Emerson Fisher Posi Seal A31A Instruction Manual

2015-03-30

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Instruction Manual
Form 5482
February 2005

Cryogenic-Rotary Valve

POSI-SEALr Type A31A Cryogenic High
Performance Butterfly Valve
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Adjusting the Actuator Travel Stops or Travel . 3
Valve Orientation . . . . . . . . . . . . . . . . . . . . . . . . . 3
Preparing for Installation . . . . . . . . . . . . . . . . . . . 4
Installing Wafer-Style Valves . . . . . . . . . . . . . . . 5
Installing Single-Flange Valves . . . . . . . . . . . . . . 6
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Replacing Packing . . . . . . . . . . . . . . . . . . . . . . . . 7
Removing the Valve from the Pipeline . . . . . . . . 8
Removing/Installing the Seal Ring . . . . . . . . . . . 8
NOVEXt Seal Installation . . . . . . . . . . . . . . . . 9
Kel-F and Kel-F/aluminum Seal Installation . 10
Anti-Blowout Protection, Packing,
Valve Shaft(s), Disc, and Bearing
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Installing a One-Piece Shaft . . . . . . . . . . . . . . 14
Installing a Two-Piece Shaft . . . . . . . . . . . . . . 15
Installing the Gasket Retainer . . . . . . . . . . . . 16
Parts Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Introduction
Scope of Manual

Figure 1. Type A31A Cryogenic Valve with
Type 1035 Actuator

No person may install, operate, or maintain a Type
A31A Cryogenic valve without first D being fully
trained and qualified in valve, actuator, and
accessory installation, operation, and maintenance,
and D carefully reading and understanding the
contents of this manual. If you have any questions
about these instructions, contact your Fisher sales
office before proceeding.
Note
Neither Emerson, Emerson Process
Management, nor Fisher assume
responsibility for the selection, use, or
maintenance of any product.
Responsibility for proper selection,
use, and maintenance of any Fisher
product remains solely with the
purchaser and end-user.
D500242X012

This instruction manual provides installation,
maintenance, and parts ordering information for the
POSI-SEALr Type A31A Cryogenic
high-performance butterfly valves (see figure 1). The
Series C (3- through 6-inch Class 150 & 300 and
8-inch Class 150) feature a cast one-piece
extension. The 8-inch Class 300, and 10- through
24-inch Class 150 & 300 designs have a two-piece
extension. For information regarding actuators and
accessories, refer to separate instruction manuals.

W7451 / IL

www.Fisher.com

Instruction Manual
Form 5482
February 2005

Cryogenic-Rotary Valve
Table 1. Specifications

Available Valve Configurations
J Flangeless, wafer-style or J single-flange
(lugged) control valve with a one-piece extension
housing and either NOVEX seal (standard), Kel-F
seal (optional) or Kel-F seal with Aluminum
backup V-ring (optional)
Valve Sizes
J 3, J 4, J 6, J 8, J 10, J 12, J 14, J 16,
J 18, J 20, or J 24-inch
End Connection Style
J Flangeless, wafer-style or J single flange
valve body designed to fit between raised-face
mating flanges per ASME B16.5 Class 150 or 300
Maximum Inlet Pressure/Temperature(1)
Consistent with ANSI Class J 150 and J 300
pressure/temperature ratings per ASME B16.34,
except that 38_C (100_F) rating is applicable to
-254_C (-425_F). NOVEX seal maximum

pressure/temperature rating is the same as the
valve body. See figure 2 for rating of Kel-F seal.
Valve Classification
Face-to-face dimensions are in compliance with
MSS SP68 and API 609 standards; valve bodies
are designed for installation between ASME
B16.5 Class 150 or 300 raised-face flanges
Materials of Construction
See Bulletin 21.1:Cryogenic-Rotary
Installed Valve Orientation
See figure 3 for orientation guidelines
Available Actuators
J Type 1035, J Bettis Pneumatic or J Type
1051/1052
Disc Rotation
Clockwise to close

1. The pressure/temperature limits in this manual, and any applicable code or standard limitation, should not be exceeded.

Description
The Type A31A Cryogenic Series C (3- through
6-inch Class 150 & 300 and 8-inch Class 150) High
Performance Butterfly Valve features either a double
D drive shaft to allow direct coupling to the Type
1035 actuator or keyed shaft (optional). The Type
A31A Cryogenic is a reliable, high-performance
butterfly valve for cryogenic applications.
The Type A31A Cryogenic is available in either a
flangeless (wafer) or a single-flange (lugged) valve
body style and a variety of seals.
The standard seal for the Type A31A Cryogenic
valve is the NOVEXt metal seal which provides
tight shutoff, low operating torques and the
ruggedness required for cryogenic service. Kel-f and
Kel-f/aluminum seals are also available.

Installation
WARNING
Always wear protective gloves,
clothing and eyewear when performing
any installation operations to avoid
injury.
To avoid personal injury or property
damage resulting from the sudden
release of pressure, do not install the
valve assembly where service
conditions could exceed the limits
given in this manual or on appropriate
nameplates. Use pressure-relieving
devices as required by government or
accepted industry codes and good
engineering practices.
Check with your process or safety
engineer for any additional measures
that must be taken to protect against
process media.
If installing into an existing
application, also refer to the WARNING

Instruction Manual
Form 5482
February 2005

Cryogenic-Rotary Valve

at the beginning of the Maintenance
section in this instruction manual.

CAUTION
Responsibility for the safety of
process media and compatibility of
valve materials rests solely with the
purchaser and end-user. When
ordered, the valve configuration and
construction materials were selected
to meet particular pressure, pressure
drop, temperature, and controlled fluid
conditions. Because pressure drop
and temperature range capabilities
limit some combinations of materials,
do not apply any other conditions to
the valves without first contacting your
Fisher sales office.
Before installation check the maximum allowable
inlet pressures for Type A31A Cryogenic valves
shown in figure 2 and the Specifications table.

Adjusting the Actuator Travel Stops
WARNING
The edges of a rotating valve disc have
a shearing effect that may result in
personal injury. To avoid personal
injury, keep clear of the disc edges
when rotating the disc.

from 0.03 to 0.76 mm (0.001 to 0.030 inch) away
from the internal stop in the valve body. This
adjustment is necessary to be certain that the
actuator output torque is fully absorbed by the
actuator travel stop or by the actuator. The internal
travel stop in the valve body should not absorb any
of the actuator torque.
2. Before installing the valve/actuator assembly in
the process line, cycle the valve several times to be
sure the valve disc returns to the proper position.

Valve Orientation
Note
When the process flow is gas, install
the valve with the shaft in the
horizontal position.
When the process flow is liquid the
valve should be installed at an incline
above horizontal of at least 20
degrees, as shown in figure 3. Inclined
installation can enhance valve
performance by preventing direct
cryogenic liquid contact with the
packing.
The Type A31A Cryogenic valve is designed for
installation with the shaft(s) in any orientation around
the pipeline: horizontal, vertical, or at an
intermediate angle. However, when installing the
valve in cryogenic service, follow the
recommendations below, which are based on
application experience:
D Installing the valve with the extension housing
or bonnet four to six inches beyond the cold box
(see figure 3) provides space for slight boil-off of
cryogenic liquids.
D When installed with the extension stem inclined
20 degrees above horizontal, the vapor pocket
resulting from cryogenic liquid boil-off prevents the
colder liquid from contacting the stem packing area.
D Recommended installation for optimum seal
performance of the NOVEX and Kel-F seals is
reverse flow (into the back of the disc).
D A flow tag with an arrow is provided for proper
installation.

Instruction Manual
Form 5482
February 2005

Cryogenic-Rotary Valve

C0759-1 / IL

KEL-F

A4132-1 / IL

CLASS 150, KEL‐F SEAL

A3715-2 / IL

CLASS 300, KEL‐F SEAL

Figure 2. Maximum Pressure/Temperature Ratings

Preparing for Installation
CAUTION
To avoid damage to the valve disc
during installation, the valve must be
in the fully-closed position. If the Type
A31A Cryogenic valve is equipped with
a fail-open actuator, remove the
actuator before installing the
valve/actuator assembly or cycle the
valve into the fully closed position.
Then, take appropriate steps to ensure
that the actuator does not cause the
valve to open during installation.

1. The Type A31A Cryogenic valve is normally
shipped as part of an assembly with an actuator and
other accessories. If the valve and actuator have
been purchased separately or if the actuator has
been removed for maintenance, properly mount the
actuator and adjust valve/actuator travel and all
travel stops before inserting the valve into the line.
Follow the instructions in this manual for Adjusting
Travel stops. Also, refer to a separate actuator
instruction manual for detailed actuator mounting
and adjustment procedures.
2. If not previously removed, remove the protective
end covers from the valve and inspect the valve
body to be certain that it is free of foreign material.
Also, be certain that adjacent pipelines are free of
any foreign material, such as pipe scale or welding
slag that could damage the valve seating surfaces.

Instruction Manual
Form 5482
February 2005

Cryogenic-Rotary Valve

Table 2. Valve Body Data, Class 150
FACE-TOFACE
DIMENSION(1)

Table 3. Valve Body Data, Class 300

APPROXIMATE
WEIGHT

VALVE
SIZE,
INCHES

SHAFT
DIAMETER
AT YOKE
BEARING

47.6

71.4

47.6

71.4

54.0

93.7

54.0

93.7

57.2

147.6

57.2

146.1

63.5

196.9

73.0

186.2

71.4

254.0

85.3

230.1

100

81.0

298.5

94.1

281.7

103

135

330

120

117

305

142

249

102

378

133

182

133

349

213

325

114

429

170

231

149

391

259

434

127

470

210

302

159

442

401

582

154

575

326

455

181

523

512

Single
Flange

Wafer

Kilograms

Inches

FACE-TOFACE
DIMENSION(1)

APPROXIMATE
WEIGHT

VALVE
SIZE,
INCHES

MINIMUM
I.D.(2)

Wafer

Pounds

Single
Flange

Kilograms

Inches

863
Pounds

5/8

1-7/8

2.81

5/8

1-7/8

2.82

3/4

2-1/8

3.69

3/4

2-1/8

3.69

2-1/4

5.81

2-1/4

5.75

2-1/2

7.75

1-1/4

2-7/8

7.32

104

115

1-1/4

2-13/16

10.00

125

148

1-1/2

3-23/64

9.06

176

220

1-1/2

3-3/16

11.75

164

206

1-3/4

3-45/64

11.09

227

298

1-3/16

3-5/8

191

265

1-3/4

4-5/8

314

548

1-1/4

14-7/8

294

401

1-3/4

5-1/4

13-3/4

470

716

1-1/2

4-1/2

16-7/8

374

510

2-1/4

5-7/8

15-3/8

570

956

1-3/4

18-1/2

463

665

2-3/4

6-1/4

17-13/32

884

1282

2-1/4

6-1/16

22-5/8

719

1004

2-3/4

7-1/8

20-19/32

1128

1903

1. Face-to-face dimensions are in compliance with MSS SP68 and API 609
specifications.
2. Minimum I.D. is the minimum pipe or flange I.D. required for disc swing
clearance.

CAUTION

1. Face-to-face dimensions are in compliance with MSS SP68 and API 609
specifications.
2. Minimum I.D. is the minimum pipe or flange I.D. required for disc swing
clearance.

3. Select the appropriate gaskets for the application.
Flat sheet, spiral wound, or other gasket types,
made to ANSI B16.5 group or user’s standard, can
be used on the valves depending on the service
conditions of the application.
4. Refer to table 4 for the quantity and size of flange
bolts required.

The Type A31A Cryogenic valve is
designed for use with the appropriate
piping schedule for the specified ANSI
class. Minimum inside diameters for
flanges or pipe mating with valves are
shown in tables 2 and 3. Be certain to
align the valve accurately to avoid
contact between the disc and the
flanges. Improper alignment or
insufficient space for disc rotation
could result in damage to the disc.
Additionally, be certain that the valve
body and any adjacent pipelines are
free of foreign material, such as pipe
scale or welding slag that could
damage the valve seating surfaces.

Installing Wafer-Style Valves
WARNING
The edges of a rotating valve disc have
a shearing effect that may result in
personal injury. To avoid personal
injury, keep clear of the disc edges
when rotating the disc.
1. See figure 3 for recommended valve orientation.
See table 4 for flange bolt specifications. Install the
lower flange bolts first to form a cradle for the valve.

Instruction Manual
Form 5482
February 2005

Cryogenic-Rotary Valve
Table 4. Hex Head Screw, Stud Bolt and Cap Screw Data (1)
VALVE
SIZE,
INCH

SIZE DIA. INCH &
THREAD

NUMBER
Class
150

Class
300

Class
150

Class
300

LENGTH, INCH
Class
150

Class
300

Wafer Style with Stud Bolts
3

5/8-11

3/4-10

5-3/4

5/8-11

3/4-10

6-1/2

3/4-10

6-1/2

7-1/2

3/4-10

7/8-9

1-8

7/8-9

1-1/8-8

8-1/2

1-1/88

9-1/2

1-1/48

13-1/2

1-1/88

1-1/48

13-3/4

1-1/88

1-1/48

14-1/2

1-1/48

1-1/28

16-1/2

---

1-1/88

---

3-1/2

---

1-1/48

---

3-3/4

---

1-1/48

---

1-1/48

---

1-1/28

---

4-1/2

5/8-11

3/4-10

1-7/8

5/8-11

3/4-10

2-1/4

3/4-10

2-1/2

3/4-10

7/8-9

2-1/4

7/8-9

1-8

2-1/2

7/8-9

1-1/8-8

2-3/4

3-3/8

1-1/8-8

2-3/4

3-1/2

1-1/48

3-3/4

1-1/8-8

1-1/48

3-1/4

1-1/8-8

1-1/48

3-1/2

1-1/48

1-1/28

3-1/2

4-1/2

Note
The optional graphite ribbon packing
and metal bearings are composed of
all conductive material to electrically
bond the shaft to the valve for
hazardous area service, as opposed to
the non-conductive PTFE packing and
bearings.
5. For more information, refer to the Packing
Maintenance section below.

Installing Single-Flange Valves
WARNING

Wafer Style with Cap Screws

Single Flange Style with Cap Screws

1. Thread engagement in accordance with ANSI B31.3 “Chemical Plant and
Petroleum Refinery Piping”.

2. Properly orient the valve according to the specific
application. For optimum performance, install the
valve so that the shaft will be on the high pressure
side of the valve at shutoff (reverse flow). Install the
valve and the gaskets between the flanges into the
cradle formed by the flange bolts.
3. Install the remaining flange bolts, making sure to
center the gaskets on the gasket sealing surfaces of
the flange and valve body.
4. Tighten the flange bolts in an alternating
criss-cross fashion to a torque value of one-fourth of
the final bolting torque. Repeat this procedure
several times increasing the torque value each time
by a fourth of the final desired torque. When the final
torque value has been applied, tighten each flange
bolt again to allow for gasket compression.

The edges of a rotating valve disc have
a shearing effect that may result in
personal injury. To avoid personal
injury, keep clear of the disc edges
when rotating the disc.
1. See figure 3 for recommended valve orientation.
See table 4 for hex head cap screw specifications.
2. Properly orient the valve according to the specific
application. For optimum shutoff, install the valve for
reverse flow.
3. Position the valve between the flanges. Be sure
to leave enough room for the flange gaskets. Install
the lower flange bolts.
4. Select the appropriate gaskets for the application.
Flat sheet, spiral wound, or other gasket types,
made to the ANSI B16.5 group standard or user’s
standard, can be used on the valve depending on
the service conditions of the application. Install the
gaskets and align the valve and the gaskets.
5. Install the remaining bolts.
6. Tighten the flange bolts in an alternating
criss-cross fashion to a torque value of one-fourth of
the final bolting torque. Repeat this procedure
several times increasing the torque value each time
by a fourth of the final desired torque. When you get
to the final torque value, tighten each flange bolt
again to allow for gasket compression.
Note
The optional graphite ribbon packing
and metal bearings are composed of
all conductive material to electrically
bond the shaft to the valve for
hazardous area service, as opposed to
the non-conductive PTFE packing and
bearings.

Instruction Manual
Form 5482
February 2005

Cryogenic-Rotary Valve

Maintenance

COLD BOX
TRANSITION

Valve parts are subject to normal wear and must be
inspected and replaced as necessary. The
frequency of inspection and replacement depends
upon the severity of service conditions.

WARNING
4” - 8” MIN

Avoid personal injury from sudden
release of process pressure. Before
performing any maintenance
operations:

20_ MIN

D Always wear protective gloves,
clothing and eyewear when performing
any maintenance operations to avoid
personal injury.
D Disconnect any operating lines
providing air pressure, electric power,
or a control signal to the actuator. Be
sure the actuator cannot suddenly
open or close the valve.
D Use bypass valves or completely
shut off the process to isolate the
valve from process pressure. Relieve
process pressure on both sides of the
valve. Drain the process media from
either side of the valve.
D Vent the power actuator loading
pressure and relieve any actuator
spring precompression.
D Use lock-out procedures to be
sure that the above measures stay in
effect while you work on the
equipment.
D The valve packing box may
contain process fluids that are
pressurized even when the valve has
been removed from the pipeline.
Process fluids may spray out under
pressure when removing the packing
hardware or packing rings, or when
loosening the packing box pipe plug.
D Check with your process or safety
engineer for any additional measures
that must be taken to protect against
process media.

16B5084 / DOC

Figure 3. Properly Installed Cryogenic Valve

Replacing Packing
The Type A31A Cryogenic valve is designed so the
packing can be replaced without removing the valve
from the process pipeline, provided there is no
internal pressure. Packing may be PTFE V-rings or
graphite.
Key numbers for the parts in this section may be
found in figures 7 and 8.

CAUTION
Tighten the packing flange only
enough to prevent shaft leakage.
Excessive tightening will only
accelerate wear of the packing and
could produce higher torques on the
valve than expected.
Usually, packing leakage can be eliminated by
merely tightening the hex nuts (key 15) located
above the packing flange while the valve is in the
pipeline. However, if leakage continues, replace the
packing.

Instruction Manual
Form 5482
February 2005

Cryogenic-Rotary Valve
CAUTION
Never use a wrench or pliers on the
valve shaft. A damaged shaft could cut
the packing and allow leakage.
1. Before loosening any parts, isolate the valve from
the line pressure, release pressure from both sides
of the valve body, and drain the process media from
both sides of the valve.
2. Then, remove the hex nuts (key 18) and lift off
the packing follower (key 11). The packing (key 13)
is now accessible. Refer to figure 6 for details of the
blowout protection.
3. Use a packing extractor to remove the packing.
Insert the corkscrew-like end of the tool into the first
piece of packing and pull firmly to remove the
packing. Repeat this process until all packing has
been removed.
Note
For valves equipped with non-metallic
(PTFE composition) bearings, perform
the following step to inspect and/or
replace the outboard bearing (key 10).
4. Using a formed hook or probe, carefully remove
the packing ring (key 12) and inspect the outboard
bearing (key 10) for excessive intrusion or wear.
Outboard bearings are only found on the 3- through
12-inch sizes. If necessary, remove the bearing
carefully using needle-nose pliers and install a new
bearing and existing packing ring using the packing
follower (key 11) as a driver.

CAUTION
Be careful when cleaning the packing
box. Scratches to the shaft or inside
diameter of packing bore might cause
leakage.
5. Before installing new packing, clean the packing
box.
6. Install new packing (key 13) one ring at a time,
using the packing follower (key 11) as a driver. If
using split-ring packing, stagger the splits in the
rings to avoid creating a leak path.
7. Reinstall all parts. Tighten the packing follower
nuts (key 18) as needed to stop leakage under
operating conditions.

Removing the Valve from the Pipeline
1. Disconnect any operating lines providing air
pressure, electric power, or a control signal to the
actuator. Be sure the actuator cannot suddenly open
the valve. Vent the power actuator loading pressure.
2. Use bypass valves or completely shut off the
process to isolate the valve from process pressure.
Relieve process pressure on both sides of the valve.
Drain the process media from either side of the
valve.

CAUTION
Damage to the valve disc, piping or
pipe flanges can occur if the disc is
not closed when the valve is being
removed from the pipeline. If
necessary, stroke the actuator to place
the disc in the closed position while
removing the valve from the pipeline.
3. Loosen the flange bolting that holds the valve.
Make sure the valve cannot slip or twist while
loosening and removing the bolting.
4. Make certain the valve disc is closed and remove
the valve from the pipeline. Support the valve
properly and move the valve to an appropriate work
area.

Removing/Installing the Seal Ring
Unless otherwise indicated, key numbers and part
names are listed in figures 7 and 8.
Note
For valves large enough to be safely
placed on a flat surface without
tipping, it is possible to replace the
seal ring (key 7) while the actuator is
mounted to the valve and can be
accomplished by cycling the valve to
90 degrees open.
1. After removing the valve from the pipeline,
remove the manual or power actuator. Manually
rotate the drive shaft (key 4) counterclockwise until
the disc has moved a full 180 degrees away from the
closed position.
2. Lay the valve flat on a work bench in a secure
position with the retaining ring (key 2) and retaining
ring screws (key 19) facing up. Properly secure the
valve on a suitable worktable so it can not slip, twist,
or fall during maintenance. Remove all retaining ring
screws.

Instruction Manual
Form 5482
February 2005

Cryogenic-Rotary Valve

3. Remove the retaining ring by placing a socket
head retaining ring screw from the retaining ring in
each of the two retaining ring jacking screw holes.
Slowly turn the screws until the retaining ring has
been lifted from the valve body. Remove the
retaining ring to expose the seal ring in the T-slot
area of the valve body.

GRAPHITE
GASKET
RETAINING
RING

Note

BODY

HIGH PRESSURE
AT SHUTOFF

SEAL
RING

The Type A31A Cryogenic valve is
available with different seal designs
and components. See figure 4 to
identify the specific seal design.

VALVE DISC

NOVEX SEAL

CAUTION
GRAPHITE
GASKET

To avoid possible leakage, be careful
not to damage the gasket sealing
surface, the seal ring, or the T-slot
area in the valve body while
performing the next two steps.
4. Remove and discard the retaining ring gasket
(key 16). Be careful to not scratch the gasket seating
surface.

RETAINING
RING

BODY

HIGH PRESSURE
AT SHUTOFF

SEAL
RING

5. Insert a regular screw driver or other similar tool
under the top edge of the seal ring (key 7), and
gently pry it out of the T-slot area in the valve body.
Take care not to damage the seal ring or T-slot area
of the valve body. After the seal ring has been
removed, clean the T-slot area, retaining ring, and, if
required, polish the disc thoroughly with fine steel
wool or other appropriate material.

VALVE DISC

KEL‐F SEAL

GRAPHITE
GASKET

NOVEXt Seal Installation

RETAINING
RING

BODY

Unless otherwise indicated, key numbers and part
names are listed in figures 7 and 8. Seal installation
is shown in figure 5.
A maintenance kit with installation tools is available
through your Fisher sales office.
1. Locate the replacement seal ring (key 7) and note
the shape of the ring. The ring is wider across one
edge diameter and narrower across the other edge
diameter. Also, note the wide groove around the
outside circumference.
Before installing the seal ring into the valve body,
place the backup ring, if applicable, (key 8) into the
wide, outer groove of the seal ring.

HIGH PRESSURE
AT SHUTOFF

SEAL
RING

VALVE DISC

16B5083 / DOC

KEL‐F / ALUM SEAL

Figure 4. Available Seal Configurations

Instruction Manual
Form 5482
February 2005

Cryogenic-Rotary Valve
2. Install the seal ring and backup ring assembly in
the valve body. The wider outside diameter of the
seal ring goes into the T-slot area of the valve body
as shown in figure 5. Start the edge with the wider
diameter into the T-slot of the valve body.

9. The final seating of the retaining ring screws can
now be done. For the screw torque values, refer to
table 5.
10. Repeat steps 8 and 9 two more times.
Note

CAUTION
Use extreme care to avoid damaging
the gasket while punching one initial
screw hole through the gasket for
alignment in the following step.
3. Once the seal ring and backup ring have been
fully installed into the valve body T-slot, the retaining
ring gasket can be installed. This gasket is a thin
graphite material. Use extreme care to avoid
damaging the gasket while punching one initial
screw hole through the gasket for alignment.
4. Install the retaining ring, and align the screw
holes in the retaining ring with the holes in the valve
body. Install the first retaining ring screw through the
punched hole in the retaining ring gasket. Install the
other retaining ring screws by pushing them through
the graphite gasket and threading them into the
valve body.
5. Tighten the retaining ring screws just enough to
eliminate any movement of the retaining ring. Do not
over-tighten the retaining ring screws.

WARNING
Avoid personal injury or property
damage caused by the impact of a
falling or tipping valve. Support large
valves during maintenance.
6. To complete this step, stand the valve up.
Support the valve securely using methods
appropriate for the valve size. If a vise or other
clamps are being used, make certain the flange
gasket sealing area of the valve body is not
damaged.
7. Manually rotate the drive shaft (key 4) to turn the
disc clockwise to meet the seal ring.
8. Place a piece of rubber, or other soft material,
between the disc and internal travel stop to protect
the disc. With a rubber mallet, tap the disc until it
contacts the internal travel stop. When the disc
makes contact with the stop, manually rotate the
disc counterclockwise back out of the seal ring to a
90-degree open position.

When attaching the actuator to the
valve, make sure the valve disc is not
in contact with the internal travel stop.
The valve disc should be positioned
from 0.03 to 0.76 mm (0.001 to 0.030
inch) away from the internal stop in the
valve body.

CAUTION
When using an actuator, the actuator
travel stops or the actuator travel (for
actuators without adjustable stops)
must be adjusted so that the disc stop
in the valve body does not absorb the
output of the actuator. Failure to limit
actuator travel as described in the next
step can result in damage to the valve
shaft or other valve parts.
11. Use an appropriate tool (such as a feeler gauge)
and position the disc from 0.03 to 0.76 mm (0.001 to
0.030 inch) away from the internal stop in the valve
body.
This adjustment is necessary to be certain that the
actuator output torque is fully absorbed by the
actuator travel stop or by the actuator. The internal
travel stop in the valve body should not absorb any
of the actuator torque.

Kel-F and Kel-F/Aluminum Seal
Installation
Unless otherwise indicated, key numbers and part
names are listed in figures 7 and 8.
A maintenance kit with installation tools is available
through your Fisher sales office.
1. Locate the replacement seal ring (key 7) and note
the shape of the ring. The ring is wider across one
edge diameter and narrower across the other edge
diameter. Also, note the wide groove around the
outside circumference. If an aluminum backup ring
(key 8) is provided, fit this over the back of the seal
ring (matching seal and backup ring angles) prior to
installation in the valve.

Instruction Manual
Form 5482
February 2005

Cryogenic-Rotary Valve

LARGEST OUTSIDE
DIAMETER (KEY 7)

16B5081 / DOC

Figure 5. Typical Seal Installation
Table 5. Torque Values for Fasteners
RETAINING RING SCREWS

GASKET RETAINING BOLTS

FASTENER NOMINAL
SIZE

NSm

InSlbs

NSm

InSlbs

#10

4.6

4.0

1/4

100

9.2

5/16

220

167

3/8

400

295

NSm

ftSlbs

NSm

ftSlbs

7/16

1/2

112

9/16

161

119

117

5/8

225

166

161

119

3/4

401

296

286

210

7/8

651

480

447

330

976

720

651

480

1-1/8

1356

1000

837

617

Note: These values are based upon standard materials, S66286/Inconel screws and ASTM A193GRB6 bolts. For other special fastener materials, please contact your Fisher sales
office.

2. Install the seal ring, and if applicable back-up
ring, in the valve body by first placing the wider
outside diameter of the seal ring into the T-slot area
of the valve body as shown in figure 5.
3. Once the seal ring has been fully installed into
the valve body T-slot, the retaining ring gasket can
be installed. This gasket is a thin graphite material.
Use extreme care to avoid damaging the gasket
while punching one initial screw hole through the
gasket for alignment.
4. Install the retaining ring, and align the screw
holes in the retaining ring with the holes in the valve
body. Install the first retaining ring screw through the
punched hole in the retaining ring gasket. Install the
other retaining ring screws by pushing them through

the graphite gasket and threading them into the
valve body.
5. Tighten the retaining ring screws just enough to
eliminate any movement of the retaining ring. Do not
over-tighten the retaining ring screws.

Instruction Manual
Form 5482
February 2005

Cryogenic-Rotary Valve

SHAFT
SHAFT
STUD
HEX NUT
PACKING
FOLLOWER

PACKING
FLANGE

HEX NUT

ANTI-BLOWOUT
FLANGE
PACKING RING

STUD
HEX NUT

V-RING PACKING

ANTI-BLOWOUT
SHAFT SHOULDER

OUT’BD BEARING

PACKING
FOLLOWER

SHAFT SHOULDER

TYPICAL PTFE
V-RING
PACKING

A7090 / IL

16B5082 / DOC

3‐ THROUGH 12‐INCH SIZES

14‐ THROUGH 24‐INCH SIZES

Figure 6. Anti-Blowout Protection Detail

appropriate for the valve size. If a vise or other
clamps are being used, make certain the flange
gasket sealing area of the valve body is not
damaged.
7. Manually rotate the drive shaft (key 4) to turn the
disc clockwise to meet the seal ring.
8. Place a piece of rubber, or other soft material,
between the disc and internal travel stop to protect
the disc. With a rubber mallet, tap the disc until it
contacts the internal travel stop. When the disc
makes contact with the stop, manually rotate the
disc counterclockwise back out of the seal ring to a
90-degree open position.
9. The final seating of the retaining ring screws can
now be done. For the screw torque values, refer to
table 5.
10. Repeat steps 7 and 8 two more times.

Note
When attaching the actuator to the
valve, make sure the valve disc is not
in contact with the internal travel stop.
The valve disc should be positioned
from 0.03 to 0.76 mm (0.001 to 0.030
inch) away from the internal stop in the
valve body.

CAUTION
When using an actuator, the actuator
travel stops or the actuator travel (for
actuators without adjustable stops)
must be adjusted so that the disc stop
in the valve body does not absorb the
output of the actuator. Failure to limit
actuator travel as described in the next
step can result in damage to the valve
shaft or other valve parts.
11. Use an appropriate tool (such as a feeler gauge)
and position the disc from 0.03 to 0.76 mm (0.001 to
0.030 inch) away from the internal stop in the valve
body.
This adjustment is necessary to be certain that the
actuator output torque is fully absorbed by the
actuator travel stop or by the actuator. The
internal travel stop in the valve body should not
absorb any of the actuator torque.

Anti-Blowout Protection, Packing,
Valve Shaft(s), Disc, and Bearing
Maintenance
Note
The 10- through 24-inch Class 150
valves and 8- through 24-inch Class
300 valves have a two-piece shaft. The

Instruction Manual
Form 5482
February 2005

Cryogenic-Rotary Valve

shaft with the double D or keyed end is
called the drive shaft.
The 3- through 8-inch Class 150 valves
and 3 through 6-inch Class 300 valves
have a one-piece shaft.

Disassembly

WARNING
The edges of a rotating valve disc (key
3) have a shearing effect that might
result in personal injury. To avoid
personal injury, keep clear of the disc
edges when rotating the disc.

3. Remove the Anti-Blowout Protection (refer to
figure 6). Remove the hex nuts and pull out the
packing follower.
Note
Class 150 and 300 3- through 24-inch
valve sizes have a bearing stop
pressed into the bearing bore of the
valve body below the extension
housing.
Do not attempt to remove the bearing
stop. If the bearing stop needs
replacement, contact your Fisher sales
office for more information.
4. Remove the packing from around the drive shaft.
Note

CAUTION
When removing the actuator from the
valve, do not use a hammer or similar
tool to drive the lever off the valve
shaft. Driving the lever or actuator off
the valve shaft could damage the valve
internal parts.
If necessary, use a wheel puller to
remove the lever or actuator from the
valve shaft. It is okay to tap the wheel
puller screw lightly to loosen the lever
or actuator, but hitting the screw with
excessive force could also damage
internal valve parts.
Never use a wrench or pliers on the
drive shaft. A damaged shaft could cut
the packing and allow leakage.
Unless otherwise indicated, key numbers and part
names are listed in figures 7 and 8.
1. Remove the actuator and valve, as an assembly,
from the pipeline, and then remove the actuator from
the valve.
Note
It is not necessary to remove the
retaining ring and seal ring when
removing the shaft(s) and disc.
2. Secure the valve in an upright position. Rotate
the disc (key 3) 180 degrees counterclockwise from
the fully closed position by manually turning the drive
shaft.

Different valves require slightly
different procedures because different
valve sizes/ pressure classes have
different methods of connecting the
disc and shaft(s). To identify the
proper procedures, refer to the list
below.
D Class 150, 3- through 8-inch
sizes: One-piece shaft with 1 taper key.
D Class 150, 10- and 12-inch sizes:
Two-piece shaft. 1 taper key in the
drive shaft; 1 disc pin in the follower
shaft.
D Class 300, 3- through 6-inch
sizes: One-piece shaft with 1 taper key.
D Class 300, 8- and 10-inch sizes:
Two-piece shaft. 1 taper key in the
drive shaft; 1 disc pin in the follower
shaft.
D Class 300, 12-inch size:
Two-piece shaft with 2 tangential pins
in the drive shaft; 1 disc pin in the
follower shaft.
D Class 150 and 300, 14- through
24-inch sizes: Two-piece shaft with 2
tangential pins in the drive shaft; 1
disc pin in the follower shaft.
5. Proceed as appropriate, using the following
instructions.
For valves with taper key(s), locate the taper
key(s) (key 6) which runs through the drive shaft
boss on the back of the valve disc. Using a pin
punch on the smaller end of the key, drive it out of

Instruction Manual
Form 5482
February 2005

Cryogenic-Rotary Valve
the disc and shaft. Driving a taper key in the wrong
direction will tighten it.
Note
Certain valve sizes may have a taper
key that is arc spot welded in place. To
remove the key, use a punch on the
smaller end of the taper key and drive
it out of the disc and shaft, breaking
the weld.
For valves with tangential pins and/or disc pins,
locate the tangential pins (key 6) in the drive shaft
(key 4) and the disc pin (key 6) in the follower shaft
(key 5).
a. If a maintenance kit is available, use the pin
extractor to remove the disc pins. Select the
correct size pin extractor tip with screws of proper
thread size to match the thread size in the disc
pins. If a maintenance kit is not available, see
steps c and d below.
b. Screw the pin extractor tip into the pin as far
as possible. With an upward, straight sliding
motion, pull out the pin. Repeat the same
procedure for the other pins.
c. Use a threaded rod with an appropriate spacer
and nut as an extractor tool. If using a threaded
rod, choose a rod with threads that fit the inside
thread of the pins. The rod should extend several
inches above the disc when it is screwed into a
pin.
d. After screwing the rod into the pin, slide the
spacer over the rod and pin. Thread the nut onto
the rod and tighten it. As the nut is tightened, the
nut will drive the spacer against the disc. The
increasing force will draw the pin from the disc.
6. Valves with a two-piece shaft have a gasket
retainer and gasket (keys 14 and 15) on the follower
shaft side of the valve. Remove the hex head bolts
and lockwashers (keys 21 and 20) from the gasket
retainer and remove the gasket retainer and gasket
to expose the end of the follower shaft.

into the end of the shaft. Keep the packing box ring
(key 12) which will come out with the drive shaft.

CAUTION
To avoid damage to the disc, seal ring,
and T-slot area, do not force the disc
past the seal or T-slot area. Remove
the disc from the opposite side of the
valve body.
9. After removing the shaft(s), remove the disc and
the thrust bearings (key 28). Do not force the disc
past the seal ring or T-slot area.
10. Remove the journal bearings (key 9). Using a
suitable punch or puller, drive or pull the journal
bearing(s) into the valve body bore from the drive
shaft bearing bore. Do not attempt to remove the
bearing stop. Remove the journal bearing from the
follower shaft bearing bore. Also, remove the
outboard bearing from the extension housing (if
applicable).
11. Inspect the valve body bore, bearings, bearing
bores and packing box for damage.

Installing a One-Piece Shaft
Unless otherwise indicated, key numbers and part
names are listed in figures 7 and 8.
1. Secure the valve in an upright position. Allow for
easy access to the valve body bore. Allow for easy
access to the drive shaft bearing bore.
2. Inspect all parts removed from the valve for wear
or damage. Replace any worn or damaged parts.
Clean the valve body and all parts to be installed
with an appropriate solvent or degreaser.

CAUTION
Premature valve failure and loss of
process control may result if bearings
are improperly installed or are
damaged during installation.

7. Support the valve disc properly, and remove the
follower shaft. Pull the follower shaft from the valve
body. Use a shaft extractor screwed into the puller
hole in the end of the follower shaft.

3. Using caution to prevent damage to the bearing,
insert one journal bearing (key 9) from the valve
body bore into the drive shaft bearing bore until it
hits the bearing stop. When properly installed, a
portion of the journal bearing will extend into the
valve body bore.

8. Support the valve disc properly, and remove the
drive shaft. Pull out the drive shaft (key 4) by
hand-pulling or by using a shaft extractor screwed

4. Insert one journal bearing from the valve body
bore into the shaft bearing bore opposite the journal
bearing installed in step 3. When correctly installed,

Instruction Manual
Form 5482
February 2005

Cryogenic-Rotary Valve

this journal bearing will be flush with the valve body
bore.
5. Insert the outboard journal bearing (key 10) into
the bore on top of the extension housing.
6. Install the valve disc by placing the disc into the
valve body bore so the curved side of the disc
passes through the end of the valve body that does
not contain the T-slot. Align the shaft bore in the disc
with the bearing bores.
7. Insert the drive shaft end opposite the double D
or keyed end into the valve body through the
packing box. Push the shaft through the bearing
stop. Taking care not to dislodge the journal bearing,
push the shaft through the journal bearing and the
valve disc and into the bore on the opposite side of
the valve body.

CAUTION
To avoid damage to the taper key,
tangential pins, disc pins, valve disc,
or shaft(s) resulting from the
application of excessive force, use
appropriate care when driving the key
or pins into the disc hub and shaft(s).
Use the right tool. Do not use
excessive force.
8. Be sure the taper key disc shaft joint is free of oil
or grease. If necessary, remove any excess welding
material from the taper key.
9. Align the taper key hole in the shaft with the holes
in the shaft boss on the disc. Insert the taper key.
Use a flat-end punch to drive the taper key until solid
contact is felt. Measure the depth of the taper key
head for a reference during the following steps.
a. Drive the taper key in farther as follows:

Valve Size, Inches
ANSI Class 150 and 300,
size 3, 4, 6-inch valves, and
8-inch ANSI Class 150 valves

Minimum Depth to Drive
Taper key After Initial Solid
Contact, mm (Inches)
5 (0.188)

b. The disc, shaft, and taper key assembly must
be inspected to verify that the taper key spans
the entire shaft flat width. If so, this procedure is
complete. If not, the taper key must be driven in
farther until this condition is satisfied. However,
do not exceed the following depth limits:

Valve Size, Inches

Maximum Allowable Depth to
Drive Taper key After Initial
Solid Contact, mm (Inches)

3, and 4-inch ANSI Class 150/300

7 (0.281)

6-inch ANSI Class 300, and 8-inch
ANSI Class 150

8 (0.312)

10. After driving the taper key in place, arc spot
weld the head of the taper key to the disc. For valve
sizes 3-, 4-, and 6-inch, use an arc spot weld bead
of 1/8-inch diameter. For valve sizes 8-, 10-, and
12-inch sizes, use an arc spot weld bead of
3/16-inch diameter.
11. Install the packing as described in the Packing
Replacement section.

Installing a Two-Piece Shaft
Unless otherwise indicated, key numbers and part
names are listed in figures 7 and 8.
1. Secure the valve in an upright position. Allow for
easy access to the valve body bore. Allow for easy
access to the drive shaft bearing bore and the
follower shaft bearing bore.
2. Inspect all parts removed from the valve for wear
or damage. Replace any worn or damaged parts.
Clean the valve body and all parts to be installed
with an appropriate solvent or degreaser.

CAUTION
Premature valve failure and loss of
process control may result if bearings
are improperly installed or are
damaged during installation.
3. Using caution to prevent damage to the bearings,
insert the required number of journal bearings (key
9) from the valve body bore into the drive shaft
bearing bore. When properly installed, one end of
the journal bearing(s) will be flush with the interior
end of the extension housing, the other end of the
journal bearing(s) will be flush with the valve body
bore.
The drive shaft thrust bearing (key 28) will be
installed in step 6.
4. Insert one journal bearing from the valve body
bore into the follower shaft bearing bore so it is flush
with the valve body bore.
5. Insert the outboard journal bearing (key 10) into
the bore on top of the extension housing.
6. Insert the drive shaft into the valve body through
the extension housing . Push the drive shaft through

Instruction Manual
Form 5482
February 2005

Cryogenic-Rotary Valve
the journal bearing(s). Hold the drive shaft thrust
bearing (key 28) in the valve body bore against the
opening of the drive shaft bearing bore. Push the
drive shaft through the bearing bore just enough to
hold the thrust bearing.
7. Insert the follower shaft through the bore in the
valve body uncovered by removal of the gasket
retainer. Hold the follower shaft thrust bearing (key
28) in the valve body bore against the opening of the
follower shaft bearing bore. Push the follower shaft
through the bearing bore just enough to hold the
thrust bearing.
8. Install the valve disc. Place the flat side of the
disc on a flat surface. Then, move the valve body
from its upright position and suspend the valve body
over the disc so the seal ring/T-slot area is facing up.
Align the shaft bores through the disc with the drive
shaft and follower shaft bores. Lower the valve body
over the disc using caution not to dislodge or
damage the thrust bearings placed on the ends of
the shafts.
9. With the valve disc properly positioned in the
valve body, push the drive shaft and follower shaft
the rest of the way through the thrust bearings and
into the shaft bores in the valve disc.
10. Align the holes in the shafts with the holes in the
disc.

CAUTION
To avoid damage to the taper key,
tangential pins, disc pins, valve disc,
or shaft(s) resulting from the
application of excessive force, use
appropriate care when driving the key
or pins into the disc hub and shaft(s).
Use the correct tool, and do not use
excessive force.
11. Before installing the taper key, be sure the taper
key disc shaft joint is free of oil or grease. If
necessary, remove any excess welding material
from the taper key.
12. Install the appropriate taper key, tangential pins,
and disc pins. Install the taper key by aligning the
taper key hole in the shaft with the holes in the shaft
boss on the disc. Insert the taper key. Use a pin
punch to drive the taper key until solid contact is felt.
Measure the depth of the taper key head for a
reference during the following steps.
a. Drive the taper key in farther as follows:

Valve Size, Inches

Minimum Depth to Drive
Taper key After Initial Solid
Contact, mm (Inches)

8-inch ANSI Class 300, 10- and
12-inch ANSI Class 150, and 10-inch
ANSI Class 300 valves

6 (0.219)

Valve Size, Inches

Maximum Allowable Depth to
Drive Taper key After Initial
Solid Contact, mm (Inches)

8-inch ANSI Class 300, and
10- and 12-inch ANSI Class 150

10 (0.375)

10-inch ANSI Class 300

11 (0.406)

13. After driving the taper key in place, arc spot
weld the head of the taper key to the disc. For valve
sizes 8-, 10- and 12-inch, use an arc spot weld bead
of 3/16-inch in diameter.
14. Install the packing as described in the Packing
Replacement section.

Installing the Gasket Retainer
Valves with a two-piece shaft use a gasket retainer
and gasket to cover the follower shaft opening in the
valve body.
1. Replace the gasket (key 15) and gasket retainer
(key 14) over the end of the follower shaft. Use a
new gasket.
2. Replace the four hex head bolts (key 21) and
lockwashers (key 20) to hold the gasket retainer in
place.
3. Be sure to center the gasket over the follower
shaft bore before retightening the bolts. Tighten
down the bolts evenly in a crossover or star pattern.
Refer to table 5 for proper torque values.

Instruction Manual
Form 5482
February 2005

Cryogenic-Rotary Valve
Key
7*

Parts Ordering
When corresponding with your Fisher sales office
about the Type A31A Cryogenic valve, always
provide the valve serial number. For valve/actuator
combinations assembled at the factory, the valve
serial number is stamped on the nameplate attached
to the actuator. For parts information on the 14through 24-inch sizes, please contact your
Fisher sales office.
Note
Use only genuine Fisher replacement
parts. Components that are not
supplied by Fisher should not, under
any circumstances, be used in any
Fisher valve, because they will void
your warranty, might adversely affect
the performance of the valve, and
might jeopardize worker and
workplace safety.

Note
Neither Emerson, Emerson Process
Management, nor Fisher assume
responsibility for the selection, use, or
maintenance of any product.
Responsibility for proper selection,
use, and maintenance of any Fisher
product remains solely with the
purchaser and end-user.

Parts List
Note
10*
Part numbers are shown for recommended spares
only. For part numbers not shown, contact your
Fisher sales office.
Key
1

2
3
4
5
6*

Description
Valve Body
If you need a valve body as a replacement
part, order by valve size, serial number, and
desired material. Contact your Fisher sales
office for assistance.
Retaining Ring
Disc
Shaft
Follower Shaft (8-inch size, Class 300 only)
Taper Key
3 & 4-inch
6-inch
8-inch Class 150
8-inch Class 300

*Recommended spare parts

Part Number

11
12*
12B9530X012
12B9531X012
12B9531X012
12B9532X012

Description
Part Number
Seal Ring
3-inch
Kel-F
V152339X012
Kel-F w/ backup ring
V160696X012
NOVEX S31600, Class 150
V158982X042
NOVEX Nit 60, Class 300
V158982X052
4-inch
Kel-F
V152340X012
Kel-F w/ backup ring
V155891X012
NOVEX S31600, Class 150
V158984X042
NOVEX Nit 60, Class 300
V158984X052
6-inch
Kel-F
V152341X012
Kel-F w/ backup ring
V156065X012
NOVEX S31600, Class 150
V158987X042
NOVEX Nit 60, Class 300
V158987X052
8-inch
Kel-F, Class 150
V152342X012
Kel-F, Class 300
V114263X012
Kel-F w/ backup ring, Class 150
V159653X012
Seal Ring (continued)
8-inch
Kel-F w/ backup ring, Class 300
V153418X012
NOVEX S31600, Class 150
V158992X022
NOVEX Nit 60, Class 300
V163822X012
Backup Ring, Aluminum
3-inch
V160709X012
4-inch
V155890X012
6-inch
V156066X012
8-inch, Class 150
V159654X012
8-inch, Class 300
V153419X012
Bearing, Journal (2 req’d) (4 req’d for 8-inch Class 300)
PTFE
3-inch
V166484X062
4-inch
V153101X012
6-inch
V166462X072
8-inch, Class 150
V167379X062
8-inch, Class 300
V166460X072
Bronze
3-inch
V166484X022
4-inch
V166485X022
6-inch
V166462X032
8-inch, Class 150
V167379X052
8-inch, Class 300
V166460X052
Bearing, Outboard
PTFE
3-inch
16B3488X012
4-inch
16B3574X012
6-inch
16B3748X012
8-inch, Class 150
16B3748X012
8-inch, Class 300
16B3991X012
Bronze
3-inch
16B3488X022
4-inch
16B3574X022
6-inch
16B3748X022
8-inch, Class 150
16B3748X022
8-inch, Class 300
16B3991X022
Packing Follower, SST
Packing Box Ring
3-inch
16A6083X012
4-inch
16A6084X012
6-inch
16A6085X012
8-inch, Class 150
16A6085X012
8-inch, Class 300
16A6086X012

Instruction Manual
Form 5482
February 2005

Cryogenic-Rotary Valve
Key
13*

13*

14
15*
16*

Description
Packing Set, PTFE
3-inch
4-inch
6-inch
8-inch, Class 150
8-inch, Class 300
Packing Ring, graphite (4 req’d)
3-inch
4-inch
6-inch
8-inch, Class 150
8-inch, Class 300
Packing Washer, graphite (3 req’d)
3-inch
4-inch
6-inch
8-inch, Class 150
8-inch, Class 300
Gasket Retainer
8-inch, Class 300 and larger
Gasket
8-inch, Class 300 only
Retaining Ring Gasket
3-inch
4-inch
6-inch
8-inch, Class 150
8-inch, Class 300

Part Number
1R5795X0012
12A8995X022
12A8832X022
12A8832X022
12A8951X022
12A9131X012
12A9136X012
12A9137X012
12A9137X012
12A9138X012
14A9771X012
14A8363X012
14A8365X012
14A8365X012
14A8366X012

Key
17
18
19
20*
21
22
23
24
25
26
27

28*

29
V124605X012
V143529X012
V143494X012
V143458X012
V143656X012
V143657X012

Description
Stud (2 req’d)
Hex Nut (2 req’d)
Retaining Ring Screw
Lock Washer
8-inch, Class 300 only
Hex Head Bolt
8-inch, Class 300 and larger
Pipe Plug, optional
Nameplate (not shown)
Drive Screw (2 req’d) (not shown)
Flow Direction Arrow (not shown)
Assembly, Disc/Shaft
Key
3-inch
4-inch
6-inch
8-inch
Thrust Bearing (2 req’d) (not shown)
8-inch, Class 300 only, PTFE
8-inch, Class 300 only, Bronze
Key Retainer Bolt
3- & 4-inch
6- & 8-inch
Key Retainer Washer
3- & 4-inch
6-inch
8-inch

*Recommended spare parts

Part Number

T10226X0012

Contact factory
V146070X012
V146071X012
V146072X012
V146072X012
V166461X062
V166461X022
V110745X012
V115603X012
V128487X012
V153099X012
V1115723X012

Instruction Manual
Form 5482
February 2005

Cryogenic-Rotary Valve

16B5086 / DOC

Figure 7. Type A31A Cryogenic 3 through 12-inch Typical Assembly

Instruction Manual
Form 5482
February 2005

Cryogenic-Rotary Valve

ASSEMBLY

16B5085 / DOC
16B5087 / DOC

Figure 7. Type A31A Cryogenic 3 through 12-inch Typical Assembly (continued)

Instruction Manual
Form 5482
February 2005

Cryogenic-Rotary Valve

ANTI-BLOWOUT
FLANGE

ANTI-BLOWOUT
FLANGE NUT

B2388/IL

Figure 8. 14- through 24-Inch Type A31A Cryogenic Valves (Wafer Style Shown)
(Shown without 2-piece Extension Housing)

Instruction Manual

Cryogenic-Rotary Valve

Form 5482
February 2005

Instruction Manual
Form 5482
February 2005

Cryogenic-Rotary Valve

Instruction Manual

Cryogenic-Rotary Valve

Form 5482
February 2005

POSI-SEAL, NOVEX, and Fisher are marks owned by Fisher Controls International LLC, a member of the Emerson Process Management business division of Emerson Electric Co. The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property
of their respective owners.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they
are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability.
We reserve the right to modify or improve the designs or specifications of such products at any time without notice.
Neither Emerson, Emerson Process Management, nor Fisher assume responsibility for the selection, use or maintenance of any product. Responsibility
for proper selection, use and maintenance of any Fisher product remains solely with the purchaser and end-user.

Emerson Process Management
Fisher
Marshalltown, Iowa 50158 USA
Cernay 68700 France
Sao Paulo 05424 Brazil
Singapore 128461
www.Fisher.com
24
EFisher
Controls International LLC 1999, 2005; All Rights Reserved

Printed in USA

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Emerson Fisher Posi Seal A31A Instruction Manual

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