self-locking set screws to control open and
closed positioning or an optional adjustable memory-stop
for balance return to a preset open position after closing.

8

SERIES NE-C, NE-I, NE-D, NEI-T
2” to 12” (50 mm to 300 mm)

1

Key No.

Qty.

Description

Material

1

1

Body

*

2

1

Seat

*

3

1

Disc

*

4

1

Upper Stem

*

6

1

Lower Stem

*

7

2

Spring Pin

Stainless Steel

14

1

Retainer

Stainless Steel

22

1

Top O-ring

Buna-N

23

•

Stem O-ring

Buna-N

24

2

Bearing

Bronze

1

22
24
1

4
1

7
14
24

Series NE-D
Wafer
Series NE-I
Lug
Series NE-I
Wafer

1
23
2
3

Series NE-C
Lug

6

* See How to Order for material choices/styles.
Complete material specs on page 32.
• Four required for throttling valves only.

HOW TO ORDER
XXXXX
Base Part Number

-

NE-C/NE-I/NEI-T
Wafer

1

Lug

5

NE-D
Wafer

Based on
valve series
and shut-off
pressure.
See page 12.

1

X
Body
Configuration

7

23

Series NE-C
Wafer

X
Body Material*

NE-C (Long-Neck)
Ductile Iron (Lug)
Cast Iron (Wafer)
NE-I and NE-I Sanitary
Ductile Iron (NE-I, Wafer Only)
Aluminum Bronze
Carbon Steel (NE-I Only)
Aluminum (NE-I, Wafer Only)
ENC-Coated Ductile Iron
Stainless Steel
NE-D
Ductile Iron
NEI-T
Ductile Iron
Wafer – Short-Neck
Lug – Long-Neck
Gray Iron (Long-Neck Wafer)
Aluminum Bronze
Carbon Steel
Aluminum (Wafer Only)
Stainless Steel

1
2

X
Stem
Material

NE-C, NE-I
and NE-D
416 SS

1

316 SS**

2

Monel6

3

1
3
4
5
6
8

NEI-T
316 SS
Vented***

2

1

316 SS
Solid***

9

NEI-Sanitary
1
2
3
4
5
8

316 SS***

2

X
Disc
Material

NE-C, NE-I and NE-D
316 SS
2
Monel6
3
Aluminum
4
Bronze
Ductile Iron,
5
Nickel-Plated
PVF-Coated
6
Ductile Iron1
2
Alloy 20
7
Hastelloy “C”6
8
NEI-T and
NE-I Sanitary
316 SS Polished3
2
316 SS Tumbled3
5
Alloy 20
7
(NEI-T Only)
6
Hastelloy “C”
8
(NEI-T Only)
316 SS Unpolished3
9

XX

X

Seat Elastomer

Actuation

NE-C, NE-I and NE-D7
Buna-N
Black Neoprene
Hypalon6
FKM
Peroxide-Cured, EPDM
Natural Rubber
White Neoprene
ETM-30230
Fluorosteam
Peroxide-Cured
Food Grade, EPDM
Peroxide-Cured, Buna-N
Sulfur-Cured
Food Grade, EPDM
NEI-T
Peroxide-Cured, EPDM/Teflon6
Sulfur-Cured, EPDM/Teflon6
NE-I Sanitary
All Seats Food Grade
Black Neoprene
FKM
EPDM
White Neoprene
Sulfur-Cured, EPDM

31
32
33
34
35
36
37
01
02
03
04
05
35
05

32
34
35
37
05

Handle
10 Position Lkg.
Throttling Mem./
Stop
Square Nut
2-Position Lkg.
10-Position Sanitary
(NEI-T Only)
None
10-Position Lkg.
Corrosion-Resistant
2-Position Lkg.
Corrosion-Resistant
Throttling Mem./
Stop CorrosionResistant
Gear Operators5
Handwheel
Crank 2” to 12” (50
mm to 300 mm)
Chainwheel
Square Nut
Bare Shaft

14
24
5
64
8
9
K
L
M

A
B
C
D
E

(Example: 6” (150 mm) NE-C, 200 psi, Wafer, Standard Trim
with Handle – 22124-1215311)
*
Standard coating is green enamel; other coatings are available on request.
** 17-4 PH SS for 8” to 12” (200 mm to 300 mm) upper stem only.
*** Except 17-4 PH upper 8” and 10” (200 mm and 250 mm).
1
200 psi only.
2
Except 285 psi.
3	Polished – ground to #4 dairy finish; tumbled – vibratory finish to remove as cast surface; unpolished – as cast surface.
4	When these options are used with NE-I sanitary butterfly valves, handles will be bronze with stainless steel (SS) parts and fasteners.
5
Gear operator recommended for 8” to 12” (200 mm to 300 mm) sizes in all series.
6
See material trademark note on page 40.
7
Other seat options available (consult Cameron).

9

SERIES NF-C
14” to 24” (350 mm to 600 mm)
24

Key No.

Qty.

Description

Material

1

1

Body

*

2

1

Seat

*

3

1

Disc

*

4

1

Upper Stem

*

6

1

Lower Stem

*

14
24

7

2

Spring Pin

Stainless Steel

14

1

Retainer (Spacer) +

Stainless Steel

22

1

Top O-ring

Buna-N

23

•

Stem O-ring

Buna-N

24

2

Bearing

Bronze

4
7

23

* See How to Order for material choices/styles.
Complete material specs are on page 32.
• Four required for throttling valves only.
+ 14” to 20” (350 mm to 500 mm) spacer.

23

1

1

6
2
7
23

23
25

3

HOW TO ORDER
XXXXX
Base Part Number

Wafer

1

Lug

5

Based on
valve series
and shut-off
pressure.
See page 12.

-

X
Body
Configuration

Ductile Iron (Lug)
Cast Iron (Wafer)
Aluminum Bronze (Lug)
Steel (Lug)
Stainless Steel (Lug)

X

X
Stem
Material

Body Material*

1
2
3
4
8

416 SS

1

316 SS

2

Monel2

3

316 SS
Monel2
Aluminum
Bronze
Nickel-Plated Iron
PVF-Coated
Ductile Iron1

X
Disc
Material

2
3
4
5

XX

X

Seat Elastomer

Actuation

Buna-N
Black Neoprene
Hypalon6
FKM
EPDM

6

(Example: 18” (450 mm) NF-C, 150 psi Lug, SS Trim, Buna-N Seat, WGO – 23822-512231A)
*
1
2

10

Standard coating is green enamel; other coatings are available on request.
150 psi only.
See material trademark note on page 40.

31
32
33
34
35

None
Gear Operators
Handwheel
Chainwheel
Square Nut
Bare Shaft

9
A
C
D
E

SERIES NF-C
30“ and 36” (750 mm and 900 mm)

Key No.

*

Qty.

Description

Material
*

1

1

Body

2

1

Seat – Hard-Backed

*

3

1

Disc

*
*

4

1

Upper Stem

6

1

Lower Stem

*

7

2

Disc Screw

18-8 SS

8

1

Key

Stainless Steel
Buna-N

9

2

O-ring

14

1

Spacer

Steel

24

2

Upper Bearing

Bronze

25

1

Lower Bearing

Bronze

26

1

Thrust Collar

Bronze

27

1

Set Screw

18-8 SS

28

1

Cap

Ductile Iron

2

29

4

Screw

Carbon Steel

3

30

4

Lockwasher

Carbon Steel

24

4

14

1

24

8

See How to Order for material choices/styles.
Complete material specs on page 32.

7 9
6
25
27

26
28 29 30

HOW TO ORDER
XXXXX
Base Part Number

-

X
Body
Configuration

Wafer

1

Lug

5

X
Body Material*

Ductile Iron
(Wafer or Lug)

1

X
Stem
Material

416 SS

1

316 SS

2

Monel1

3

X
Disc
Material

316 SS
Monel1
Aluminum
Bronze
Ductile Iron, NickelPlated

2
3
4

XX

X

Seat Elastomer

Actuation

Buna-N
FKM
EPDM

31
34
35

Handwheel
Chainwheel
Square Nut
Bare Shaft

A
C
D
E

5

See page 12.

(Example: 36 “ (900 mm), 150 psi, Bronze Disc, EPDM Seat with Gear Op. – 24357-111435A)
*
1

Standard coating is green enamel; other coatings are available on request.
See material trademark note on page 40.

11

BASE PART NUMBERS AND WEIGHTS
Series NE-C, 2” to 12“ (50 mm to 300 mm)*
Description
200 psi
285 psi
50 psi
Throttling
Weight
(lb – bare stem)

in.
(mm)

2
(50)

2-1/2
(65)

3
(80)

4
(100)

5
(125)

6
(150)

8
(200)

10
(250)

12
(300)

Wafer
Lug

22119
22225
22234
22243
5.8
8.0

22120
22226
22235
22244
7.0
9.9

22121
22227
22236
22245
7.7
10.7

22122
22228
22237
22246
11.4
17.0

22123
22229
22238
22247
14.7
24.5

22124
22230
22239
22248
17.6
28.5

22125
22231
22240
22249
28.5
43.5

22126
22232
22241
22250
47.9
65.9

22127
22233
22242
22251
71.0
98.5

Series NE-I, 2” to 12“ (50 mm to 300 mm)*
Description
200 psi
285 psi
50 psi
Throttling
Weight
(lb – bare stem)
Wafer
(lb – bare stem)
Lug

in.
(mm)

2
(50)

2-1/2
(65)

3
(80)

4
(100)

5
(125)

6
(150)

8
(200)

10
(250)

12
(300)

Iron, Steel, SS
Bronze
Aluminum
Bronze
Steel, SS

22128
22252
22261
22270
4.9
4.7
2.8
6.8
7.0

22129
22253
22262
22271
6.4
6.2
3.4
8.7
8.9

22130
22254
22263
22272
6.9
6.7
4.1
9.5
9.7

22131
22255
22264
22273
10.2
9.9
5.9
15.7
16.0

22132
22256
22265
22274
13.7
13.4
8.7
23.1
23.5

22133
22257
22266
22275
16.4
16.0
10.8
27.0
27.5

22134
22258
22267
22276
28.4
28.0
18.2
42.0
42.5

22135
22259
22268
22277
44.8
44.3
30.4
64.4
64.9

22136
22260
22269
22278
66.8
66.3
47.2
96.8
97.5

Series NE-I, Sanitary 2” to 12“ (50 mm to 300 mm)*
Description

in.
(mm)

200 psi
Weight

2
(50)

2-1/2
(65)

3
(80)

4
(100)

6
(150)

8
(200)

10
(250)

12
(300)

23150

23151

23152
23153
23154
23155
See chart above: NE-I, 2” to 12” (50 mm to 300 mm)

23156

23157

Series NE-D, 2” to 12“ (50 mm to 300 mm)*
Description

in.
(mm)

200 psi
285 psi
50 psi
Throttling
Weight (lb – bare stem) Wafer

2
(50)

2-1/2
(65)

3
(80)

4
(100)

5
(125)

6
(150)

8
(200)

10
(250)

12
(300)

22181
22279
22285
22291
4.9

22129
22253
22262
22271
6.4

25093
25135
25132
25136
6.9

22183
22281
22287
22293
10.2

22184
22282
22288
22294
13.7

22185
22283
22289
22295
16.4

22134
22258
22267
22276
28.4

22186
22284
22290
22296
44.8

22136
22260
22269
22278
66.8

Series NEI-T, 2” to 10“ (50 mm to 250 mm)*
Description
150 psi
Weight
(lb – bare stem)
Wafer**
(lb – bare stem)
Lug**

in.
(mm)

2
(50)

2-1/2
(65)

3
(80)

4
(100)

6
(150)

8
(200)

10
(250)

Iron, Steel, SS
Bronze
Aluminum
Bronze
Steel, SS

24680
4.9
4.7
2.8
6.8
7.0

24681
6.4
6.2
3.4
8.7
8.9

24682
6.9
6.7
4.1
9.5
9.7

24683
10.2
9.9
5.9
15.7
16.0

24684
16.4
16.0
10.8
27.0
27.5

24685
28.4
28.0
18.2
42.0
42.5

24686
44.8
44.3
30.4
64.4
64.9

* Gear operator recommended for 8” to 12” (200 mm to 300 mm) sizes.
** See NE-C chart above for weights of long-neck wafer and lug valves.

Series NF-C, 14” to 24“ (350 mm to 600 mm)
Description
150 psi
50 psi
Throttling
Weight
(lb – bare stem)

14
(350)

16
(400)

18
(450)

20
(500)

24
(600)

Wafer
Lug

23820
24440
24445
102
116

23821
24441
24446
166
203

23822
24442
24447
214
239

23823
24443
24448
257
332

23824
24444
24449
401
535

Marine valves: consult Cameron for data sheets B-255, B-256 and B-258.

12

Series NF-C, 30” to 36“ (750 mm to 900 mm)

in.
(mm)

Description
150 psi
50 psi
Weight

in.
(mm)

30
(750)

36
(900)

Wafer
Lug

24141
24924
935
1050

24357
25061
1500
2020

MARINE SERIES
DEMCO marine butterfly valves meet all the requirements of US Coast Guard’s Marine Engineering Regulations as outlined in
Title 46 of the Code of Federal Regulations, Part 56 and The American Bureau of Shipping Standard, including tagging per
MSS-SP-25 and testing per MSS-SP-67. All valves are shell tested at 1-1/2 times rated working pressure and seat tested at rated
working pressure.

Marine Series, 2” to 36“ (50 mm to 900 mm)
Description

in.
(mm)

200 psi
50 psi
285 psi
Weight
(lb – bare stem)
NE-C Long-Neck Body
Wafer
Gray Iron
Lug
Ductile Iron
NE-I Short-Neck Body
Wafer
Iron, Steel, SS
Bronze
Lug
Bronze
SS, Steel

Description

in.
(mm)

150 psi
50 psi
Weight
(lb – bare stem)
NF-C Long-Neck Body
Lug
Ductile Iron
Bronze

2
(50)

2-1/2
(65)

3
(80)

4
(100)

5
(125)

6
(150)

8
(200)

10
(250)

12
(300)

22923
22932
22914

22924
22933
22915

22925
22934
22916

22926
22935
22917

22927
22936
22918

22928
22937
22919

22929
22938
22920

22930
22939
22921

22931
22940
22922

5.8
8.0

7.0
9.9

7.7
10.7

11.4
17.0

14.7
24.5

17.6
28.5

28.5
43.5

47.9
65.9

71.0
98.5

4.9
4.7
6.8
7.0

6.4
6.2
8.7
8.9

6.9
6.7
9.5
9.7

10.2
9.9
15.7
16.0

13.7
13.4
23.1
23.5

16.4
16.0
27.0
27.5

28.4
28.0
42.0
42.5

44.8
44.3
64.4
64.9

66.8
66.3
96.8
97.5

14
(350)

16
(400)

18
(450)

20
(500)

24
(600)

30
(750)

36
(900)

24611
24653

24612
24654

24613
24655

24614
24656

24615
24657

2227182
2227184

2227183
2227185

116
113

203
199

239
235

332
325

535
525

1050
N/A

2020
N/A

HOW TO ORDER
XXXXX
Base Part Number

-

Wafer

1

Lug

5

X
Body
Configuration

Ductile Iron
Aluminum Bronze
Carbon Steel
Stainless Steel

X

X
Stem
Material

Body Material*

1
3
4
8

416 SS*

1

316 SS

2

Monel

3

1

Stainless Steel
Monel1
Aluminum
Bronze*

Base part no.
of valve
shown above.

X
Disc
Material

2
3
4

Buna-N*
Black Neoprene
Hypalon1
FKM
EPDM*
Natural Rubber
White Neoprene

XX
Seat
Material

31
32
33
34
35
36
37

X
Actuation

10-Position Handle
Throttling
Memory Stop
2-Position Locking
Worm Gear
Handwheel

1
2
6
A

(Example: 6” (150 mm) 200 psi Wafer, Standard Trim with 10-Position Handle – 22928-1114311)
*
**

Standard base trim options.
Wafer 2” to 12” (50 mm to 300 mm) only.
Lug 2” to 36” (50 mm to 900 mm).
Note: 30” and 36” (750 mm to 900 mm) available with ductile iron lug body only.
1

See material trademark note on page 40.

13

COMPONENT PARTS LIST:
SERIES NE-C, NE-I, NE-D

22
24
4
7

14
24
1

1

23

1

2
1
3
1
6
23

7

Parts List for Series NE-C, NE-I and NE-D (Consult a Cameron representative for replacement parts for Series NE, NE-S and NE-N.)
Key
Description
No.
1

2

3

4

6
7
14
22
23
24

1
2
3
4
5
6
7

14

Body

2”
(50 mm)

2-1/2”
(65 mm)

3”
(80 mm)

4”
(100 mm)

5”
(125 mm)

6”
(150 mm)

NE-C Wafer
Options

22137-012

22138-012

22139-012

22140-012

22141-012

22142-012

NE-C Lug
Options
NE-I Wafer
Options

21986-051

NE-I Lug
Options
NE-D Wafer
Options

22695-05x

Seat
Options
3” NE-D Seat (See Below 6)
Disc
200 psi
285 psi
50 psi
Throttling
Options
PVF-Coated, 200 psi
Upper Stem
NE-C
NE-I
NE-D
Upper Stem
NE-C
-Utility Top
NE-I
Lower Stem
Stem Material Options
Spring Pin (2)
302 SS
Retainer
Stainless Steel
Top O-ring
Buna-N
Stem O-ring5
Buna-N
Bearing (2)
Bronze

22681-01x

22187-021
1786-xxx

22045-0xx
22196-0xx
22205-0xx
22214-0xx
22714-001
22066-00x
22073-00x
22073-00x
22334-00x
22341-00x
22080-00x

5526-113
22526-001

8”
10”
12”
(200 mm) (250 mm) (300 mm)
22143-012

22144-012

22145-012

ASTM A48 Gray Iron -012
21989-051
21990-051
21991-051
21992-051
21993-051
21994-051
ASTM A395 Ductile Iron -051
22682-01x
22683-01x
22684-01x
22685-01x
22686-01x
22687-01x
22688-01x
22689-01x
ASTM A395 Ductile Iron -011, ASTM B148 Aluminum Bronze -013, ASTM A216 WCB Steel -014,
ASTM B179 Aluminum -015, DI/ENC -016, ASTM A351 SS -018
22696-05x
22697-05x
22698-05x
22699-05x
22700-05x
22701-05x
22702-05x
22703-05x
ASTM B148 Aluminum Bronze -053, ASTM A216 WCB Steel -054, ASTM A351 SS -058
22682-011
20594-021
22189-021
22190-021
22191-021
22687-011
22192-021
22689-011
ASTM A395 Ductile Iron -0x1
1788-xxx
1790-xxx6
1792-xxx
1794-xxx
1002-xxx
1798-xxx
1815-xxx
1817-xxx
Buna-N -031, Black Neoprene -032, Hypalon7 -033, FKM -034, EPDM1 -135, Natural Rubber -036
White Neoprene -037, Peroxide-Cured Buna-N -231, Fluorosteam -244, ETM-30230 -331
22046-0xx
22047-0xx
22048-0xx
22049-0xx
22050-0xx
22051-0xx
22052-0xx
22053-0xx
22197-0xx
22198-0xx
22199-0xx
22200-0xx
22201-0xx
22202-0xx
22203-0xx
22204-0xx
22206-0xx
22207-0xx
22208-0xx
22209-0xx
22210-0xx
22211-0xx
22212-0xx
22213-0xx
22215-0xx
22216-0xx
22217-0xx
22218-0xx
22219-0xx
22220-0xx
22221-0xx
22222-0xx
316 SS -002, Monel -003, Nickel-Plated Ductile Iron -005, Alloy 202 -007, Hastelloy C7 -008, Aluminum Bronze3 -014
22715-001
22716-001
22717-001
22718-001
22719-001
22720-001
22721-001
22722-001
22067-00x
22068-00x
22069-00x
22070-00x
22071-00x
22072-00x
22074-00x
22075-00x
22076-00x
22077-00x
22078-00x
22079-00x
22074-00x
22193-00x
22194-00x
22195-00x
22077-00x
22078-00x
22079-00x
22335-00x
22336-00x
22337-00x
22338-00x
22339-00x
22340-00x
22342-00x
22343-00x
22344-00x
22345-00x
22346-00x
22347-00x
22081-00x
22082-00x
22083-00x
22084-00x
22085-00x
22086-00x
416 SS -001, 316 SS4 -002, Monel7 -003
5448-18720
5448-18724
5448-25028
22117
13704
13705
13706
13707
5526-114
5526-115
5526-117
5526-119
5526-125
5526-115
5526-116
5526-212
5526-214
5526-220
22118-001
13112-001
13115-001
13116-001
13117-001
21987-051

21988-051

EPDM seat options: Standard – Peroxide-Cured -135, Food Grade -035 Peroxide-Cured, Sulfur-Cured -235.
Alloy 20 not available for 285 psi.
8” to 12” (200 mm to 300 mm), 285 psi Aluminum Bronze, use -024.
8” to 12” (200 mm to 300 mm), Upper Stem 17-4 PH SS (part number suffix -012), Lower Stem 316 SS.
Four required for throttling (0 psi) valves only.
3” (80 mm) NE-D seat part number 25095-xxx.
See material trademark note on page 40

COMPONENT PARTS LIST:
SERIES NF-C

24
4
7

14
24

23

23
3
1

1

6
2
7

23

23
25

Part List for Series NF-C, (Consult a Cameron representative for replacement parts for Series NF.)
Key
No.

Qty.

1

1

2

1

3

1

4
6
7
14
23
24
25

1
1
2
1
Note 1
2
1

Description
Body

Seat
Disc

1
2
3
4

Lug
Wafer

Upper Stem
Lower Stem
Spring Pin
Retainer (Spacer)2
Disc O-ring
Upper Bearing
Lower Bearing

150 psi
50 psi
Throttling
PVF-Coated

14”
(350 mm)

16”
(400 mm)

18”
(450 mm)

20”
(500 mm)

24”
(600 mm)

23827-051
23825-012

23911-051
23907-012

23901-051
23899-012

23891-051
23881-012

23875-051
23873-012

23829-03x

23913-03x

23903-03x

23893-03x

7103-03x

23830-0xx
24450-0xx
24455-0xx
24460-001
23833-00x
23834-00x
5446-25040
5502-137
5526-220
5086-044
5086-045

23915-0xx
24451-0xx
24456-0xx
24461-001
23917-00x
23918-00x
5446-25040
5502-150
5526-223
5086-050
5086-051

23905-0xx
24452-0xx
24457-0xx
24462-001
23897-00x
23898-00x
5446-25048
5502-175
5526-328
5086-048
5086-049

23895-0xx
24453-0xx
24458-0xx
24463-001
23897-00x
23898-00x
5446-25048
5502-175
5526-328
5086-048
5086-049

23877-0xx
24454-0xx
24459-0xx
24464-001
23879-00x
23880-00x
5446-25064
24470
5526-331
5086-046
5086-047

Material
Ductile Iron (Lug) -051
Cast Iron (Wafer) -012
Buna-N -031 Blk. Neoprene -032
Hypalon4 -033, FKM -034
EPDM3 -X35
316 SS -002 Monel4 -003
Aluminum Bronze -014
Nickel-Plated Iron -005
PVF-Coated Iron -001
416 SS -001, 316 SS -002
Monel4 -003
Stainless Steel
Steel
Buna-N
Bronze
Bronze

Four required for throttling valves only.
14” to 20” (350 mm to 500 mm) retainer, 24” (600 mm) spacer.
EPDM seat options: Standard – Peroxide-Cured -135, Food Grade -035 Peroxide-Cured, Sulfur-Cured -235.
See material trademark note on page 40.

15

SERIES NE-C DIMENSIONAL DATA
2” to 12” (50 mm to 300 mm)
F

S

H
G

R

R
N

N

P

P

C

C

D

A

E

Dimensional Data
Size in.
2
2-1/2
3
4
5
6
8
10
12

A

C

D

E

F

G

H

J

K

L

N

P

R

S

1.74
1.86
1.86
2.11
2.24
2.24
2.54
2.74
3.24

5.62
6.12
6.38
7.12
7.75
8.25
9.44
11.25
12.19

8.44
9.19
9.69
11.00
12.12
13.25
15.56
18.69
21.69

4.12
4.88
5.38
6.88
7.75
8.75
11.00
13.38
16.12

4.00
4.00
4.00
4.00
4.00
4.00
6.00
6.00
6.00

3.25
3.25
3.25
3.25
3.25
3.25
5.00
5.00
5.00

0.408
0.408
0.408
0.408
0.408
0.408
0.533
0.533
0.533

4.75
5.50
6.00
7.50
8.50
9.50
11.75
14.25
17.00

5/8 - 11
5/8 - 11
5/8 - 11
5/8 - 11
3/4 - 10
3/4 - 10
3/4 - 10
7/8 - 9
7/8 - 9

4
4
4
8
8
8
8
12
12

1.00
1.00
1.00
1.00
1.25
1.25
1.38
1.38
1.38

0.44
0.44
0.44
0.44
0.44
0.44
0.56
0.56
0.56

0.625
0.625
0.625
0.625
0.838
0.838
0.838
0.963
1.338

0.375
0.375
0.375
0.375
0.500
0.500
0.500
0.625
0.750

44
47
47
54
57
57
65
70
82

143
155
162
181
197
210
240
286
310

214
233
246
279
308
337
395
475
551

105
124
137
175
197
222
279
340
409

102
102
102
102
102
102
152
152
152

83
83
83
83
83
83
127
127
127

10.36
10.36
10.36
10.36
10.36
10.36
13.54
13.54
13.54

121
140
152
191
216
241
298
362
432

5/8 - 11
5/8 - 11
5/8 - 11
5/8 - 11
3/4 - 10
3/4 - 10
3/4 - 10
7/8 - 9
7/8 - 9

4
4
4
8
8
8
8
12
12

25
25
25
25
32
32
35
35
35

11.2
11.2
11.2
11.2
11.2
11.2
14.2
14.2
14.2

15.88
15.88
15.88
15.88
21.29
21.29
21.29
24.46
33.99

9.53
9.53
9.53
9.53
12.70
12.70
12.70
15.88
19.05

Size mm
50
65
80
100
125
150
200
250
300

Note: For general dimensions, see page 28.

16

SERIES NF-C DIMENSIONAL DATA
14” to 24” (350 mm to 600 mm)

H
G

S
R
N

M

P

T

C

D
U

B

A

E

Dimensional Data
Size in.

A

B

C

D

E

G

H

J

K

L

M

N

P

R

S

T

U

14

3.00

10.63

12.75

23.4

5.00

0.56

18.75

2.00

2.25

0.88

1.375

5/16 x 5/32

5.12

12.89

4.00

11.66

13.75

25.4

5.00

0.56

21.25

16

2.00

2.25

0.88

1.625

3/8 x 3/16

5.65

14.76

18

4.50

12.96

14.75

27.7

6.50

0.81

22.75

16

2.50

2.75

1.00

1.875

1/2 x 3/16

6.37

16.63

20

5.00

13.97

15.75

29.7

6.50

0.81

25.00

20

2.50

2.75

1.00

1.875

1/2 x 3/16

7.12

18.58

24

6.00

16.19

19.00

35.2

6.50

0.81

29.50

1-8
1*
1-8
1*
1-1/8 - 7
1-1/8*
1-1/8 - 7
1-1/8*
1-1/4 - 7
1-1/4*

12

16

16.20
17.3*
18.16
19.2*
20.35
21.4*
22.63
23.6*
27.31
28.3*

20

2.50

3.00

1.00

1.875

1/2 x 3/16

8.67

22.56

350

76

270

324

594

127

14.2

476

51

57

22.4

34.93

7.94 x 3.97

130

327

102

296

349

645

127

14.2

540

16

51

57

22.4

41.28

9.53 x 4.76

144

375

450

114

329

375

704

165

20.6

578

16

64

57

25.4

47.63

12.70 x 4.76

162

422

500

127

355

400

754

165

20.6

635

20

64

57

25.4

47.63

12.70 x 4.76

181

472

600

152

411

483

894

165

20.6

749

1-8
1*
1-8
1*
1-1/8 - 7
1-1/8*
1-1/8 - 7
1-1/8*
1-1/4 - 7
1-1/4*

12

400

411
439*
461
488*
517
544*
575
599*
694
719*

20

64

76

25.4

47.63

12.70 x 4.76

220

573

Size mm

* Wafer valve dimension is the bottom figure. Lug valve dimension is the top figure.
Note: For general dimensions, see page 28.

17

SERIES NF-C DIMENSIONAL DATA
30” to 36” (750 mm to 900 mm)

For ASME Class 150 Series A
and MSS-SP-44 Flanged Pattern

R

J–Bolt Circle
K–Bolt Size
L–No. of Bolts Total
V–Depth of Thread

N
H
G

R
N

P

4 Locating lugs for
ASME Class 150 Series A
and MSS SP-44
Flanged Pattern

S

M

J–Bolt Circle
K–Bolt Size
L–No. of Bolts Total
V–Depth of Thread

T

C

D

U

B

A

E

Dimensional Data
Size in.
30
36

A

B

C

D

E

G

H

J

K

L

M

N

P

R

S

T

U

V

6.50
7.88

21.2
25.0

23.0
27.8

44.2
52.8

34.1
40.5

8.00
10.25

0.69
0.81

36.00
42.75

1-1/4 - 7UNC
1-1/2 - 6UNC

28
32

3.4
4.0

3.7
4.4

1.2
1.5

3.000
3.625

3/4 x 3/8
7/8 x 7/16

11.45
13.86

28.55
34.71

1.750
1.750

165
200

538
635

584
706

1123
1342

866
1029

203
260

17.53
20.57

914
1086

1-1/4 - 7UNC
1-1/2 - 6UNC

28
32

86
102

94
112

30.5
38.1

76.2
92.1

19.05 x 9.53
22.23 x 11.11

291
352

725
882

44.45
44.45

Size mm
750
900

Note: For general dimensions, see page 28.

18

SERIES NE-D DIMENSIONAL DATA
2” to 12” (50 mm to 300 mm)

F
R
N

S

J–Bolt Circle
K–Stud Size
L–No. of Studs

P

H
G

C

D

E

A

Dimensional Data
Size in.
2
2-1/2
3
4
5
6
8
10
12

A

C

D

E

F

G

H

J

K

L

N

P

R

S

1.74
1.86
1.86
2.11
2.24
2.24
2.54
2.74
3.24

3.94
4.44
4.88
6.00
6.00
6.50
8.06
9.97
10.91

6.75
7.50
8.19
9.88
10.38
11.50
14.19
17.41
20.41

4.12
4.88
5.38
6.88
7.75
8.75
11.00
13.38
16.12

4.00
4.00
4.00
4.00
4.00
4.00
6.00
6.00
6.00

3.25
3.25
3.25
3.25
3.25
3.25
5.00
5.00
5.00

0.408
0.408
0.408
0.408
0.408
0.408
0.533
0.533
0.533

4.27
5.31
4.91
7.03
7.56
9.16
11.72
13.72
16.62

3/8
3/8
3/8
1/2
1/2
1/2
5/8
5/8
1/2

4
4
6
6
6
8
8
8
12

1.00
1.00
1.00
1.00
1.25
1.25
1.38
1.38
1.38

0.44
0.44
0.44
0.44
0.44
0.44
0.56
0.56
0.56

0.625
0.625
0.625
0.625
0.838
0.838
0.838
0.963
1.338

0.375
0.375
0.375
0.375
0.500
0.500
0.500
0.625
0.750

44
47
47
54
57
57
65
70
82

100
113
124
152
152
165
205
253
277

171
191
208
251
264
292
360
442
518

105
124
137
175
197
222
279
340
409

102
102
102
102
102
102
152
152
152

83
83
83
83
83
83
127
127
127

10.36
10.36
10.36
10.36
10.36
10.36
13.54
13.54
13.54

108
135
125
179
192
233
298
348
422

10
10
10
15
15
15
16
16
15

4
4
6
6
6
8
8
8
12

25
25
25
25
32
32
35
35
35

11.2
11.2
11.2
11.2
11.2
11.2
14.2
14.2
14.2

15.88
15.88
15.88
15.88
21.29
21.29
21.29
24.46
33.99

9.53
9.53
9.53
9.53
12.70
12.70
12.70
15.88
19.05

Size mm
50
65
80
100
125
150
200
250
300

Note: For general dimensions, see page 28.

19

SERIES NE-I, NE-I SANITARY
2” to 12” (50 mm to 300 mm)

R

R

N

N

J–Bolt Circle
K–Stud Size
L–No. of Studs

P

P
C

C

F
D
S

H
G
E

A

Dimensional Data
Size in.
2
2-1/2
3
4
5*
6
8
10
12

A

C

D

E

F

G

H

J

K

L

N

P

R

S

1.74
1.86
1.86
2.11
2.24
2.24
2.54
2.74
3.24

3.94
4.44
4.69
5.44
6.38
6.88
8.06
9.97
10.91

6.75
7.50
8.00
9.31
10.75
11.88
14.19
17.41
20.41

4.12
4.88
5.38
6.88
7.75
8.75
11.00
13.38
16.12

4.00
4.00
4.00
4.00
4.00
4.00
6.00
6.00
6.00

3.25
3.25
3.25
3.25
3.25
3.25
5.00
5.00
5.00

0.408
0.408
0.408
0.408
0.408
0.408
0.533
0.533
0.533

4.75
5.50
6.00
7.50
8.50
9.50
11.75
14.25
17.00

5/8 - 11
5/8 - 11
5/8 - 11
5/8 - 11
3/4 - 10
3/4 - 10
3/4 - 10
7/8 - 9
7/8 - 9

4
4
4
8
8
8
8
12
12

1.00
1.00
1.00
1.00
1.25
1.25
1.38
1.38
1.38

0.44
0.44
0.44
0.44
0.44
0.44
0.56
0.56
0.56

0.625
0.625
0.625
0.625
0.838
0.838
0.838
0.963
1.338

0.375
0.375
0.375
0.375
0.500
0.500
0.500
0.625
0.750

44
47
47
54
57
57
65
70
82

100
113
119
138
162
175
205
253
277

171
191
203
236
273
302
360
442
518

105
124
137
175
197
222
279
340
409

102
102
102
102
102
102
152
152
152

83
83
83
83
83
83
127
127
127

10.36
10.36
10.36
10.36
10.36
10.36
13.54
13.54
13.54

121
140
152
191
216
241
298
362
432

5/8 - 11
5/8 - 11
5/8 - 11
5/8 - 11
3/4 - 10
3/4 - 10
3/4 - 10
7/8 - 9
7/8 - 9

4
4
4
8
8
8
8
12
12

25
25
25
25
32
32
35
35
35

11.2
11.2
11.2
11.2
11.2
11.2
14.2
14.2
14.2

15.88
15.88
15.88
15.88
21.29
21.29
21.29
24.46
33.99

9.53
9.53
9.53
9.53
12.70
12.70
12.70
15.88
19.05

Size mm
50
65
80
100
125*
150
200
250
300

* NE-I sanitary 5” (125 mm) not available.
Note: For general dimensions, see page 28.

20

SERIES NEI-T
2” to 10” (50 mm to 250 mm)

F

S

H
G

R

R
N

N

J–Bolt Circle
K–Stud Size
L–No. of Lugs

P

P
C

C

D

A

E

Dimensional Data
Size in.
2
2-1/2
3
4
6
8
10

A

C

D

E

F

G

H

J

K

L

N

P

R

S

1.74
1.86
1.86
2.11
2.24
2.54
2.74

3.94
4.44
4.69
5.44
6.88
8.06
9.97

6.75
7.50
8.00
9.31
11.88
14.19
17.41

4.12
4.88
5.38
6.88
8.75
11.00
13.38

4.00
4.00
4.00
4.00
4.00
6.00
6.00

3.25
3.25
3.25
3.25
3.25
5.00
5.00

0.408
0.408
0.408
0.408
0.408
0.533
0.533

4.75
5.50
6.00
7.50
9.50
11.75
14.25

5/8 - 11
5/8 - 11
5/8 - 11
5/8 - 11
3/4 - 10
3/4 - 10
7/8 - 9

4
4
4
8
8
8
12

1.00
1.00
1.00
1.00
1.25
1.38
1.38

0.44
0.44
0.44
0.44
0.44
0.56
0.56

0.625
0.625
0.625
0.625
0.838
0.838
0.963

0.375
0.375
0.375
0.375
0.500
0.500
0.625

44
47
47
54
57
65
70

100
113
119
138
175
205
253

171
191
203
236
302
360
442

105
124
137
175
222
279
340

102
102
102
102
102
152
152

83
83
83
83
83
127
127

10.36
10.36
10.36
10.36
10.36
13.54
13.54

121
140
152
191
241
298
362

5/8 - 11
5/8 - 11
5/8 - 11
5/8 - 11
3/4 - 10
3/4 - 10
7/8 - 10

4
4
4
8
8
8
12

25
25
25
25
32
35
35

11.2
11.2
11.2
11.2
11.2
14.2
14.2

15.88
15.88
15.88
15.88
21.29
21.29
24.46

9.53
9.53
9.53
9.53
12.70
12.70
15.88

Size mm
50
65
80
100
150
200
250

Note: For general dimensions, see page 28.

21

HANDLES
HOW TO ORDER

8

(X X X X X - 0 0 X)
XXXXX
Base Part Number

00X
Trim

-

20

27

5
25

Standard
Corrosion-Resistant
Sanitary

in.
(mm)

Description
10-Position, Standard, CR
2-Position, Standard, CR
10-Position, Sanitary
2-Position, Sanitary
Throttling, Standard, CR
Throttling, Sanitary
Square Nut, Standard
Weight (lb)

1
2
3

2 to 4
5 to 6
(50 to 100) (125 to 150)
24227
24232
22319
22324
24252
22329
23356
2.3

28

15

24228
24233
22320
22325
24253
22330
23357
2.9

8
(200)

10
(250)

12
(300)

24229
24234
22321
22326
24254
22331
23358
6.5

24230
24235
22322
22327
24255
22332
23359
6.5

24231
24236
22323
22328
24256
22333
22360
6.5

16

29

26

16
19

19
M

N

Infinite Throttling with Memory Stop Handle
in.
2 to 4
5 to 6
8 to 12
Dimension (mm) (50 to 100) (125 to 150) (200 to 300)
8

M
N

12

10

11

15

M
N

16

0.25 Padlock hole
19

2-Position/10-Position Locking Handles

2-Position/10-Position Locking Handles
Key
Description
No.
5
8
10
11
12
15
16
19
20
25*
26*
27*
28*
29*

Screw
Handle
Latch
Spring
Spring Pin
Throttle Plate
Lockwasher
Nut
Set Screw
Throttling Tab
Carriage Bolt
Wing Nut
Screw
Nut

Dimension

Standard

Material
Corrosion-Resistant

Sanitary

Steel
Ductile Iron
Zinc-Plated Steel
Spring Steel
Spring Steel
Zinc-Plated Steel
Steel
Steel
Steel
Zinc-Plated Steel
Steel
Steel
Steel
Steel

Stainless Steel
Ductile Iron
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel

Stainless Steel
Bronze
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel

* For throttling, memory stop handle only.

22

15.00 (381)
1.13 (28.7)

10
16

19

11.00 (279)
1.07 (27.2)

15

20
5

9.50 (241)
0.85 (21.6)

in.
2 to 4
5 to 6
8 to 12
(mm) (50 to 100) (125 to 150) (200 to 300)

M
N

9.50 (241)
0.87 (22.1)

11.00 (279)
1.07 (27.2)

15.00 (381)
1.13 (28.7)

sq

Square Nut Handle
Description

Material

Square Nut Hub
Throttle Plate
Screw
Set Screw
Lock Washer

Ductile Iron
Steel
Steel
Steel
Spring Steel

WORM GEAR OPERATORS
Gray iron weatherproof case and cover enclose a ductile iron
gear and hardened steel worm supported by bronze bearings.
Standard external coating is green enamel. White epoxy, coal
tar epoxy and inorganic zinc primer are available upon special
request.

Manual worm gear operators are self-locking in all positions.
Adjustment screws stop travel at open and closed positions.
Position indicator is standard on all models. Gearing is
permanently lubricated.

HOW TO ORDER
2” to 12” (50 mm to 300 mm)
XXXXX
Base Part Number

-

X

X

X

X

X

Case Material

Gear Material

Actuation

Valve Size

Configuration

Gray Iron

Description
Operator Base No.
Additional Information
Chain Suffix = Length in ft*
Weight lb (kg) with Handwheel

2

Ductile Iron

1

Crank
Handwheel
Chainwheel
Square Nut
None

1
3
5
6
9

2” to 4”
(50 mm to 100 mm)
5” and 6”
(125 mm and 150 mm)
8” (200 mm)
10” (250 mm)
12” (300 mm)

1

Standard

2

5
7
8
9

2” to 4”
(50 mm to 500 mm)

5” to 6”
(125 mm to 150 mm)

8”
(200 mm)

10”
(250 mm)

12”
(300 mm)

22622

22622

22623

22623

22623

4462-XXX
7.8 (3.5)

4462-XXX
7.8 (3.5)

4462-XXX
17.2 (7.8)

4462-XXX
17.2 (7.8)

4462-XXX
18.6 (8.4)

14” to 36” (350 mm to 900 mm)
XXXXX
Base Part Number

X
Gear Operator
Assembly Part Number

-

Gear Operator Less Actuation

09

Gear Operator with Handwheel

03

Gear Operator with Chainwheel

05

Gear Operator with Square Nut

06

Description
Operator Base No.
Additional Information
Chain Suffix = Length in ft*
Weight (lb (kg) with handwheel)

Valve Size

14”
(350 mm)

16”
(400 mm)

18” to 20”
(450 mm to 500 mm)

24”
(600 mm)

30”
(750 mm)

36”
(900 mm)

2060229

2060230

2060231

2060232

2060332

2060334

4462-XXX
19.0 (8.6)

4463-XXX
22.0 (10.0)

4463-XXX
33.0 (15.0)

19932-XXX
43.0 (19.5)

4463-XXX
107.0 (48.5)

19932-XXX
137.0 (62.1)

in.

(mm)

Gear Ratio

Turns/90 Degree
Rotation

Maximum Input Torque

2 to 6
8 to 12
14 to 16
18 to 20
24
30
36

(50 to 150)
(200 to 300)
(350 to 400)
(450 to 500)
(600)
(750)
(900)

30:1
48:1
48:1
57:1
60:1
316:1
240:1

7-1/2
12
12
14-1/4
15
79
60

46 ft-lb
65 ft-lb
65 ft-lb
98 ft-lb
164 ft-lb
104 ft-lb
174 ft-lb

(Example: 6” (150 mm) with Handwheel – 22622-21352)
* Chain length (xxx) = 000 to 999 ft (chain ordered separately).

23

WORM GEAR OPERATORS (CONT.)
K
A

B

C

C

J

K

A

D

L

F

R

B

N
E

D

L

F

E
H
G

J
J

M

H

M1

G

valves
R

V

S

T

U

Dimensional Data
Size in.

A

B

C

D

E

F

G

H

J

K

L

M

M1

N

P

R

S

T

U

V

2 to 6
8 to 10
12
14
16
18 to 20
24
30
36

1.80
2.88
2.88
2.88
2.88
3.12
3.44
4.56
5.88

1.80
2.88
2.88
2.88
2.88
3.12
3.44
8.88
9.12

3.80
3.38
3.38
5.12
5.88
7.12
5.28
4.52
4.56

1.64
2.50
2.50
2.50
2.50
3.00
3.63
4.63
6.25

1.59
2.88
2.88
2.88
2.88
3.12
3.25
4.63
5.88

4.97
6.50
6.50
6.50
6.50
7.69
8.38
11.08
14.50

0.90
1.38
1.38
1.38
1.38
1.50
1.63
2.00
2.31

2.30
3.00
3.00
3.00
3.00
3.25
3.56
4.44
5.00

0.623
0.623
0.623
0.623
0.623
1.000
1.000
1.000
1.000

1.00
1.00
1.00
1.25
1.25
1.25
1.25
1.25
1.25

0.19
0.19
0.19
0.19
0.25
0.25
0.38
0.39
0.39

6.00
6.36

7.38
8.00

4.80
4.32
5.02
6.56
11.00
11.25
10.91
8.65
10.19

6
6
8
12
18
18
24
18
24

4.80
4.32
4.32
5.88
7.69
8.94
7.59
7.59
8.13

4.10
3.72
3.72
5.25
6.38
7.63
5.91
6.28
6.44

3.50
3.50
3.50
5.81
9.12
9.12
11.00
9.12
11.00

4.80
4.80
4.80
5.75
8.69
8.69
12.25
8.69
12.25

4.60
4.12
4.12
5.69
6.75
8.00
6.16
5.41
5.44

46
73
73
73
73
79
87
116
149

46
73
73
73
73
79
87
226
232

97
86
86
130
149
181
134
115
116

42
64
64
64
64
76
92
118
159

40
73
73
73
73
79
83
118
149

126
165
165
165
165
195
213
281
368

23
35
35
35
35
38
41
51
59

58
76
76
76
76
83
90
113
127

16
16
16
16
16
25
25
25
25

25
25
25
32
32
32
32
32
32

4.8
4.8
4.8
4.8
6.4
6.4
9.7
9.9
9.9

152
162

187
203

122
110
128
167
279
286
277
220
259

152
152
203
305
457
457
610
457
610

122
110
110
149
195
227
193
193
207

104
94
94
133
162
194
150
160
164

89
89
89
148
232
232
279
232
279

122
122
122
146
221
221
311
221
311

117
105
105
145
171
203
156
137
138

Size mm
50 to 150
200 to 250
300
350
400
450 to 500
600
750
900

* DT-1 gear operator dimensions became standard gear operator mid-year 2000 (for old style DT-3, consult Cameron).

24

STEM EXTENSIONS
Fabricated from carbon steel, stem extensions are contained
in a tubular housing. Lengths from 3” to 16 ft are fabricated
to order. Torsional deflection of lengths greater than 16 ft
require special design consideration and are available by
special order only.

HOW TO ORDER
2” to 12” (50 mm to 300 mm)
XXXXX
Base Part Number

Description
Carbon Steel

in.
(mm)

14” to 24” (350 mm to 600 mm)
XXXXX
Base Part Number

XXX
Length in. (mm)

-

XXX00
Length in. (mm)

-

2 to 4
(50 to 500)

5 to 6
(125 to 150)

8
(200)

10
(250)

12
(300)

14
(350)

16
(400)

18 to 20
(450 to 500)

24
(600)

23318

23319

23320

23321

23322

24529

24530

24531

24532

* Note: Consult Cameron for 30” (750 mm) and 36” (900 mm) valve stem extensions.

25

GENERAL TECHNICAL INFORMATION
Pressure Rating
Three drop-tight pressure ratings are offered for DEMCO
butterfly valves. Normally, 200-psi shutoff is used in butterfly
applications. However, 285-psi shutoff is optionally available
for higher pressure applications. For smaller actuator sizing,
50-psi valves offer reduced torque.
For reduced torque, throttling valves, which do not provide
drop-tight closure, are available.

Wafer Valve Connection

Marking
Each valve is positively identified by marking and tagging per
MSS-SP-25.

Vacuum Rating
DEMCO butterfly valves will seal against 10 microns of
vacuum (29.9 inHg). For reduced torque and extended seat
life, 50-psi discs are recommended for the dry service
conditions found in many vacuum applications.

End-of-Line Service
Lug body valves can be used in end-of-line service, with
downstream piping removed. Only weld neck or socket
flanges can be used for this service. Since upstream pressure
is excluded between the flange and the seat face by the
exclusive DEMCO flange seal, there is no effective force to
slide the seat downstream. DEMCO lug butterfly valves are
recommended for liquid service up to 200 psi with
downstream piping removed.
Lug body valves are recommended for the isolation of
pumps, control devices or other system components that
may need to be removed for repair or replacement.
Lug valves also are suitable for installation at points from
which piping expansions may proceed. Such valves normally
are blanked with blind flanges to protect the exposed seats
until new piping is attached.

Actuation
Positive latch handles, worm gear operators and automatic
actuators are available and interchangeable on the DEMCO
valve.
The DEMCO top flange is dimensionally compatible with
other competitive butterfly valves. With the optional “utility
top” stem, the DEMCO valve interchanges directly with
competitive valves, allowing valve replacement without the
need for new actuation.

Installation and Maintenance
DEMCO butterfly valves are bi-directional, with identical flow
way from either face. To install, simply close the valve, insert
between flanges and make up with studs or capscrews. No
regular maintenance or lubrication is ever required.
Disassembly for inspection or replacement of parts is simple.
Open the valve, remove handle or actuator, remove
tangential pins, pull out the stems, and push the disc and
seat out of the body. Reassemble in reverse order, with a
small amount of general purpose non-hydrocarbon based
lubricant on the outside of stems, seat and disc flats.
Steel or cast iron flanges of either raised or flat-faced type
are suitable for use with DEMCO butterfly valves. Plastic
flanges are subject to damage at installation by overtightening the bolting and may deflect or cup, resulting in
flange leaks. Refer proposed plastic flange installations to
Cameron’s DEMCO brand quotations department for review
and recommendation.

Upstream

Disc

Lug Valve Connection with Downstream Flange Removed

26

Throttling discs with no seat interference do not provide a
stem seal. Stem O-rings are provided for this application.
Flange gaskets assist the O-rings in 2” to 12” (50 mm to
300 mm) valves, and must be used only with throttling discs.

The lower right-hand corner of the graph
with the heavy line border represents line
velocities below 15 ft /sec and normally is
used for valve sizing in liquid applications.
c
is
D
e

l
ng
A

Butterfly valves are economical throttling
devices. Reliable throttling can be attained at
disc openings from 25 to 70 degrees.

s

e
re

eg

D

re

su

n

pe

O

es
Pr

Sample Computation for Water

D
p
ro

Water, with specific gravity of 1.0 and flow
rate of 1200 gal /min, to 6” (160 mm)
butterfly valve.

gh

u
ro

Th

Pressure Drop (psi) Water at 68º F

This nomograph gives corresponding values
for the parameters of flow rate, valve size,
disc angle and pressure drop of DEMCO
butterfly valves in 1.0 specific gravity water
service at 68° F (20° C).

Fu
n

pe

O

ll-

Required: Pressure drop at full and
75-degree disc openings. Project horizontally
from 1200 gal /min to 6” (150 mm) valve
curve. Project vertically upward to fully open
valve curve, then horizontally to read 0.35
psi pressure drop. Continue upward
projection to intersect 75-degree opening
curve, then horizontally to read 0.8 psi
pressure drop.

ve

l
Va

ze
–
es

ch

In

0.217

Si

15 psi x

e
lv
Va

Required: Pressure drop through fully open
valve. Disregarding change in gas condition
by pressure drop across valve, proceed from
40,000 cf/hr, as in liquid computation, to
read 15 psi pressure drop. Convert pressure
drop from water to air by multiplying this
value times the ratio of air-to-water
densities:

Flow Rate (gpm)

Air, with density of 0.217 lb/cf, flow rate of
40,000 cf/hr, to 5” (125 mm) butterfly valve.

Flow Rate (cf/hr)

Sample Computation for Air

= 0.052 psi

62.4
To determine pressure drop for any fluid,
multiply value obtained from the nomograph
by the quotient of the fluid density, in lb/cf,
divided by 62.4.

Gas

Liquid

27

GENERAL TECHNICAL INFORMATION (CONT.)
General Dimensions 2” to 20” (50 mm to 500 mm)
Dimensions

Valve Size in.
(mm)

2
(50)

2-1/2
(65)

3
(80)

4
(100)

5
(125)

6
(150)

8
(200)

10
(250)

12
(300)

14
(350)

16
(400)

18
(450)

20
(500)

A – Schedule 40
Flange ID*

(Except Slip-On)
(Slip-On)

2.07
(53)
2.44
(62)

2.47
(63)
2.94
(75)

3.07
(78)
3.57
(91)

4.03
(102)
4.57
(116)

5.05
(128)
5.66
(144)

6.07
(154)
6.72
(171)

7.98
(203)
8.72
(221)

10.02
(255)
10.88
(276)

12.00
(305)
12.88
(327)

13.25
(337)
14.14
(359)

15.25
(387)
16.16
(410)

17.25
(438)
18.18
(462)

19.25
(489)
20.20
(513)

2.65
(67)
3.62
(92)
4.12
(105)
3.12
(79)
3-3/4
6-3/4
6-5/8
2-1/4
1.467
(37)
3.25
(83)
2.33
70%
4
8
5/8 - 11
5
1-1/2

3.15
(80)
4.12
(105)
4.87
(124)
3.62
(92)
4-1/8
7-3/8
7-3/16
2-13/16
2.144
(54)
3.62
(92)
3.92
82%
4
8
5/8 - 11
5-1/2
1-1/2

3.78
(96)
5.00
(127)
5.37
(136)
4.25
(108)
4-1/4
7-3/8
7-1/8
3-5/16
2.743
(70)
3.75
(95)
5.93
80%
4
8
5/8 - 11
5-1/2
1-3/4

4.78
(121)
6.18
(157)
6.87
(174)
5.25
(133)
4-3/4
8-1/8
7-7/8
4-3/16
3.601
(91)
4.00
(102)
10.01
79%
8
16
5/8 - 11
5-3/4
1-3/4

5.84
(148)
7.31
(186)
7.75
(197)
6.31
(160)
5-1/8
9-1/4
8-15/16
5-1/16
4.582
(116)
4.12
(105)
14.98
73%
8
16
3/4 - 10
6-1/2
2

7.03
(179)
8.50
(216)
8.75
(222)
7.46
(189)
5-3/8
9-1/4
8-7/8
6-1/16
5.624
(142.8)
4.25
(108)
22.09
76%
8
16
3/4 - 10
6-1/2
2-1/4

8.96
(228)
10.62
(270)
11.00
(279)
9.43
(240)
6-1/16
10-9/16
10-3/16
7-15/16
7.428
(189)
4.81
(122)
39.43
79%
8
16
3/4 - 10
7
2-1/4

11.09
(282)
12.75
(324)
13.37
(340)
11.56
(294)
6-5/8
10-3/4
10-5/16
10
9.382
(238)
5.12
(130)
61.52
78%
12
24
7/8 - 9
7-1/2
2-1/2

B – Seal Diameter
C – Raised Face Diameter
D – Valve Body Diameter
E – Seat OD
F – End-to-End

Threaded ASME Socket and Slip-On
Weld End ASME
Grooved

G – Seat ID
H – Disc Chord**

Resilient Seated Valves

J – Outside-toASME 150
Outside
Resilient Seated – sq in.
Throughput
Area
% Schedule 40 Pipe
Number of Studs
Number of Capscrews
Size of Studs or Capscrews – Threads per in.
Length of Studs (in.)
Length of Capscrews (in.)

*

13.09
14.14
16.16
18.18
20.20
(332)
(359)
(410)
(462)
(513)
15.00
16.25
18.50
21.00
23.00
(381)
(413)
(470)
(533)
(5840)
16.12
17.20
19.27
21.43
23.60
(409)
(437)
(489)
(544)
(599)
13.56
15.14
17.04
19.06
21.08
(344)
(385)
(433)
(484)
(535)
7-5/8
7-1/2
9
9-13/16 10-11/16
12-1/4
13
14
15-7/16 16-5/16
11-13/16
11-15/16 13-5/32 15-7/32 17-5/32 19-5/32
11.35
12.86
14.72
16.61
18.53
(288)
(327)
(374)
(422)
(471)
5.75
5.75
6.87
7.56
8.31
(146)
(146)
(174)
(192)
(211)
89.54
111.2
150.5
186.1
80%
82%
85%
83%
87%
12
12
16
16
20
24
24
32
32
40
7/8 - 9
1-8
1-8
1-1/8 - 7 1-1/8 - 7
8-1/4
8-1/4
10
10-1/2
11-3/4
2-1/2
3-1/4
3-1/2
4
-

DEMCO butterfly valves are designed to seal without flange gaskets against flange faces with IDs between slip-on flange bore and
schedule 40 weld neck flange bore.
2” to 12” (50 mm to 300 mm) disc will open into schedule 80 pipe ID.

**

General Dimensions 24” to 36” (600 mm to 900 mm)
Dimensions
A – Standard Flange ID

Valve Size in.
(mm)
(Except Slip-On)

B – Seal Diameter
C – Raised Face Diameter
D – Valve Body Diameter
E – Seat OD
F – End-to-End Weld End

ASME

G – Seat ID
H – Disc Chord
J – Outside-to-Outside

ASME

Number of Studs
Number of Capscrews
Size of Capscrews – Threads per in.
Length of Studs (in.)
Length of Capscrews (in.)
Throughput
Area

sq in.
% std. pipe

24
(600)

30 •
(750) •

36 •
(900) •

23.25
(591)
24.25
(616)
27.25
(692)
28.23
(717)
25.49
(647)
18.00
(457)
23-1/4
22.57
(573)
9.75
(248)
20
40
1-1/4 - 7
12-1/2
4
352.4
88%

29.25
(743)
30.00
(762)
-

35.25
(895)
35.94
(913)
-

34.05
(865)
31.47
(799)
16.75
(425)
29-5/16
28.67
(728)
10.75
(273)
*
56
1-1/4 - 7
*
5
546
81%

40.49
(1028)
37.63
(956)
18.63
(473)
35-5/16
34.70
(881)
12.63
(321)
**
64
1-1/2 - 6
**
***
800
82%

*
24 studs: 1-1/4” - “7 x 15-1/2”; Eight capscrews: 1-1/4” - 7” x 5”
** 28 studs: 1-1/2” - 6” x 18-1/2”; Eight capscrews: 1-1/2” - 6” x 5-1/2”
*** 56 screws: 1-1/2” - 6” x 6”; Eight screws: 1-1/2” - 6” x 5-1/2”
•	Dimensions are for ASME Class 150 Series A flanges or MSS-SP-44 flanges.
Consult Cameron for ASME Class 125 flanges.

28

J
D

C
E
B
G
A

H

F

Flow Coefficients (Cv)
Degree
Open
90º
80º
75º
70º
60º
50º
40º
30º
25º

2
(50)

2-1/2
(65)

3
(80)

4
(100)

5
(125)

6
(150)

8
(200)

145
115
95
70
53
27
17
9
6

225
175
135
105
83
42
26
15
10

325
260
215
160
125
63
38
22
15

590
510
410
305
235
120
73
42
28

1125
1000
830
625
490
250
155
88
60

1950
1650
1350
1030
800
410
250
145
98

3250
2725
2200
1750
1300
700
420
250
170

Valve Size in. (mm)
10
12
14
(250)
(300)
(350)

CV values, given above, may be employed in the formula:

7500
6050
5000
4050
3100
1600
1000
550
380

10,000
8100
6700
5100
4100
2200
1300
750
500

18
(450)

20
(500)

24
(600)

30
(750)

36
(900)

13,600
11,500
9500
7100
5100
2650
1700
900
650

18,000
14,300
12,100
9200
7100
3700
2300
1250
900

22,600
18,000
15,000
11,500
8700
4600
2800
1600
1125

30,000
25,000
21,000
16,500
11,750
6100
3800
2200
1500

47,000
38,000
31,500
25,500
18,000
9700
6000
3500
2300

70,000
60,000
48,000
39,500
28,000
15,000
9200
5300
3500

Water Hammer
Water hammer is a series of shocks in a piping system
caused by rapidly stopping the flow of fluid in that system.

DP x 62.4

Q = CV x

5000
4300
3600
2750
2150
1150
670
390
260

16
(400)

D

Where:
Q = gal/min of flow through the valve
DP = psi pressure drop across the valve

Although it is difficult to measure pressure spikes caused by
water hammer shock with ordinary equipment, maximum
obtainable pressures caused by instantaneous valve closure
can be approximated by the following formula:

D = density of fluids in lb/cu ft
Pressure drop is computed by rearranging the formula to the
following:
Q2 x D

DP =

		

CV2 x 62.4

		

Sample Computations
What is the flow rate of water at ambient temperature
through a 4” (100 mm) butterfly valve that is 70 degrees
open when the pressure drop across the valve is 0.5 psi?
(Density of water at 68° F is 62.4 lb/cu ft.)
DP x 62.4

Q = CV x

0.5 x 62.4
D

= 305 x

0.707

Q = 215.6 gal/min

What is the pressure drop across an 8” (200 mm) butterfly
valve that is fully open, flowing 2000 gal/min of solvent with
a density of 55 lb/cu ft?
		

DP =

=

In other words, pressure increases 58 psi for each ft /sec of
interrupted pipeline velocity.
A pipe carrying fluid at a velocity of 15 ft/sec velocity will
have an instantaneous pressure increase of 870 psi under
rapid closure conditions.
The effects of water hammer are seen in a butterfly valve as
bent disc and stems, a broken body or both.
Water hammer can be reduced or eliminated by slowing
valve closure time in accordance with the following formula:

D

= 305 x

		

Pressure (max.) = interrupted velocity (fps) x 58 psi/ft /sec

time seconds =

0.14Q
S (P)

Where:
Q = flow in gal/min
S

= upstream pipe size in sq ft

P

= pressure rating of the valve in psi

Generally, a closing time of six to eight seconds is sufficient
to eliminate water hammer.

Q2 x D
CV2 x 62.4
(2000)2 x 55

(3250)2 x 62.4
		

DP = 0.33 psi

29

GENERAL TECHNICAL INFORMATION (CONT.)
Cavitation Data

Example:

Liquid flow is accelerated as it passes through a valve in
such a manner that pressure is decreased below the vapor
pressure and bubbles form. Immediately downstream of the
valve, velocity decreases while pressure increases and the
bubbles collapse, causing possible mechanical damage to the
valve and piping. This is called cavitation. Cavitation often
can be identified by the noise of the collapsing bubbles,
which sounds like gravel flowing in the pipe.

What is the maximum pressure drop possible through a
butterfly valve at 100 psig inlet pressure with water at
68° F (0.339 psia vapor pressure)?

Generally, butterfly valves operate with high-flow capacities
and at low-pressure differentials and are not particularly
susceptible to cavitation.
When butterfly valves are used as control valves, one can
ensure that cavitation will not occur by applying the
following simplified formula:
DPmax = KC (P1 - PV )
Where:
DPmax = differential pressure across the valve
KC

=	cavitation constant
(approximately 0.35 for butterfly valves)

P1

= inlet pressure (psia)

PV

= vapor pressure of the flowing liquid (psia)

30

DPmax = KC (P1 - PV)
Under the above conditions, it is possible to take a 40.03-psi
pressure drop across the valve before cavitation will begin.

TORQUE DATA

Valve Size, in.

Dynamic Torque, in–lb/psi Pressure Drop

The torque (turning effort) required to operate a given
butterfly valve is determined by two factors: friction of the
disc and the seat. The interference and dynamic forces of
flow through the valve tend to open or close the valve. The
actuator torque output must meet or exceed the maximum
torque requirement of the valve. Normal wet opening torque
requirements due to interference are tabulated below. Dry
service will increase opening torque significantly. Consult
Cameron for dry service torque requirements.
The disc of a butterfly valve, in partially opened condition, is
subject to lift forces from passage of fluid over its surfaces.
This effect is analogous to an airplane wing and results in an
unbalanced turning force on the disc. The dynamic torque is
proportional to the pressure drop through the valve and may
become significant in some applications.
Dynamic torque typically is at a maximum when the disk
opening is about 70 degrees. Under high differential
pressure conditions, such torque may exceed the design
strength of stems, connections or actuators. The curves at
right may be used to calculate dynamic torque for DEMCO
butterfly valves and should be consulted in any case where
high differential pressure may occur during valve operation.

Disc Opening, Degrees

Butterfly Valve Torques (Except Series NEI-T)** – Normal Wet Opening – in-lb
Valve Size

in.
(mm)

285 psi Shutoff
200 psi Shutoff
150 psi Shutoff
50 psi Shutoff
Throttling*

2
(50)

2-1/2
(65)

3
(80)

4
(100)

5
(125)

6
(150)

8
(200)

10
(250)

12
(300)

14
(350)

16
(400)

18
(450)

20
(500)

24
(600)

30
(750)

36
(900)

225
132
108
72

326
192
108
72

510
300
192
90

765
450
264
108

1190
700
450
144

1530
900
550
180

2550
1500
1000
350

4125
2650
1800
700

7000
4500
3000
1160

7740
4500
1660

10,280
6500
2800

12,600
8400
3400

15,600
10,800
5000

30,000
20,000
8400

50,000
30,000
-

67,500
50,000
-

Butterfly Valve Torques (Except Series NEI-T)** – Three-Way Assemblies – in-lb
Valve Size
285 psi Shutoff
200 psi Shutoff
150 psi Shutoff
50 psi Shutoff
Throttling*

in.
(mm)

2
(50)

2-1/2
(65)

3
(80)

4
(100)

5
(125)

6
(150)

8
(200)

10
(250)

12
(300)

14
(350)

16
(400)

18
(450)

20
(500)

24
(600)

30
(750)

36
(900)

338
198
162
144

489
288
162
144

765
450
288
180

1148
675
396
216

1785
1050
675
288

2295
1350
825
360

3825
2250
1500
700

6188
3975
2700
1400

10,500
6750
4500
2320

11,610
6750
3320

15,420
9750
5600

18,900
12,600
6800

23,400
16,200
10,000

45,000
30,000
16,800

-

-

* When line velocity exceeds 15 ft/sec, dynamic torque exceeds opening torque.
** Consult Cameron for the torque requirement of the Series NEI-T butterfly valve.

31

STANDARD MATERIAL DATA
Bodies
Description
See page 10 for Assembly Part Number
A395 (60-40-18) *
Ductile Iron
ENC-Coated
A48 (Class 20)
Gray Iron
A126 (Class B)
Bronze
B148 (952)
Steel
A216 (WCB) *
Stainless Steel
A351 (CF8M)
Aluminum
B26

NE-C

NF-C
14” to 24”

NF-C
30” and 36”

NE-I

NE-D

Lug

Lug

Wafer/Lug

Wafer
Wafer

Wafer

NE-I
Sanitary

NEI-T
Wafer/Lug

Wafer/Lug

Wafer

Wafer
Wafer
C/F
Lug

Wafer/Lug
Wafer/Lug
Wafer/Lug
Wafer

Wafer/Lug
Wafer/Lug
Wafer

Wafer/Lug
Wafer/Lug
Wafer/Lug
Wafer

•

•

Discs
Ductile Iron/ Nickel-Plated
Ductile Iron/ PVF-Coated
Aluminum
Bronze
316 SS
Monel **
Alloy 20, 29 NI-20 Cr
Hastelloy C **
61 NI-17 Mo-17 Cr

A536 (65-45-12)
A536 (65-45-12)
B148 (954)
B148 (955)
A743 (CF8M)
A494 (M30C)
A743 (CN-7M)

•
•
•
•
•
•

A494 (CW-2M)

•

QQ-S-764-B
AMS 5648 B
AMS 5643
B164 (Class A)

•
•
•
•

•
•

•

•
•
•

•
•

•
•
•

•
•
•

•
•
•

•
•
•

•

•

•
•
•
•

•
•
•
•

•
•

Stems
416 SS
316 SS
17-4 PH SS
Monel **

•
•
•
•

•
•
•

•
•

•
•
•

* Conforms to USCG Marine requirements, as outlined in 46 C.F.R., part 56.
** See material trademark on page 40. Consult Cameron for special material requirements.

Seats vary. See pages 9, 10 and 11 for seat material description and part
number scheme for available options for different valve series.

Hypalon* is compounded for chemical resistance and is superior in acids
and hydrocarbons. 0° F to 180° F (-18° C to 82° C). Same as CP.

Buna-N is a general purpose elastomer compounded for maximum
hydrocarbon or petroleum resistance.
0° F to 180° F (-18° C to 82° C). Same as Nitrile, Hycar* and NBR.

FKM is superior at elevated temperatures and in harsh chemical
environments. FKM is not suitable for hot water or steam. 20° F to
300° F (-6° C to 149° C). Same as Fluoroelastomer.

General Service EPDM is recommended for water service. Resistance to
saturated steam up to 275° F (135° C) is superior. EPDM is suitable in
alkaline solutions. EPDM is not suitable for oil or hydrocarbons.
Peroxide-cured 20° F to 275° F (-6° C to 135° C).

Natural Rubber generally is superior to other elastomers in abrasion
resistance and is recommended for dry material handling. Use in oils and
solvents is not recommended. -30° F to 150° F (-34° C to 65° C).

Food Grade EPDM is formulated in compliance with FDA guidelines
published in the Code of Federal Regulations, Title 21, paragraph
177.2600. This material is suitable for food service, except milk and
edible oils. Peroxide-cured 20° F to 275° F (-6° C to 135° C).
Sulfur-cured -30° F to 225° F (-34° C to 107° C).
Same as EPDM and Nordel*.
Black Neoprene complies with FDA guidelines and is principally
recommended for food and beverage service. It is resistant to vegetable
oils, brine and oxygen. 0° F to 180° F (-18° C to 82° C).
Same as Polychloroprene and CPE.
White Neoprene complies with FDA guidelines and offers chemical
resistance comparable to black neoprene, but it uses fillers other than
carbon black to provide white coloration. Physical properties are not as
good as black neoprene, and white neoprene should be used only when
black cannot be tolerated. Storage should be under low light conditions
to prevent discoloration. 0° F to 180° F (-18° C to 82° C).

32

Fluorosteam seats offer heat and chemical resistance to hydrocarbons
and hot water or saturated steam. Maximum temperature capability is
dependent on fluid resistance, pressure and flow rates. 20° F to 275° F
(-6° C to 135° C).
ETM-30230 is compounded to combine many of the better media
properties of Buna-N, EPDM or neoprene for service in hydrocarbons,
gasoline, solvents, animal oils and vegetable oils with a temperature
range of -30° F to 230° F (-34° C to 110° C). Abrasion resistance is equal
to Buna-N. Resistance to H2S and CO2 are superior to Buna-N. -30° F to
230° F (-34° C to 110° C).
NEI-T Teflon* SEAT is EPDM elastomer bonded to a virgin TFE covering.
This provides an inert, aseptic non-stick surface, which is excellent for
sanitary food service applications. 0° F to 50° F (-18° C to 10° C).

Other seat elastomers are available for special applications. Consult
Cameron.
* See material trademark note on page 40.

MATERIAL SELECTION GUIDE
The following application is designed for use in determining the available material most likely to give satisfactory service and
is not meant to imply any type warranty. However, certain factors such as temperature, concentration and combinations of
chemicals may affect the fluid resistance of any material. In questionable applications, testing is always the most positive way
to determine suitability. Some materials are available in certain valve sizes and series only.
Stem and Disc

316 SS

Monel*

Aluminum
Bronze

Alloy 20

Hastelloy C*

PVF

Buna-N

Neoprene

Hypalon*

FKM

EPDM

Natural Rubber

ETM-30230

Acetaldehyde
Acetic Acid – Crude
Acetic Acid – Pure
Acetic Acid – 10%
Acetic Acid – 80%
Acetic Acid – Anhydrite
Acetone
Acetophenone
Acetylene
Acrylonitrile
Air (Dry)
Alcohol – Amyl
Alcohol – Butyl
Alcohol – Ethyl
Alcohol – Methyl
Alum – Ammonium
Alum – Chrome
Alum-Potassium
Alumina
Aluminum Chloride
Aluminum Fluoride
Aluminum Hydroxide
Aluminum Sulfate
Amines
Ammonia, Anhydrous
Ammonia Solutions
Ammonium Chloride 50% 180° F (82º C)
Ammonium Hydroxide
Ammonium Nitrate 5% 60° F (16º C)
Ammonium Phosphate
Ammonium Sulfate 90% 180° F (82º C)
Amyl Acetate
Amyl Chloride
Aniline 90% 70° F (21º C)
Aniline Dyes
Antimony Chloride
Arsenic Acid
ASTM Oil #1
ASTM Oil #3
ASTM Ref. Fuel A
ASTM Ref. Fuel B
ASTM Ref. Fuel C
Asphalt
Barium Carbonate 60° F (16º C)
Barium Chloride
Barium Hydroxide
Barium Sulfate 60° F (16º C)
Barium Sulfide

416 SS

E – Excellent
G – Good
F – Fair
U – Unsatisfactory

Seat

Nickel-Plated
Ductile Iron

Rating Interpretation

U
U
U
U
U
U
G
U
G
G
E
F
F
U
U
U
U
U
G
U
U
U
U
U
F
F
U
F
F
U
U
F
F
F
F
U
U
F
F
F
F
F
E
U
U
F
U
F

U
U
U
U
U
U
G
U
E
G
E
G
G
G
G
U
G
F
G
F
G
G
G
F
G
G
G
G
G
E
E
E
E
E
E
E
E

E
E
E
E
E
E
E
G
E
E
E
E
E
E
E
G
G
G
F
G
G
G
E
E
E
G
E
E
E
G
E
E
G
E
G
E
E
E
E
E
E
G
G
E
E
G

E
F
F
F
F
F
E
E
E
E
E
E
E
E
E
G
G
G
G
G
E
G
G
F
U
G
G
G
G
G
E
G
G
E
E
E
E
E
E
G
G
G
G
F

U
U
F
U
U
U
E
U
E
E
E
E
E
E
E
G
G
U
G
U
U
U
U
U
U
U
U
G
E
U
F
U
E
E
G
G
G
E
G
F
U
G
U

E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
G
E
E
E
E
E
E
G
E
E
E
E
E
E
E
E
E
E
E
E
E

E
E
E
E
E
E
E
U
E
E
E
E
E
U
E
E
E
E
E
E
G
U
E
E
E
E
E
E
E
E
E
E
E
E
-

G
E
U
U
F
U
E
E
E
E
E
E
E
E
E
E
E
E
F
E
F
E
E
E
E
E
E

G
G
G
G
G
U
U
U
G
U
E
F
F
G
F
G
G
G
E
G
G
G
E
U
G
G
E
U
E
E
E
U
U
U
U
G
E
E
E
E
G
G
G
E
E
E
E
E

F
E
E
E
E
E
U
F
F
E
F
G
G
E
G
G
G
F
G
G
G
E
U
G
G
E
E
E
E
E
U
U
U
F
G
E
G
U
G
F
F
E
E
E
E
E

U
E
E
E
E
E
U
F
F
E
G
G
G
E
F
G
F
G
G
G
E
U
U
U
E
E
G
E
E
U
U
U
F
G
E
G
U
G
F
F
E
E
U

F
U
U
E
U
E
G
E
G
F
G
G
E
G
E
G
G
E
U
U
U
E
G
E
E
E
U
F
G
E
E
E
E
E
E
E
E
E
E
-

E
F
E
E
U
G
E
F
G
E
G
E
E
E
G
E
F
G
G
E
E
E
E
E
G
U
F
G
U
U
U
U
U
U
E
E
E
E
-

U
F
F
F
U
G
F
G
G
F
F
E
G
G
E
U
U
E
U
G
G
G
U
U
U
G
U
U
U
U
U
U
E
G
U

G
U
U
U
G
E
E
G
G
U
U
G
F
G
G
U
U
U
G
E
E
E
E
E
E
-

* See material trademark note on page 40.

33

MATERIAL SELECTION GUIDE (CONT.)
Stem and Disc

* See material trademark note on page 40.

34

316 SS

Monel*

Aluminum
Bronze

Alloy 20

Hastelloy C*

PVF

Buna-N

Neoprene

Hypalon*

FKM

EPDM

Natural Rubber

ETM-30230

Beer (Beverage)
Beet Sugar Liquors
Benzaldehyde
Benzene (Benzol) 70° F (21º)
Benzoic Acid 5% 70° F (21º)
Black Sulfate Liquor
Bleaching Powder – Wet
Borax (Sodium Borate)
Boric Acid 5% 200° F (93º C)
Brine (Acid)
Brine – Chlorinated
Bromine – Gas
Bromine – Water
Butadiene
Butane – Butylene
Butyl Acetate
Butyric Acid 5% 70° F (21º C)
Calcium Bisulfite
Calcium Carbonate 60° F (16º C)
Calcium Chlorate 20% 160° F (71º C)
Calcium Chlorate 20% 160° F (71º C)
Calcium Chloride
Calcium Hydroxide 50% 175° F (79º C)
Calcium Hypochloride
Calcium Sulfate 90% 60° F (16º C)
Calgon
Caliche Liquor
Cane Sugar Liquors
Carbon Dioxide (Dry)
Carbon Disulfide
Carbon Tetrachloride (Dry)
Carbonic Acid
Caster Oil
Caustic Solutions 34% 200° F (93º C)
China Wood Oil (Tung)
Chlorine Gas – Dry 70° F (21º C)
Chlorobenzene 90% 70° F (21º C)
Chloroform 70° F (21º C)
Chlorosulfonic Acid 10%
Chocolate
Chromic Acid 5% 70° F (21º C)
Citrus Acid 5% 150° F 66º C)
Coconut Oil (Food)
Coffee (Food)
Copper Chromate
Copper Sulfate 80% 175° F (79º C)
Corn Syrup
Cottonseed Oil
Creosol
Creosote
Cresylic Acid
Crude Oil
Cyclohexane
Dextrose (Food)

416 SS

E – Excellent
G – Good
F – Fair
U – Unsatisfactory

Seat

Nickel-Plated
Ductile Iron

Rating Interpretation

U
F
F
F
U
F
U
U
U
U
U
U
F
G
G
U
U
F
F
F
F
F
U
F
F
U
U
U
G
U
F
U
F
F
U
U
U
U
U
F
G
U
E
U
G
F
U

E
E
E
E
G
G
G
F
F
U
U
G
E
E
G
G
G
G
G
E
G
E
E
E
G
G
G
G
F
E
G
U
G
F
U
U
G
E
F
E
G
G
E
U

E
E
E
E
E
E
G
E
E
G
U
U
U
E
E
E
E
E
G
E
E
G
E
G
E
E
E
E
E
E
G
E
E
E
E
G
G
E
G
G
E
E
E
E
E
E
E
E
E
E
E
E
E

E
E
G
G
G
E
G
G
G
F
F
E
E
E
G
U
E
G
G
G
E
G
G
G
E
E
E
F
E
G
G
E
F
F
G
G
G
F
E
E
E
G
E
G
-

U
F
E
E
G
F
U
U
F
G
G
G
E
E
G
U
G
U
U
E
U
E
E
E
G
G
G
U
F
G
G
G
G
U
F
G
F
U
E
G
G
E
G
-

E
E
E
E
E
E
E
E
E
U
U
E
E
E
G
E
E
G
E
G
E
E
E
E
E
E
E
E
E
E
G
E
E
U
E
E
E
E
E
E
E
E
E
E
E
E

E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
-

E
E
G
E
E
E
E
E
E
E
E
U
E
E
E
E
E
E
E
E
G
E
E
E
E
E
E
F
E
E
E
E
E
E
F
G
E
-

G
E
U
U
U
G
G
G
E
E
U
U
F
G
U
U
E
E
E
G
U
F
E
E
E
E
U
U
G
G
F
E
U
U
U
U
E
U
E
E
E
E
E
U
G
U
E
U
E

G
E
U
U
U
G
E
E
E
G
U
G
G
U
U
E
E
E
E
E
E
U
F
E
E
E
G
U
E
E
F
E
U
U
U
U
U
U
E
F
E
E
F
U
U
U
U
-

E
G
U
U
U
G
F
E
E
G
U
G
G
G
U
U
E
E
E
E
E
E
E
G
U
E
E
F
G
G
U
U
U
E
E
F
E
E
G
U
F
U
U
-

E
E
U
G
E
E
E
E
G
E
E
G
E
U
G
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
G
E
U
E
E
E
E
E
G
F
E
E
E
E
-

E
E
U
U
G
E
E
E
G
U
U
U
U
G
U
E
U
E
G
G
U
F
U
U
U
U
E
F
E
E
E
F
U
U
U
U
U
-

G
G
U
U
U
F
F
G
G
U
U
U
U
U
U
U
U
U
E
G
U
E
G
U
U
U
U
U
U
U
F
U
E
E
U
U
U
U
U
U
-

G
U
U
G
G
U
G
U
E
G
F
G
G
F
G
G
F
U
E
G
U
E
-

416 SS

316 SS

Monel*

Aluminum
Bronze

Alloy 20

Hastelloy C*

PVF

Buna-N

Neoprene

Hypalon*

FKM

EPDM

Natural Rubber

Diacetone
Diamylamine
Dichlorethene
Diesel Fuels
Diethyl Amine
Dimethane Sulfide
Dowtherms
Drilling Mud
Ethers
Ethyl Acetate
Ethyl Chloride 5% 60° F (16º C)
Ethyl Glycol
Ethylene Dichloride
Ethylene Oxide
Ferric Chloride
Ferric Nitrate (pH 7+) 5% 60° F (16º C)
Ferric Sulfate 5% 60° F (16º C)
Ferrous Sulfate
Fluorine 70° F (21º C)
Fluorosilicic Acid
Formaldehyde 70° F (21º C)
Formic Acid 5% 150° F (66º C)
Freon 11
Freon 12
Freon 22
Freon 113
Freon 114
Fructose
Fruit Juices (Food) 70%
Fuel Oil
Furfural
Gallic Acid 5% 200° F (93º C)
Gasohol
Gasoline – Regular
Gasoline – Unleaded
Gelatin (Food)
Glucose
Glycerine/Glycerol 70° F (21º C)
Heptane
Hexane
Hydraulic Oils
Hydrobromic Acid 200° F (93º C)
Hydrochloric Acid 10% 60° F (16º C)
Hydrochloric Acid 20% 60° F (16º C)
Hydrochloric Acid 35% 60° F (16º C)
Hydrocyanic Acid
Hydrofluoric Acid 48%
Hydrofluoric Acid 60%
Hydrofluoric Acid 100%
Hydrofluosilicic Acid 5% 70° F (21º C)
Hydrogen
Hydrogen Peroxide 90%
Hydrogen Sulfide – Dry
Hydrogen Sulfide – Wet

Nickel-Plated
Ductile Iron

E – Excellent
G – Good
F – Fair
U – Unsatisfactory

Seat

U
F
U
E
F
G
G
U
F
F
G
U
G
U
U
U
F
U
U
U
U
F
F
F
F
F
U
F
F
U
F
G
F
U
U
F
F
F
F
U
U
U
U
U
U
U
U
U
F
U
F
F

E
E
E
E
G
G
E
G
U
G
U
F
G
G
E
E
E
E
E
U
E
E
G
E
E
U
F
E
G
G
G
U
U
U
U
F
U
U
G
G
F
F
F

E
E
G
E
E
E
E
G
E
E
E
G
G
U
G
E
G
F
G
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
U
U
U
U
G
U
U
U
G
E
G
E
G

G
E
G
E
E
G
E
G
E
G
G
U
F
E
G
G
G
G
E
E
E
E
E
E
E
G
G
E
E
G
G
G
G
E
U
F
U
U
F
F
U
U
G
E
G
G
F

E
E
G
G
E
G
G
G
G
E
E
G
U
U
U
U
U
U
F
E
G
E
E
E
E
E
U
E
G
G
E
E
G
E
G
E
E
E
U
U
U
U
U
U
U
U
E
F
U
F
F

E
G
E
E
E
E
E
E
E
E
E
E
G
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
U
U
U
U
E
F
F
F
G
E
G
G
E

E
E
E
E
E
U
E
E
E
E
E
E
E
E
E
E
E
G
E
E
E
E
E
E
E
-

U
F
E
U
F
F
E
E
E
U
E
E
E
E
E
E
G
E
E
E
E
E
U
F
E
E
E
E
E
E
E
E
E
E
G
E
E
E
E
G
E
E
E
E

U
G
U
E
G
U
E
U
U
E
E
U
U
E
E
E
E
G
E
F
G
G
G
U
G
G
E
G
U
G
U
G
U
E
E
E
E
E
G
U
F
F
F
G
U
G
U
G
E
U
F
-

U
F
U
F
F
G
F
U
U
G
G
U
U
G
E
E
E
F
G
E
G
G
G
G
E
F
U
G
E
E
E
G
G
F
U
G
G
G
G
U
U
U
G
E
U
-

U
F
F
F
G
E
U
U
G
E
U
U
G
E
E
G
E
E
E
E
U
E
E
F
F
F
U
G
G
E
E
E
G
G
E
E
G
G
G
E
E
G
U
E
E
G
G
G

U
U
G
E
U
U
E
E
F
U
G
E
F
U
E
E
E
E
G
E
E
G
U
U
G
F
E
E
U
E
G
E
E
E
E
E
E
E
E
E
E
E
E
E
E
G
F
E
E
G
G
G

E
U
U
F
G
F
G
G
E
U
F
E
E
E
E
F
E
U
U
E
U
U
E
G
U
F
G
U
U
U
E
E
E
U
U
U
E
G
G
E
E
E
F
E
G

U
G
F
U
G
U
U
G
E
U
E
E
E
E
G
F
E
U
G
U
U
E
U
E
E
E
U
U
U
E
G
G
E
G
U
G
U

ETM-30230

Stem and Disc

Rating Interpretation

U
E
U
E
U
G
U
U
G
E
E
F
G
F
F
F
F
E
U
U
E
G
E
E
E
E
G
U
G
G
F

* See material trademark note on page 40.

35

MATERIAL SELECTION GUIDE (CONT.)
Stem and Disc

* See material trademark note on page 40.

36

316 SS

Monel*

Aluminum
Bronze

Alloy 20

Hastelloy C*

PVF

Buna-N

Neoprene

Hypalon*

FKM

EPDM

Natural Rubber

ETM-30230

Iodine Solution
Iso – Octane
Isopropyl Alcohol
Isopropyl Ether
Kerosene
Lacquer Solvents
Lactic Acid 5% 70° F (21º C)
Lard Oil 70° F (21º C)
Lemon Oil
Linseed Oil
Lubricating Oil
Magnesium Chloride 4% 75° F (24º C)
Magnesium Hydroxide
Magnesium Sulfate 5% 120° F (49º C)
Mecuric Chloride 3% 60° F (16º C)
Mecuric Cyanide
Mercurous Nitrate (pH 7+)
Mercury
Methyl Acetate
Methyl Acetone
Methyl Cellosolve
Methyl Chloride
Methyl Ethyl Ketone (MEK)
Milk (Food)
Mineral Oil
Molasses (Food)
Naphtha
Naphthalene
Natural Gas (Methane)
Nickel Ammonium Sulfate
Nickel Chloride
Nickel Sulfate 10% 60° F (16º C)
Nitric Acid 10% 70° F (21º C)
Nitric Acid 30% 70° F (21º C)
Nitric Acid 60% 175° F (79º C)
Nitric Acid 70%
Nitrobenzene
Oils and Fats
Oils, Fish
Olecic Acid 100° F (38º C)
Oleum (Fuming Sulfuric Acid)
Oxalic Acid
Oxygen
Ozone
Palmitic Acid
Perchlorethylene
Petroleum – Refined
Petroleum – Sour
Phenol
Phosgene
Phosphoric Acid 10% 70° F (21º C)
Phosphoric Acid 25% 70° F (21º C)
Phosphoric Acid 75% 70° F (21º C)
Phosphorous Oxychloride

416 SS

E – Excellent
G – Good
F – Fair
U – Unsatisfactory

Seat

Nickel-Plated
Ductile Iron

Rating Interpretation

U
F
F
F
E
F
U
G
U
F
E
F
F
F
U
U
U
E
F
F
F
G
E
U
F
U
F
F
G
U
U
U
U
U
U
U
U
E
U
U
U
U
E
U
U
F
G
U
U
U
U
U
U

U
E
E
E
E
E
F
F
E
E
F
E
G
U
E
G
E
E
G
E
U
U
E
E
E
U
E
G
F
U
F
E
G
G
G
G
F
U
U
-

U
E
E
E
E
E
G
E
E
E
E
G
E
E
F
E
G
E
E
E
E
E
E
E
E
E
E
E
E
E
G
E
G
G
G
G
E
E
E
G
F
G
E
E
E
E
E
G
E
E
G
G
G
-

U
E
E
E
E
E
G
G
E
E
E
G
G
E
U
U
U
E
E
G
F
E
G
G
F
G
G
U
U
U
U
G
G
G
F
E
G
G
E
G
E
F
F
F
-

U
E
E
E
E
E
U
G
E
E
E
F
G
E
U
U
U
U
E
E
E
E
U
G
U
G
G
E
U
U
G
U
U
U
U
E
F
G
F
E
G
G
E
F
G
U
U
U
-

U
E
E
E
E
E
E
E
E
E
E
E
E
E
F
E
E
E
E
E
E
E
E
E
E
E
E
E
E
G
E
G
G
G
G
E
E
E
E
G
G
E
E
E
G
E
G
G
-

E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
G
G
G
G
E
G
G
E
E
E
G
F
-

E
E
E
U
E
E
E
E
E
E
E
E
F
E
E
E
E
U
E
E
G
E
E
E
E
U
U
U
U
F
E
F
E
E
E
E
E
E
E
E
E
E
-

F
E
G
G
E
U
G
E
G
E
E
E
G
E
E
G
F
E
U
U
U
U
U
E
E
G
U
E
E
E
U
U
U
U
U
E
G
F
U
G
G
U
E
F
E
F
U
G
G
F
U
-

U
G
F
F
G
U
E
F
F
G
F
E
E
E
E
F
F
E
U
U
U
U
U
E
G
E
U
U
E
E
E
E
G
F
U
U
U
E
G
U
G
E
F
G
U
G
U
U
G
G
G
-

G
G
E
F
U
U
E
U
G
G
E
E
E
E
F
E
U
U
U
U
U
G
U
U
E
E
E
E
E
U
U
U
F
G
U
G
E
E
F
U
E
E
U
U
G
G
G
-

E
E
E
U
E
U
E
E
E
E
E
E
E
E
F
E
U
U
G
U
E
E
E
E
E
E
E
E
E
E
E
G
U
U
G
E
E
E
E
G
E
E
G
G
G
E
E
G
-

G
U
E
U
U
U
G
U
U
U
E
E
E
E
G
E
G
G
F
E
U
U
E
U
U
U
E
E
G
G
U
U
U
U
U
U
G
E
E
G
U
U
U
U
G
E
E
-

F
U
E
U
U
U
G
U
U
E
G
G
E
E
U
U
U
U
U
U
U
U
F
E
G
U
U
U
U
U
U
G
U
F
U
U
U
U
F
U
U
-

G
G
E
U
E
E
E
G
E
E
F
E
U
U
E
G
E
U
U
U
U
U
E
E
G
U
F
G
G
G
F
E
G
F
-

Stem and Disc

316 SS

Monel*

Aluminum
Bronze

Alloy 20

Hastelloy C*

PVF

Buna-N

Neoprene

Hypalon*

FKM

EPDM

Natural Rubber

ETM-30230

Pickling Sol. (20% Nitric to 4% HF)
Picric Acid 80% 70° F (21º C)
Polyethylene Glycol Dimethyl Ether (Selexol)
Potassium Chloride
Potassium Cyanide
Potassium Hydroxide 5% 70° F (21º C)
Potassium Nitrate 6% 68° F (20º C)
Potassium Phosphate
Potassium Sulfate 7% 180° F (82º C)
Potassium Sulfide
Potassium Sulfite
Propane
Resins and Rosins
SAE #10 Oil
Sea Water 70° F (21º C)
Sewage
Silicate Ester Synthetic Oil
Skydrol 500
Soap Solution (Stearate) 70° F (21º C)
Sodium Acetate 5% 75° F (24º C)
Sodium Aluminate
Sodium Bisulfate
Sodium Carbonate 80% 60° F (16º C)
Sodium Chloride 30% 180° F (82º C)
Sodium Cyanide
Sodium Fluoride 5% 60° F (16º C)
Sodium Hydroxide 5%
Sodium Hydroxide 20%
Sodium Hydroxide 50%
Sodium Hydroxide 70%
Sodium Hypochlorite 5% 60° F (16º C)
Sodium Nitrate 30% 60° F (16º C)
Sodium Perborate
Sodium Peroxide
Sodium Phosphate 5% 60° F (16º C)
Sodium Silicate
Sodium Sulfate 80% 60° F (16º C)
Sodium Sulfide 70% 70° F (21º C)
Sodium Sulfite 5% 70° F (21º C)
Steam 225° F (107º C)
Steam 300° F (149º C)
Stearic Acid 90% 200° F (93º C)
Steep Water
Styrene (Fumes)
Sulfamic Acid
Sulfur (Molten)
Sulfur Dioxide 60° F (16º C)
Sulfur Trioxide
Sulfuric Acid 0% to 7% 70° F (21º C)
Sulfuric Acid 7% to 40% 70° F (21º C)
Sulfuric Acid 40% to 75% 70° F (21º C)
Sulfuric Acid 75% to 95%
Sulfuric Acid 95% to 100%
Sulfurous Acid 80% 100° F (38º C)

416 SS

E – Excellent
G – Good
F – Fair
U – Unsatisfactory

Seat

Nickel-Plated
Ductile Iron

Rating Interpretation

U
U
U
F
F
F
U
F
U
U
F
U
G
U
U
G
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U

G
G
G
G
G
E
E
F
G
E
F
F
F
G
F
G
F
F
U
G
G
G
G
G
G
G
U
U
G
F
G
G
F
U
U
U
U
U

G
G
G
G
E
E
G
E
E
E
E
E
G
E
E
E
E
E
E
E
E
G
G
E
E
G
F
G
E
G
E
E
E
E
E
E
E
E
E
E
G
E
E
G
U
U
U
U
G

G
U
G
G
E
G
G
E
F
E
G
E
G
E
G
G
E
E
U
G
G
E
G
F
G
G
G
G
G
G
G
G
E
E
G
U
E
F
U
U
U
U
F

E
U
U
F
F
E
U
E
E
E
E
G
E
E
G
G
G
E
U
F
F
F
U
U
U
G
G
U
F
G
G
U
E
G
F
U
F
U
U
U
U
U
U

E
E
E
E
E
E
E
E
E
E
G
E
E
E
E
E
E
E
E
E
E
E
E
G
G
E
E
E
E
E
E
E
E
E
E
E
E
G
G
U
U
E

E
E
E
E
E
E
E
E
E
E
E
E
E
G
E
E
E
E
E
E
E
E
E
E
E
E
G
G
G
E
E

E
E
E
G
E
E
E
E
E
E
E
E
E
E
E
E
E
G
G
E
G
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
G

U
G
E
E
E
E
E
E
E
E
E
F
E
E
E
U
E
G
E
E
E
E
E
E
G
G
G
F
F
G
G
G
E
E
E
E
E
U
U
G
U
U
U
U
U
U
U
U
U
U

U
E
E
E
G
E
E
E
G
G
G
F
E
E
G
U
E
G
E
E
E
E
E
E
F
U
U
U
U
G
G
G
G
E
E
E
E
U
U
G
F
G
U
G
U
U
U
U
U

U
E
E
E
E
G
G
G
G
G
F
E
E
E
E
U
E
U
G
E
E
E
E
G
E
E
G
U
E
E
G
G
E
E
E
E
E
U
U
G
G
E
U
F
U
E
E
G
U
G
E

G
G
U
E
E
G
E
E
E
G
E
E
E
E
G
E
E
U
E
U
E
E
E
E
E
E
G
G
F
U
E
E
E
E
E
E
E
E
E
U
U
E
G
G
G
E
E
E
E
G
G
G
E

F
E
G
E
E
E
E
E
G
E
U
U
E
G
U
E
E
E
G
E
E
E
E
G
E
E
G
G
G
E
E
E
E
E
E
E
E
G
U
G
U
G
F
E
G
U
U
U
U
U
U

U
G
U
E
E
G
E
G
G
U
F
F
F
U
F
E
G
E
E
E
E
G
E
E
G
F
F
G
G
G
E
E
G
G
G
U
U
G
U
U
G
G
U
U
U
U
U
-

U
E
E
E
E
E
E
U
E
E
E
E
G
G
U
E
U
U
F
F
F
U
-

* See material trademark note on page 40.

37

MATERIAL SELECTION GUIDE (CONT.)
Stem and Disc

316 SS

Monel*

Aluminum
Bronze

Alloy 20

Hastelloy C*

PVF

Buna-N

Neoprene

Hypalon*

FKM

EPDM

Natural Rubber

ETM-30230

Tall Oil
Tannic Acid 150° F (66º C)
Tar
Tartaric Acid 150° F (66º C)
Toluol and Toluolene
Toluene Sulfomic Acid
Transformer Oil
Tributyl Phosphate
Trichloroacetic Acid
Trichloroethylene
Triethinolamine
Trisodium Phosphate
Tung Oil
Turpentine
Vinegar 70° F (24º C)
Water, Acid – Mine
Water – Deionized
Water – Demineralized
Water – Fresh 180° F (82º C)
Water – Fresh 225° F (107º C)
Water – Salt 180° F (82º C)
Water – Sewage 80° F (27º C)
Whiskey and Wine
White Liquor
Xylene, Xylol
Zinc Chloride 5% 160° F (71º C)
Zinc Phosphate
Zinc Sulfate 25% 180° F (82º C)

416 SS

E – Excellent
G – Good
F – Fair
U – Unsatisfactory

Seat

Nickel-Plated
Ductile Iron

Rating Interpretation

G
U
F
U
G
G
U
F
U
U
U
U
U
U
U
G
G
U
U
U
U
F
U
U

G
F
E
G
E
F
U
U
U
U
U
U
E
E
U
G
U
E
U
G

E
E
E
E
E
U
E
U
E
E
G
E
E
E
E
E
E
E
E
G
E
E
E
E
F
G
E

G
G
E
G
G
G
G
G
F
G
E
U
E
E
E
E
E
E
G
G

G
E
G
E
G
G
F
E
G
E
E
E
G
E
G
E
U
G

E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
G
E

E
E
E
E
E
E
E
E
E
E
E
E
G
E

E
G
G
G
U
E
F
G
G
E
E
G
G
E
E
E
E
E
E
E
E
E
E

G
E
F
G
U
U
U
G
U
F
F
E
G
G
F
E
E
G
U
G
E
E
G
U
E
E
E

G
G
F
G
U
U
U
U
E
F
G
U
G
F
E
G
U
G
E
U
E
E

G
E
U
U
U
U
E
G
U
E
E
E
E
F
U
F
G
G
U
E
E

E
E
E
E
E
G
E
U
F
E
U
E
E
E
E
E
U
U
U
E
E
E
E
E

E
U
G
U
U
E
G
U
G
U
U
E
F
E
E
E
E
E
E
E
U
E
E
E

E
E
U
E
U
G
F
U
G
U
U
G
F
F
U
U
U
F
U
E
G

F
F
F
U
U
F
F
U
-

* See material trademark note on page 40.

For proper valve repair, use genuine DEMCO replacement parts.

38

Services for Valves and Actuation
WE BUILD IT. WE BACK IT.

Startup and Commissioning
Our experts understand that each project is unique. That’s why Cameron’s service team
helps facilitate commissioning and start-up activities.
•

Integrated solutions, onsite or at our global service centers

•

Increased equipment and product performance

•

The shortest possible trouble-free startup for your critical assets

Spare Parts and Asset Management
Cameron offers the assets and expertise to cover all aspects of valve management.
•

Full inventory of quality exact OEM parts and spares

•

Complete asset risk and criticality assessments

•	Comprehensive inventory of your assets, including a complete recommended
spare valves and parts list

Operational Support
Cameron’s ability to address valve requirements in the field is a reflection of our
commitment to life-of-asset support.
•

Innovative asset management solutions

•

Trouble-free installation, startup and operations

•

Support from commission to operation – extending through all

		
•

phases of a valve’s life cycle
Extensive inventory of spare valves and parts

Cameron’s site management
team helps mitigate the risk of
project delays by identifying
issues in the construction
process prior to valve installation
to ensure valve integrity.

39

Trademark Information
DEMCO is a registered trademark of Cameron.
This document contains references to registered trademarks or product designations,
which are not owned by Cameron.

Trademark

Owner

CELCON

Hoechst Celanese Corporation

DELRIN

E.I. DuPont De Nemours & Company

FLUOREL

Minnesota Mining and Manufacturing Company

HASTELLOY

Haynes International, Inc.

HYCAR

Hydrocarbon Chemical and Rubber Company

HYDRIN

Zeon Chemicals USA, Inc.

HYPALON

E.I. DuPont De Nemours & Company

INCONEL

INCO Nickel Sales, Inc.

MONEL

INCO Alloys International, Inc.

NORDEL

E.I. DuPont De Nemours & Company

STELLITE

Stoody Deloro Stellite, Inc.

TEFLON

E.I. DuPont De Nemours & Company

CERTIFICATIONS

40

41

3250 Briarpark Drive, Suite 300
Houston, TX 77042
USA
Toll Free 1 800 323 9160
Learn more about DEMCO butterfly valves:
www.c-a-m.com/DEMCO
DEMCO@c-a-m.com

ENVIRONME
N
XCELLEN
LE
CE
TA

TH SAFETY
AL
A
HE

ND

CA

HSE Policy Statement
At Cameron, we are committed ethically, financially and personally to a
working environment where no one gets hurt and nothing gets harmed.

MERON

© 2015 Cameron | DEMCO, NAVCO, NUTRON, THORNHILL CRAVER, TOM WHEATLEY, WHEATLEY and WKM are registered trademarks of Cameron.
TECHNO is a trademark of Cameron. Teflon and all brands listed are registered trademarks or trademarks of their respective companies. | SWP 1.5M | 03/15 AD01780V



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