Emerson Process Management 667 Users Manual

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2015-02-06

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Instruction Manual
Form 1432
December 2007

667 Size 80 and 100 Actuators

Type 667 Diaphragm Actuators
Size 80 and 100
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . 1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Maximum Pressure Limitations . . . . . . . . . . . . . 3
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Actuator Mounting . . . . . . . . . . . . . . . . . . . . . . . . 4
Loading Connection . . . . . . . . . . . . . . . . . . . . . . . 4
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Size 80 Actuator Spring . . . . . . . . . . . . . . . . . . . 5
Travel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Spring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Size 100 Actuator Spring . . . . . . . . . . . . . . . . . 5
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Size 80 Actuator Maintenance . . . . . . . . . . . . . . 7
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Size 100 Actuator Maintenance . . . . . . . . . . . . 10
For Actuators without the
Top-Loaded Option . . . . . . . . . . . . . . . . . . . 11
For Actuators with the
Top-Loaded Option . . . . . . . . . . . . . . . . . . . 14
Size 80 Side-Mounted Handwheel . . . . . . . . . 16
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Size 80 Hydraulic Snubber . . . . . . . . . . . . . . . . 17
Size 100 Top-Mounted Handwheel
(Adjustable Up Travel Stop) . . . . . . . . . . . . 17
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Parts Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Parts Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Note

Figure 1. Size 80 Type 667 Actuator

Introduction
Scope of Manual
This instruction manual provides information on
installation, adjustment, maintenance, and parts
ordering for the Type 667 actuator in sizes 80 and
100 (figure 1). Refer to separate instruction manuals
for information about other equipment and
accessories used with these actuators.

D100311X012

Neither Emerson, Emerson Process
Management, nor any of their affiliated
entities assumes responsibility for the
selection, use and maintenance of any
product. Responsibility for the
selection, use, and maintenance of any
product remains with the purchaser
and end-user.

W1950 / IL

www.Fisher.com

Instruction Manual
Form 1432
December 2007

667 Size 80 and 100 Actuators
Table 1. Specifications
ACTUATOR SIZE

SPECIFICATION
Nominal Effective Diaphragm Area
Yoke Boss Diameters
Acceptable Valve Stem Diameters
Maximum Allowable Output Thrust
Maximum Travel

Maximum Casing Pressure for Actuator Sizing(3)

Maximum Excess Diaphragm Pressure(4)

Maximum Diaphragm Casing Pressure(5)(6)

Material Temperature Capabilities

100

cm2

1761

2902

inch2

273

127

inch

5H(1)

25.4 or 31.8

31.8

50.8

inch

1 or 1-1/4

1-1/4

62,942

200,170

1.
2.
3.
4.
5.
6.

14,150(2)

45,000

102

inch

Cast Iron

Steel

bar

3.1

4.9

6.9

psig

100

Cast Iron

Steel

bar

1.4

1.7

psig

Cast Iron

Steel

bar

4.1

5.5

7.9

psig

115

–40 to 82

–40 to 180
1/4 NPT internal

284

544

626

1200

Heavy actuator-to-bonnet bolting.
88,075 N (19,800 lb) for steel construction.
Maximum diaphragm casing pressure that can be applied to cause travel stop contact. Indicated pressure must not be exceeded at less than full travel.
Maximum additional diaphragm casing pressure that can be applied after the travel stop cap screw contacts the upper diaphragm casing.
The sum of the pressure required to stroke the valve fully and the excess pressure added when the actuator is against the stop must not exceed these values.
This maximum casing pressure is not to be used for normal operating pressure. Its purpose is to allow for typical regulator supply settings and/or relief valve tolerances.

Do not install, operate, or maintain Type 667
actuators 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 Emerson Process
Managementt sales office before proceeding.

Description
The Type 667 actuator is a reverse-acting actuator.
Reverse-acting actuators use air action to lift the
diaphragm (away from the valve), and spring action
opposes the diaphragm action (see figure 2). The
actuator position changes in response to varying
controlled air pressure to the diaphragm. If air
pressure is reduced or lost from the actuator

178

Pressure Connections
Approximate Weights Without Handwheel

450

diaphragm, spring action will extend the actuator
stem. The actuator is often used with control valves
using a pneumatic positioner for air pressure control,
and where fail action will fully open or close the
control valve as the actuator stem extends.

Also, the actuator can be furnished with either a
side-mounted (size 80 only) handwheel assembly or
a top-mounted handwheel (adjustable up travel stop)
(size 100 only). The size 80 side-mounted
handwheel is normally used as an auxiliary manual
actuator. The size 100 top-mounted handwheel is
used as either a travel stop or an auxiliary manual
actuator.

The actuator can be furnished with a top-loading
capability. A top-loaded actuator allows air pressure
to be applied to the top of the diaphragm, aiding the
spring to extend the actuator stem. This air pressure

Instruction Manual
Form 1432
December 2007

667 Size 80 and 100 Actuators
diaphragm plate contacts the travel stop, damage to
the stem or other parts might result.

DIAPHRAGM
AIR
LIFTS

SPRING
PUSHES
DOWN

ACTUATOR
STEM
AF3833-A
A6127 / IL

TYPE 667 REVERSEĆACTING DIAPHRAGM ACTUATOR

Figure 2. Schematic Representation of Type 667 Actuator

increases valve seat load on valve applications
where additional seat-loading is necessary.

Specifications
Refer to table 1 for Specifications of the Type 667
actuator. See the actuator nameplate for information
about a specific actuator.

WARNING
To avoid personal injury or parts
damage, do not exceed the Maximum
Pressures listed in table 1. Exceeding
any of the maximum pressures can
result in uncontrolled movement of
parts, damage to actuator parts and
the control valve, and loss of control
of the process. Use pressure-limiting
or pressure-relieving devices to
prevent cylinder pressure from
exceeding these limits.

Maximum Pressure Limitations
The casing and diaphragm of Type 667 actuators
are pressure operated. This air pressure provides
energy to compress the spring, to stroke the
actuator, and to seat the valve. The following
explanations describe the maximum pressure limits
for an actuator. Refer to table 1 for maximum values.
D Maximum Casing Pressure for Actuator
Sizing: This is the maximum pressure that can be
applied at less than full travel of the actuator. If this
stroking pressure is exceeded before the upper

D Maximum Excess Diaphragm Pressure:
Additional pressure may be added when the actuator
is at full travel. If the Maximum Excess Diaphragm
Pressure is exceeded, damage to the diaphragm or
diaphragm casing might result.
Because the actuator has traveled its specified
travel, and the diaphragm head is physically stopped
from movement, the energy from any additional air
pressure is transmitted to the diaphragm and
diaphragm casings. The amount of air pressure that
can be added once the actuator has traveled to the
stops is limited by the resultant adverse effects that
may occur. Exceeding this limiting factor could result
in leakage or casing fatigue due to the deformation
of the upper diaphragm casing.
D Maximum Diaphragm Casing Pressure: If the
Maximum Diaphragm Casing Pressure is exceeded,
damage to the diaphragm, diaphragm casing, or
actuator might result. For some actuator sizes, the
maximum casing pressure is the sum of the
maximum stroking pressure added to the maximum
excess pressure. For other actuator sizes, the value
is lower than the sum of the two pressures.

Installation
WARNING
To avoid personal injury or parts
damage, do not exceed the Maximum
Diaphragm Casing Pressure listed in
table 1. The Maximum Diaphragm
Casing Pressure must not produce a
force on the actuator stem greater than
the maximum allowable actuator
output thrust or the maximum
allowable stem load.
Always wear protective gloves,
clothing, and eyewear when
performing any installation operations
to avoid personal injury.
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
at the beginning of the Maintenance
section in this instruction manual.

Instruction Manual
Form 1432
December 2007

667 Size 80 and 100 Actuators
When an actuator and valve are shipped together,
the actuator is normally mounted on the valve.
Follow the valve instructions when installing the
control valve in the pipeline. If the actuator is
shipped separately or if it is necessary to mount the
actuator on the valve, perform the following Actuator
Mounting procedures.
For information on mounting valve positioners, refer
to the appropriate valve positioner instruction
manual.

Actuator Mounting
1. Mount the actuator on the valve bonnet. Insert
the cap screws and tighten the hex nuts, securing
the actuator to the bonnet.
2. Screw the valve stem jam nuts (key 69, figures 6
and 7) all the way onto the valve stem threads.
3. Connect an air supply to the lower diaphragm
casing connection.
4. For push-down-to-close valves, be sure the valve
plug is on its seat. Reduce loading pressure to
ensure that the actuator stem is fully extended.
Apply slight loading pressure to retract the stem
approximately 3.2 mm (1/8-inch).
5. For push-down-to-open valves, apply pressure to
ensure that the actuator stem is fully retracted. Be
sure the valve plug is on its seat. On large valve
sizes, this may require the use of a pry bar inserted
through the valve body line opening. If the valve is
installed in a pipeline, the bottom flange (if one is
used) can be removed and the valve plug pushed to
the seat from the bottom opening. Reduce actuator
loading pressure to extend the stem approximately
3.2 mm (1/8-inch).

CAUTION
Incomplete engagement of either the
valve stem or actuator stem in the
stem connector can result in stripped
threads or improper operation. Be sure
that the length of each stem clamped
in the stem connector is equal to or
greater than the diameter of that stem.
6. Clamp the actuator and valve plug stems
between the two stem connector halves (key 31,

figures 6 and 7). Insert and tighten the stem
connector cap screws.
7. Thread the stem locknuts against the stem
connector.
8. Align the travel indicator scale (key 32, figures 6
and 7) to show valve position.

WARNING
To avoid personal injury due to the
sudden, uncontrolled movement of
parts, do not loosen the cap screws
when the stem connector has spring
or loading pressure force applied to it.

Loading Connection
Key number locations are shown in figures 6 and 7,
unless otherwise directed.
1. Connect the loading pressure piping to the
connection in the size 80 spring case adaptor
(key 89) or in the size 100 lower diaphragm casing
(key 67).
For top-loaded actuators
1. For size 80, remove the the pipe bushing
(key 78), and connect the loading pressure piping in
its place. For size 100, remove the hex bushing
(key 62) from the upper casing (key 1), and connect
the top loading pressure piping in its place.
2. Remove the 1/4-inch bushing (key 92, figure 6;
key 62, figure 7) to increase connection size, if
necessary. The connection can be made with either
piping or tubing.
3. Keep the length of tubing or piping as short as
possible to avoid transmission lag in the control
signal. If an accessory (such as a volume booster or
valve positioner) is used, be sure that the accessory
is properly connected to the actuator. Refer to the
positioner instruction manual as necessary.
4. Cycle the actuator several times to check that the
valve stem travel is correct and that the travel occurs
when the correct pressure range is applied to the
diaphragm.
5. If valve stem travel is incorrect, refer to the Travel
procedure in the Adjustments section.
6. If the spring pressure range is incorrect, refer to
the Spring procedure in the Adjustments section.

Instruction Manual
Form 1432
December 2007

667 Size 80 and 100 Actuators
Monitor loading pressure carefully when making
adjustments. Do not exceed the pressure
specifications of either the loading regulator or the
actuator casings.

Adjustments
Travel
Make travel adjustments when the motion observed
during actuator travel is different from the travel
stamped on the actuator nameplate. If the Actuator
Mounting procedure was followed correctly, this
adjustment should not be necessary.

Each actuator spring has a fixed pressure span.
Changing the spring compression shifts the span up
or down to make valve travel coincide with the
loading pressure range.

When adjusting travel of a direct-acting valve, put a
slight pressure on the actuator diaphragm. This
moves the valve plug off the seat, reducing the
chance of damaging the valve plug or seat during
adjustments.

Size 80 Actuator Spring

1. Back the stem jam nuts (key 69, figures 6 and 7)
away from the stem connector (key 31, figures 6
and 7), and slightly loosen the stem connector cap
screws.

CAUTION
Do not use wrenches or other tools
directly on the valve stem. Damage to
the stem surface and subsequent
damage to the valve packing may
result.
2. Tighten the locknuts together, using a wrench,
then screw the valve stem either into the stem
connector to lengthen travel or out of the stem
connector to shorten travel.
3. Cycle the actuator to check for the specified
travel. If actual travel is not equal to the specified
travel, adjust and check travel until correct. Tighten
the stem connector cap screws when correct travel
is obtained.
4. Raise the travel indicator disk by threading the
stem locknuts against the stem connector.

Spring
Make spring adjustments when the loading pressure
range applied to achieve specified travel is not equal
to the pressure range stamped on the actuator
nameplate. Refer to the Bench Set pressure range
on the nameplate when the valve contains no
pressure and the packing is loosely inserted in the
bonnet. Refer to the Maximum Allowable Supply
pressure on the nameplate when the valve is
controlling the specified pressure drop, and the
packing is tightened to stop leaks around the stem.

Note
Before turning the spring adjuster on
size 80 actuators, assemble the stem
connector around the actuator stem
and the anti-rotating lug on the yoke.
Mark the actuator stem as a visual
reference to verify that stem rotation
does not occur. Remove the stem
connector before rechecking the
bench set.
Remove the cover band (key 87, figure 6), insert a
rod of approximately 12.7 mm (1/2 inch) diameter
into a hole in the spring adjustor (key 74, figure 6),
and rotate the spring adjustor with the rod. Rotating
the adjustor from left to right will increase the loading
pressure required to start actuator stem travel;
opposite rotation will decrease the pressure required
to start travel.

Size 100 Actuator Spring

CAUTION
The actuator must be in the vertical
position when adjusting the spring to
avoid damage to the thrust bearing
(key 86, figure 7) and to properly
position the spacers required for
adjustment.
Remove the shroud plate (key 65, figure 7), and
loosen the jam nut (key 26, figure 7).
For small spring forces, adjustments can be made
by rotating the adjusting nut (key 25, figure 7).
Counterclockwise rotation (when viewed from the
diaphragm casings) of the adjusting nut will increase
the loading pressure required to start actuator stem
travel, and clockwise rotation will decrease the
pressure required to start travel. Tighten the jam nut
when adjustment is complete.

Instruction Manual
Form 1432
December 2007

667 Size 80 and 100 Actuators
For high spring forces, it is necessary to use
spacers between the bottom of the yoke and the
spring seat to isolate spring force from the adjusting
nut.

WARNING

SPRING SEAT

To avoid personal injury from the
compressed actuator spring snapping
back to its original length, make and
use the spacers by following the
instructions in the steps below.

1. It is recommended that three spacers be made of
three-inch schedule 80 pipe cut to the appropriate
length specified in step 2. If other than the
recommended material is to be used, be certain that
the spacers are capable of withstanding the spring
force involved. The spacers must also be of equal
length with ends cut squarely.
2. Measure dimension B as shown in figure 3. Cut
the length of the spacers as follows:
a. If it is desired to decrease spring compression,
make the spacers approximately 4.8 mm
(3/16-inch) longer than dimension B.
b. If it is desired to increase spring compression,
make the spacers approximately 4.8 mm
(3/16-inch) shorter than either dimension B plus
the amount of adjustment required or dimension
B plus valve travel, whichever is less.
3. Whenever the total amount of adjustment
required is greater than valve travel, the adjustment
must be made in two or more steps, and the amount
of adjustment taken in each step must be less than
valve travel.
4. Pressure the actuator to attain full travel.
Cautiously insert the spacers at equal intervals
around the spring seat (key 19, figure 7). Spacers
must be seated squarely, or they may slip out of
position. Keeping hands and tools away from the
spring and spring seat, slowly decrease loading
pressure until the spring force holds the spacers
firmly between the spring seat and the bottom of the
yoke.
5. Loosen the jam nut. The adjusting nut can now
be rotated counterclockwise (when viewed from the
diaphragm casings) to increase the loading pressure
required to start actuator stem travel or clockwise to
decrease the pressure required to start travel.

ADJUSTING NUT

JAM NUT

50A2627-C
A1007-1 / IL

Figure 3. Dimension B for Spring Adjustment

6. Pressure the actuator to move the spring seat
away from the spacers, and carefully remove the
spacers.
7. Slowly reduce the air pressure to the actuator.
Make sure that the thrust bearing (key 86) is
correctly seated in the spring seat before contact
with the adjustment nut (key 25) is made.
8. If the total adjustment required was greater than
valve travel, repeat the procedure. It will be
necessary to make new spacers using the new
dimension B and the remaining adjustment required
or valve travel, whichever is less. Tighten the jam
nut when adjustment is complete.

Maintenance
WARNING
Avoid personal injury or property
damage from sudden release of
process pressure or bursting of parts.
Before performing any maintenance
operations:
D Always wear protective gloves,
clothing, and eyewear when
performing any maintenance
operations to avoid personal injury.

Instruction Manual
Form 1432
December 2007
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 from both sides of
the valve. Drain the process media
from both sides 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.

Size 80 Actuator Maintenance
For size 80 actuators, refer to figure 4 for part names
and locations. Key number locations for size 80
actuators are shown in figure 6.

Disassembly
1. Isolate the control valve from the line pressure,
release pressure from both sides of the valve, and
drain the process media from both sides of the
valve. Shut off all pressure lines to the power
actuator, release all pressure from the actuator. Use
lock-out procedures to be sure that the above
measures stay in effect while you work on the
equipment.
2. Remove the tubing or piping from the connection
in the top of the spring case adaptor (key 89).
3. If the actuator has a handwheel, rotate the
handwheel to relieve all spring compression.

667 Size 80 and 100 Actuators
4. Remove the cover band (key 87). Insert a steel
rod of approximately 12.7 mm (1/2-inch) diameter
into a hole in the spring adjustor (key 74), and rotate
the spring adjustor from right to left until spring
compression is relieved.

WARNING
To avoid personal injury due to the
sudden, uncontrolled movement of
parts, do not loosen the cap screws on
the stem connector (key 31) when
spring force is applied.
5. If necessary, the entire actuator assembly may
be removed from the valve by unscrewing the cap
screws from the stem connector (key 31) and
removing actuator-to-bonnet bolting.
6. Unscrew the diaphragm casing cap screws and
nuts (keys 13 and 14), and lift off the upper
diaphragm casing (key 1).
7. Unscrew the diaphragm cap screw (key 12),
remove the spacer, upper diaphragm plate,
diaphragm, and lower diaphragm plate (keys 2, 4, 3,
and 71).
Note
Standard and top-loaded
constructions use the same key
numbers for parts. The parts look
different, but they use the same
assembly and disassembly sequence.
See figure 4, Size 80 Actuator
Construction for location of parts.
8. Unscrew the cap screws (key 30), and remove
the lower diaphragm casing (key 64).
9. For actuators without a snubber:
a. Unscrew the spring case adaptor cap screws
and nuts (keys 90 and 91), and remove the
adaptor (key 89) from the actuator.
b. Remove the snap ring and seal bushings
(keys 72 and 7). Inspect, and if necessary, obtain
a replacement seal bushing (key 7). Replace the
seal bushing O-rings (keys 8 and 9) as required.
Lubricate with lithium grease (key 237) lubricant.
c. Remove the actuator spring (key 18). Unscrew
the cap screws from the stem connector (key 31),
and remove the stem connector. Remove the
stem (key 144) and attached spring adjustor,
thrust bearing, and spring seat (keys 74, 86,
and 19).

Instruction Manual
Form 1432
December 2007

667 Size 80 and 100 Actuators
10. For actuators with a snubber (see figure 8):

WARNING
To avoid personal injury due to the
sudden, uncontrolled movement of
parts, ensure the actuator spring is not
under compression before removing
the travel stop.
a. Remove the travel stop (key 84). Be certain
there is not compression in the actuator spring
(key 18). If the actuator was removed from the
valve, secure the stem connector (key 31) to the
actuator stem (key 144) to prevent the stem from
turning while unscrewing the stem and piston
assembly (key 23).
b. Using a wrench on the wrench flats near the
top of the stem and piston assembly, unscrew the
stem and piston assembly from the actuator
stem.
c. Unscrew the cap screws (key 106), and
remove the cylinder (key 93) and attached parts.
11. To disassemble snubber:
a. Remove the retaining rings, cylinder heads,
and stem and piston assembly (keys 95, 94,
and 23).

16. Refer to the size 80 actuator assembly
procedures. Carefully clean and inspect all parts,
and obtain any replacement parts required for
reassembly.

Assembly
See figure 4, Size 80 Actuator Construction for
location of parts.
1. Coat the threads of the stem (key 144) with
lithium grease lubricant (key 237). Install the spring
adjustor (key 74) and thrust bearing. Pack the
bearing (key 86) with lithium grease lubricant.
2. Mount the spring case (key 85) to the yoke
(key 73) using cap screws and hex nuts (keys 88
and 91).
Note
Units with a side-mounted handwheel
do not use hex nuts (key 91).
3. Install the spring adjustor, thrust bearing, and
spring seat (keys 74, 86 and 19) onto the actuator
stem (key 144). Slide the stem into the spring case
(key 85).
4. Align the spring seat (key 19) on the spring
adjustor (key 74), and slide the actuator spring
(key 18) squarely onto the spring seat.

b. Replace packing and O-rings (keys 118, 119,
96, 107, and 120).

5. Mount the spring case adaptor (key 89) to the
spring case (key 85) using cap screws and hex nuts
(keys 90 and 91).

c. Unscrew the spring case adaptor cap screws
and nuts (keys 90 and 91), and remove the
adaptor (key 89) from the actuator.

6. For actuators with a snubber (see figure 8),
install the cylinder (key 93) and attached parts with
cap screws (key 106). Slide the stem and piston
assembly (key 23) into the cylinder and thread onto
the actuator stem (key 144). Attach the travel stop
(key 84), if one is used, to the stem and piston
assembly.

12. Remove the actuator spring and spring seat
(keys 18 and 19).
13. Unscrew the cap screws and nuts (keys 88
and 91), and remove the spring case (key 85).
Note
In figure 8, the cap screws (key 88) on
units with side-mounted handwheels
do not use hex nuts (key 91).
14. Remove the spring adjustor (key 74) and the
attached thrust bearing (key 86).
15. Remove the cap screws (key 252), yoke
bushing retainer (key 251), 2 halves of the split yoke

bushing (key 249), and yoke bushing holder
(key 250).

7. For actuators without a snubber, install the
seal bushing (key 7) into the spring case adaptor
(key 89) followed by the snap ring (key 72). Replace
the seal bushing O-rings (keys 8 and 9) as required.
8. Coat the gasket (key 70) with lithium grease
lubricant (key 237). Position the lower diaphragm
casing (key 64) on the spring case adaptor, and
secure with cap screws (key 30).
9. Mount the lower diaphragm plate, diaphragm,
upper diaphragm plate, and, if used, spacer
(keys 71, 3, 4, and 2) on the actuator stem

Instruction Manual
Form 1432
December 2007

667 Size 80 and 100 Actuators
VENT ASSEMBLY (KEY 17)

CAP SCREW (KEY 12)
UPPER DIAPHRAGM
PLATE (KEY 4)

SPACER (KEY 2)
UPPER DIAPHRAGM
CASE (KEY 1)

CAP SCREW (KEY 13)

DIAPHRAGM (KEY 3)

HEX NUT (KEY 14)

LOWER DIAPHRAGM
PLATE (KEY 71)

LOWER DIAPHRAGM
CASE (KEY 64)

CAP SCREW (KEY 30)

PIPE BUSHING (KEY 92)
SNAP RING (KEY 72)

GASKET (KEY 70)

O-RING (KEY 9)

TRAVEL STOP (KEY 84)

O-RING (KEY 8)
SEAL BUSHING (KEY 7)

STANDARD DIAPHRAGM CONSTRUCTION

50A8597-D

SPACER (KEY 2)

PIPE BUSHING (KEY 78)

UPPER DIAPHRAGM
PLATE (KEY 4)

CAP SCREW (KEY 12)

DIAPHRAGM (KEY 3)

LOWER DIAPHRAGM
PLATE (KEY 71)

TRAVEL STOP (KEY 84)

50A8599-C
C0772 / IL

TOP LOADED DIAPHRAGM CONSTRUCTION

Figure 4. Size 80 Actuator Construction

(key 144), and secure using the cap screw (key 12).
Coat the cap screw threads with lithium grease
(key 237). Tighten the cap screw (key 12) to 544
NSm (400 lbfSft).

Note
Standard and top-loaded
constructions use the same key
numbers for parts. The parts look
different, but they use the same
assembly and disassembly sequence.
See figure 4, Size 80 Actuator
Construction.
10. Position the upper diaphragm casing (key 1) on
the diaphragm (key 3), and align the holes.

Note
When you replace actuator
diaphragms in the field, take care to
ensure the diaphragm casing cap
screws are tightened to the proper
load to prevent leakage, but do not
crush the material. Perform the
following tightening sequence with a
manual torque wrench for size 80 and
100 actuators.

CAUTION
Do not use lubricant on these cap
screws and nuts. Fasteners must be
clean and dry.
Overtightening the diaphragm casing
cap screws and nuts can damage the

Instruction Manual
Form 1432
December 2007

667 Size 80 and 100 Actuators
diaphragm. Do not exceed 68 NSm (50
lbfSft) torque.
11. Insert the cap screws (key 13) into the
diaphragm casing, and tighten the hex nuts (key 14)
in the following manner. The first four hex nuts
tightened should be diametrically opposed and 90
degrees apart. Tighten these four hex nuts
to 34 NSm (25 lbfSft).

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.

12. Tighten the remaining hex nuts in a clockwise,
crisscross pattern to 34 NSm (25 lbfSft).

D Use bypass valves or completely
shut off the process to isolate the
valve from process pressure. Relieve
process pressure from both sides of
the valve. Drain the process media
from both sides of the valve.

13. Repeat this procedure by tightening four hex
nuts, diametrically opposed and 90 degrees apart, to
a torque of 68 NSm (50 lbfSft).

D Vent the power actuator loading
pressure and relieve any actuator
spring precompression.

14. Tighten the remaining hex nuts in a clockwise,
crisscross pattern to 68 NSm (50 lbfSft).

D Use lock-out procedures to be
sure that the above measures stay in
effect while you work on the
equipment.

15. After the last hex nut is tightened to 68 NSm (50
lbfSft), all of the hex nuts should be tightened again
to 68 NSm (50 lbfSft) in a circular pattern around the
bolt circle.
16. Once completed, no more tightening is
recommended.
17. For size 80 actuators without a manual operator,
slide the following parts over the bottom of the stem;
yoke bushing holder (key 250), two split yoke
bushings (key 249), and yoke bushing retainer
(key 251). Secure into place with 4 cap screws
(key 252). Before inserting the bushing halves,
lightly coat with lithium grease (key 237) lubricant.
18. Mount the actuator on the valve in accordance
with the procedures in the Installation section.

Size 100 Actuator Maintenance
For size 100 actuators, refer to figure 5 for part
names and locations. Key number locations for Size
100 actuators are shown in figure 7.

WARNING
Avoid personal injury or property
damage from sudden release of
process pressure or bursting of parts.
Before performing any maintenance
operations:
D Always wear protective gloves,
clothing, and eyewear when
performing any maintenance
operations to avoid personal injury.

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.
1. Isolate the control valve from the line pressure,
release pressure from both sides of the valve, and
drain the process media from both sides of the
valve. If using a power actuator, also shut off all
pressure lines to the power actuator, release all air
pressure from the actuator. Use lock-out procedures
to be sure that the above measures stay in effect
while you work on the equipment.
2. Remove the shroud plate (key 65) by removing
the cap head screws (key 66).
a. For small spring force, loosen the jam nut
(key 26), and rotate the adjusting nut (key 25)
until spring compression is relieved.
b. For high spring force:
Note
To relieve spring compression when
high spring forces exist, refer to the
Spring section, and follow the
instructions given for size 100
actuators with high spring force.

Instruction Manual
Form 1432
December 2007

667 Size 80 and 100 Actuators

These instructions outline the
procedure required to decrease high
spring compression.

extension, and actuator stem connector
(keys 28, 36, and 42).

Loosen the jam nut (key 26), and rotate the adjusting
nut (key 25) until spring compression is relieved.

4. Remove the washer, upper diaphragm plate,
diaphragm, diaphragm retainer, and backup plate
(keys 37, 4, 3, 5 and 6).

3. Remove the pressure tubing or piping from the
top of the diaphragm casing.

5. Unscrew the six cap screws (key 11), and remove
the seal bushing retainer (key 10). Remove the seal
bushing (key 7).

4. For actuators with a top-mounted handwheel
(see figure 9), rotate the handwheel (key 58)
clockwise as far as it will go, unscrew the cap
screws (key 54), and remove the gear case cover
(key 53). Remove the travel stop cap screw, if one is
used, from the actuator stem extension (key 36), and
unscrew the hex nuts (key 47). Unscrew the cap
screws that attach the gear case assembly (key 41)
to the actuator, and remove the gear case assembly.
5. If necessary, remove the actuator from the valve
by separating the stem connector (key 31) and
removing the actuator-to-bonnet bolting. Separate
the stem connector by loosening the stem locknuts
(key 69) and unscrewing the four cap screws.
Note
If the actuator has been removed from
the valve, ensure that it is in the
vertical position. Then, block the
actuator stem (key 144) to support the
weight of the actuator stem, spring
seat and spring (keys 144, 19, and 18).
This will facilitate removal of the nut
(key 24) or actuator stem connector
(key 31, figure 8).

For Actuators Without the
Top-Loaded Option
Disassembly
Part names and locations are shown in figure 5.
Size 100 actuator key number locations are shown in
figure 7.
1. Unscrew the diaphragm casing cap screws and
nuts (keys 13 and 14) and remove the upper
diaphragm casing.
2. For actuators without a top-mounted
handwheel, unscrew and remove the travel stop
cap screw (key 12), if one is used, and the hex nut
(key 24).
3. For actuators with a top-mounted handwheel
(see figure 9), remove the hex nut, actuator stem

WARNING
To avoid personal injury and property
damage from the sudden release of
spring load, be sure that all spring
load is removed from the actuator
lower diaphragm casing.
6. Unscrew the four hex nuts that secure the lower
diaphragm casing to the yoke assembly (key 67),
and remove the lower diaphragm casing. Replace
the yoke assembly O-rings (key 70) as necessary.
7. The actuator spring (key 18) and stem (key 144)
can now be removed if necessary. Be sure to
disconnect the stem connector (key 31) before
removing the stem.
8. Refer to the following Assembly procedures.
Carefully clean and inspect all parts, or obtain
replacement parts required for reassembly.
Assembly
1. If the actuator stem (key 144, figure 7) was
removed, lubricate the threads on the stem with
lithium grease lubricant (key 237).
2. On the actuator stem, assemble the hex nuts,
thrust bearing, and spring seat (keys 26, 25, 86,
and 19) to the stem. Be certain that the thrust
bearing race with the larger inside diameter faces
the spring seat. Rotate the adjusting nut (key 25) to
position the spring seat 305 mm (12 inches) from the
end of the stem.
3. Install the actuator stem assembly into the yoke
assembly (key 67). Place a support under the stem
to position the lower end of the stem 254 mm (10
inches) above the bottom surface of the actuator
(actuator-to-bonnet joint).
Note
When installing lower diaphragm
casing, install the O-rings (key 70) into
the grooves found in the lower
diaphragm casing before placing the
casing on the yoke assembly. If the

Instruction Manual

667 Size 80 and 100 Actuators

Form 1432
December 2007

DIAPHRAGM CASING
COVER (KEY 15)

CAP SCREW (KEY 12)

UPPER DIAPHRAGM
PLATE (KEY 4)

HEX NUT (KEY 24)
HEX NUT (KEY 241)

UPPER DIAPHRAGM
CASING (KEY 1)

WASHER (KEY 37)

DIAPHRAGM (KEY 3)
CAP SCREW (KEY 13)

O-RING (KEY 240)

BACK UP PLATE (KEY 6)
SEAL BUSHING
RETAINER (KEY 10)
HEX NUT (KEY 14)

DIAPHRAGM RETAINER (KEY 5)

LOWER DIAPHRAGM
CASING ASSEMBLY
(KEY 67)

O-RING (KEY 9)
SEAL BUSHING (KEY 7)
O-RING (KEY 8)

HEX BUSHING (KEY 62)
CAP SCREW (KEY 11)
50A2623-F

STANDARD DIAPHRAGM CONSTRUCTION

UPPER DIAPHRAGM
CASING (KEY 1)

TRAVEL STOP (KEY 12)

DIAPHRAGM RETAINER
(KEY 5)

HEX NUT (KEY 24)
HEX NUT (KEY 241)

CAP SCREW (KEY 13)

WASHER (KEY 37)

DIAPHRAGM (KEY 3)

BACK UP PLATE (KEY 6)

CASE ADAPTOR
(KEY 245)

DIAPHRAGM PLATE
(KEY 4)

CAP SCREW (KEY 13)

O-RING (KEY 240)

DIAPHRAGM BACK UP
PLATE (KEY 246)

BACK UP PLATE (KEY 6)

DIAPHRAGM (KEY 3)
DIAPHRAGM
RETAINER
(KEY 5)
56A9820-B
C0773-1 / IL

TOP LOADED DIAPHRAGM CONSTRUCTION

Figure 5. Size 100 Actuator Construction

Instruction Manual
Form 1432
December 2007

667 Size 80 and 100 Actuators

spring interferes with installation of
the lower diaphragm casing, reposition
the spring by rotating the adjusting
nut (key 25).
4. Install the lower diaphragm casing, and secure it
by tightening the four hex nuts.
5. Lubricate the seal bushing O-rings (keys 8 and 9)
and the seal bushing (key 7) with lithium grease
lubricant. Install the seal bushing O-rings, seal
bushing, and seal bushing retainer (keys 8, 9, 7
and 10) and secure with the cap screws (key 11).
6. Install the diaphragm backup plate, diaphragm
retainer, diaphragm, upper diaphragm plate, and
washer (keys 6, 5, 3, 4, and 37) on the actuator stem
(key 144).

CAUTION
Install the diaphragm with the fabric
side facing away from the spring.
Smooth the edge of the diaphragm to
avoid wrinkling and be careful that the
diaphragm fold does not get pinched
when the upper diaphragm casing
(key 1) is installed.

Note
When you replace actuator
diaphragms in the field, take care to
ensure the diaphragm casing cap
screws are tightened to the proper
load to prevent leakage, but not crush
the material. Perform the following
tightening sequence with a manual
torque wrench for size 80 and 100
actuators.

CAUTION
Do not use lubricant on these cap
screws and nuts. Fasteners must be
clean and dry.
Overtightening the diaphragm casing
cap screws and nuts can damage the
diaphragm. Do not exceed 68 NSm (50
lbfSft) torque.
10. Insert the cap screws (key 13) into the upper
diaphragm casing, and tighten the hex nuts (key 14)
in the following manner. The first four hex nuts
tightened should be diametrically opposed and 90
degrees apart. Tighten these four hex nuts to 34
NSm (25 lbfSft).
11. Tighten the remaining hex nuts in a clockwise,
crisscross pattern to 34 NSm (25 lbfSft).

CAUTION
If the diaphragm (key 3) is installed so
air pressure is applied to the fabric
side, it will immediately delaminate the
sealing surface (smooth surface) from
the fabric. The delamination can cause
immediate failure of the diaphragm’s
ability to retain pressure.
7. For actuators with a top-mounted handwheel,
screw the actuator stem extension (key 36, figure 9)
as far as it will go into the actuator stem connector
(key 42, figure 9) before tightening the hex nut
(key 28, figure 9).
8. For actuators without a top-mounted
handwheel, Install the hex nut (key 241) and
tighten, install the jam nut (key 24) and tighten so
that it locks the hex nut key 24 in place. Install the
travel stop (key 12).
9. Position the upper diaphragm casing (key 1) on
the diaphragm (key 3) and align the holes.

12. Repeat this procedure by tightening the four hex
nuts, diametrically opposed and 90 degrees apart, to
a torque of 68 NSm (50 lbfSft).
13. Tighten the remaining hex nuts in a clockwise,
crisscross pattern to 68 NSm (50 lbfSft).
14. After the last hex nut is tightened to 68 NSm (50
lbfSft), all of the hex nuts should be tightened again
to 68 NSm (50 lbfSft) in a circular pattern around the
bolt circle.
15. Once completed, no more tightening is
recommended.
16. For actuators with a top-mounted handwheel
(see figure 9), mount the gear case assembly
(key 41) on the actuator using the cap screws
(key 54). Install the hex nuts (key 47) and travel stop
cap screw (if used) on the actuator stem extension
(key 36). Install the gear case cover (key 53) with
the cap screws.
17. Mount the actuator on the valve, and secure
with the actuator-to-bonnet bolting. Refer to the
Installation section to connect the actuator stem to
the valve plug stem.

Instruction Manual
Form 1432
December 2007

667 Size 80 and 100 Actuators
For Actuators With the Top-Loaded
Option
Disassembly
For key number locations refer to figure 7, and refer
to the Top-Loaded Actuator Detail shown in figure 7.
Also, refer to figure 5 for diaphragm construction
details.
1. Remove the 40 cap screws (key 13) from the
upper diaphragm casing (key 1) and remove the
casing.
2. Remove the travel stop cap screw (key 12), hex
nuts (key 24 and 241), washer (key 37), backup
plate (key 6), diaphragm retainer (key 5), diaphragm
(key 3), and diaphragm backup plate (key 246) with
O-ring (key 240).
3. Remove the 40 cap screws (key 13) from the
lower side of the casing adaptor (key 245) and
remove the adapter.
4. Remove the diaphragm plate (key 4) with O-ring
(key 240), diaphragm (key 3), diaphragm retainer
(key 5), and backup plate (key 6).
5. Unscrew the six cap screws (key 11) and remove
the seal bushing retainer (key 10). Remove the seal
bushing (key 7). Remove and replace the seal
bushing O-rings (keys 8 and 9) as necessary.

remove the lower diaphragm casing. Replace the
yoke assembly O-rings (key 70) as necessary.
10. The actuator spring (key 18) and stem (key 144)
can now be removed if necessary. Be sure to
disconnect the stem connector (key 31) before
removing the stem.
11. Refer to the size 100 actuator assembly
procedures. Carefully clean and inspect all parts,
and obtain any replacement parts required for
reassembly.
Assembly
1. If the actuator stem (key 144) was removed,
lubricate the threads on the stem with lithium grease
lubricant (key 237).
2. Assemble the hex nuts, thrust bearing, and spring
seat (keys 26, 25, 86, and 19) to the stem. Be
certain that the thrust bearing race with the larger
inside diameter faces the spring seat. Rotate the
adjusting nut (key 25) to position the spring seat 305
mm (12 inches) from the end of the stem.
3. Install the actuator stem assembly into the yoke
assembly (key 67). Place a support under the stem
to position the lower end of the stem 254 mm (10
inches) above the bottom surface of the actuator
(actuator-to-bonnet joint).
Note

WARNING
To avoid personal injury due to the
sudden, uncontrolled movement of
parts, do not loosen the four hex nuts
on the lower diaphragm casing when
spring pressure is applied. Ensure that
all spring precompression has been
released.
6. Unscrew the four hex nuts that secure the lower
diaphragm casing to the yoke assembly (key 67) and
remove the lower diaphragm casing. Replace the
yoke assembly O-rings (key 70) as necessary.
7. The actuator spring (key 18) and stem (key 144)
can now be removed if necessary. Be sure to
disconnect the stem connector (key 31) before
removing the stem.
8. Unscrew the six cap screws (key 11) and remove
the seal bushing retainer (key 10). Remove the seal
bushing (key 7). Remove and replace the seal
bushing O-rings (keys 8 and 9) as necessary.
9. Unscrew the four hex nuts that secure the lower
diaphragm casing to the yoke assembly (key 67) and

When installing the lower diaphragm
casing, install O-rings (key 70) into
grooves found in the lower diaphragm
casing before placing the casing on
the yoke assembly. If the spring
interferes with installation of the lower
diaphragm casing, reposition the
spring by rotating the adjusting nut.
4. Install the lower diaphragm casing (key 67), and
secure it by tightening the four hex nuts.
5. Lubricate the seal bushing O-rings (keys 8 and 9)
and the seal bushing (key 7) with lithium grease
lubricant. Install the seal bushing O-rings, seal
bushing (keys 8 and 9), and seal bushing retainer
(key 7) and secure with four hex nuts.

CAUTION
Install the diaphragm with the fabric
side facing away from the spring.
Smooth the edge of the diaphragm to
avoid wrinkling and be careful that the
diaphragm fold does not get pinched

Instruction Manual
Form 1432
December 2007

667 Size 80 and 100 Actuators

when the diaphragm adaptor (key 245,
figure 5) is installed.

CAUTION
If the diaphragm (key 3) is installed so
air pressure is applied to the fabric
side, it will immediately delaminate the
sealing surface (smooth surface) from
the fabric. The delamination can cause
immediate failure of the diaphragm’s
ability to retain pressure.
6. Install the diaphragm backup plate, diaphragm
retainer, diaphragm, O-ring, and diaphragm plate
(keys 6, 5, 3, 240, and 4) on the actuator stem
(key 144).
7. Carefully fold the diaphragm between the
diaphragm backup plate (key 246) and the case
adapter (key 245) while lowering the adapter onto
the lower diaphragm casing assembly (key 67).
Install all 40 cap screws (key 13) and finger tighten.
Note
When you replace actuator
diaphragms in the field, take care to
ensure the diaphragm casing cap
screws are tightened to the proper
load to prevent leakage, but not crush
the material. Perform the following
tightening sequence with a manual
torque wrench for size 80 and 100
actuators.

11. Tighten the remaining cap screws in a
clockwise, crisscross pattern to 68 NSm (50 lbfSft).
12. After the last cap screw is tightened to 68 NSm
(50 lbfSft), all of the cap screws should be tightened
again to 68 NSm (50 lbfSft) in a circular pattern
around the bolt circle.
13. Once completed, no more tightening is
recommended.

CAUTION
Install the diaphragm with the fabric
side facing toward the spring. Smooth
the edge of the diaphragm to avoid
wrinkling and be careful that the
diaphragm fold does not get pinched
when the upper diaphragm casing
(key 1) is installed.
14. Install the diaphragm backup plate, diaphragm,
diaphragm retainer, backup plate, washer
(keys 246, 3, 5, 6, 37, 241 and 24), hex nut
(key 241), and hex nut (key 24).
15. For actuators with a top-mounted handwheel
(see figure 9), screw the actuator stem extension
(key 36) as far as it will go into the actuator stem
connector (key 42) before tightening the hex nut
(key 28).
16. For actuators without the handwheel, Install
the travel stop cap screw (key 12), and tighten the
screw.
17. Position the upper diaphragm casing (key 1) on
the diaphragm (key 3) and align the holes.
Note

CAUTION
Do not use lubricant on these cap
screws and nuts. Fasteners must be
clean and dry.
Overtightening the cap screws (key 13)
can damage the diaphragm. Do not
exceed 68 NSm (50 lbfSft) torque.
8. Tighten the cap screws (key 13) in the following
manner. The first four cap screws tightened should
be diametrically opposed and 90 degrees apart.
Tighten these four cap screws to 34 NSm (25 lbfSft).
9. Tighten the remaining cap screws in a clockwise,
crisscross pattern to 34 NSm (25 lbfSft).
10. Repeat this procedure by tightening the four cap
screws, diametrically opposed and 90 degrees apart,
to a torque of 68 NSm (50 lbfSft).

When you replace actuator
diaphragms in the field, take care to
ensure the diaphragm casing cap
screws are tightened to the proper
load to prevent leakage, but not crush
the material. Perform the following
tightening sequence with a manual
torque wrench for size 80 and 100
actuators.

CAUTION
Do not use lubricant on these cap
screws and nuts. Fasteners must be
clean and dry.
Overtightening the cap screws (key 13)
can damage the diaphragm. Do not
exceed 68 NSm (50 lbfSft) torque.

Instruction Manual
Form 1432
December 2007

667 Size 80 and 100 Actuators
18. Insert the cap screws (key 13) into the upper
diaphragm casing (key 1), and finger tighten the
screws.

disassembly only as far as necessary to accomplish
the required maintenance; then, begin the assembly
at the appropriate step.

19. Tighten the cap screws (key 13) in the following
manner. The first four cap screws tightened should
be diametrically opposed and 90 degrees apart.
Tighten these four cap screws to 34 NSm (25 lbfSft).

Disassembly

20. Tighten the remaining cap screws in a
clockwise, crisscross pattern to 34 NSm (25 lbfSft).

1. Complete steps 1 through 16 of the Disassembly
portion of the Size 80 Actuator Maintenance section.

21. Repeat this procedure by tightening the four cap
screws, diametrically opposed and 90 degrees apart,
to a torque of 68 NSm (50 lbfSft).

2. Unscrew the cap screws (key 88), and remove
the spring case (key 85). Unscrew the cap screws
(key 136), and remove the retaining flange
(key 134). Do not lose the key (key 122).

22. Tighten the remaining cap screws in a
clockwise, crisscross pattern to 68 NSm (50 lbfSft).
23. After the last cap screw is tightened to 68 NSm
(50 lbfSft), all of the cap screws should be tightened
again to 68 NSm (50 lbfSft) in a circular pattern
around the bolt circle.
24. Once completed, no more tightening is
recommended.
25. For actuators with a top-mounted handwheel
(see figure 9), mount the gear case assembly
(key 41) on the actuator using cap screws (key 54).
Install the hex nuts (key 47) and travel stop cap
screw (if used) on the actuator stem extension
(key 36). Install the gear case cover (key 53) with
cap screws.
26. Mount the actuator on the valve, and secure
with the actuator-to-bonnet bolting. Refer to the
Installation section to connect the actuator stem to
the valve plug stem.

Size 80 Side-Mounted Handwheel
The side-mounted handwheel assembly (figure 8) is
normally used as a manual operator. The handwheel
can be mounted in either of two position orientations
so that, regardless of valve plug action,
counterclockwise rotation always opens the valve.
The assembly is a continuously connected type with
an indicator to show neutral position. By rotating the
handwheel away from neutral, the handwheel can be
used to limit travel in either direction, but not both
directions at the same time.

Key number location are shown in figure 8.

3. Unscrew two screws (key 79), and remove the
travel stop indicator (key 126).
4. Turn the handwheel (key 58) to raise the lower
sleeve. Continue turning the handwheel until the
lower sleeve is free of the worm gear (key 44). Lift
out the lower sleeve, bearing and gear retainer,
thrust bearing, and worm gear (keys 123, 45, 43,
and 44).
5. The worm shaft (key 51) and associated parts
can be removed in order to replace or lubricate
them. First, remove the handwheel cap (key 127)
and the handwheel (key 58). Do not lose the small
ball or spring (keys 141 and 142).
6. Loosen the two set screws and unscrew the two
worm retainers (keys 48 and 49). The ball bearings
(key 50) will come out with the retainers. Remove
the worm shaft (key 51).

Assembly
1. Pack the ball bearings (key 50) with lithium
grease lubricant (key 237), and insert one ball
bearing in the back worm retainer (key 48).
2. Thread the back worm retainer and ball bearing
(keys 48 and 50) into the gear case. Align the set
screw slot in the worm retainer with the set screw
hole in the gear case, insert the set screw, and
tighten.
3. Coat the worm shaft (key 51) threads with lithium
grease lubricant, and slide the shaft into the gear
case (key 41) so that the end of the shaft fits snugly
in the back worm retainer.

A grease fitting is provided on the gear box for
periodic gear lubrication with a general purpose
grease.

4. Insert the bearing in the front worm retainer
(key 49), and thread the retainer and ball bearing
into the gear case. Align the set screw slot in the
retainer with the set screw hole in the gear case,
insert the set screw, and tighten.

Instructions are given below for complete
disassembly and assembly. Perform the

5. Put the spring and ball (keys 142 and 141) in the
handwheel (key 58). Slide the handwheel onto the

Instruction Manual
Form 1432
December 2007

667 Size 80 and 100 Actuators

worm shaft (key 51). Thread the handwheel cap
(key 127) onto the worm shaft.
6. Pack the two thrust bearings (key 43) with lithium
grease lubricant. Install one thrust bearing; then
install the worm gear (key 44), followed by the
second thrust bearing and the bearing and gear
retainer (key 45).
7. The lower sleeve (key 123) has two screw holes
in one end. Coat the sleeve threads with lithium
grease lubricant, slide the end of the lower sleeve
with the holes into the thrust bearing (key 43), turn
the handwheel, and feed the sleeve through the
worm gear. Continue turning the handwheel until the
lower sleeve protrudes from the gear case. Fasten
the travel stop indicator (key 126) to the sleeve with
two machine screws (key 79).
8. Install the key (key 122) on the retaining flange
(key 134).
9. Install the retaining flange (key 134) so that the
key engages the slot in the lower sleeve. Secure the
retaining flange with the cap screws (key 136).
10. Adjust the set screws (key 121) to eliminate free
play in the bearings.
Note
Overtightening the set screws will
make handwheel operation difficult.
11. Coat the spring adjustor (key 74) threads with
lithium grease lubricant and install it over the lower
sleeve.

downward damping action, and the screw on the left
regulates upward damping action.

Size 100 Top-Mounted Handwheel
(Adjustable Up Travel Stop)
Key numbers are shown in figure 9.
A top-mounted handwheel assembly is normally
used as an adjustable-up travel stop to limit full
retraction of the actuator stem. Clockwise rotation of
the handwheel (key 58) moves the actuator stem
(key 144) downward. Counterclockwise rotation will
compress the spring and move the actuator stem
upward.
Instructions are given below for complete
disassembly and assembly. Disassemble only as far
as necessary to accomplish the required
maintenance; then, begin the assembly at the
appropriate step.

Disassembly
1. Isolate the control valve from the line pressure,
release pressure from both sides of the valve, and
drain the process media from both sides of the
valve. If using a power actuator, also shut off all
pressure lines to the power actuator, release all
pressure from the actuator. Use lock-out procedures
to be sure that the above measures stay in effect
while you work on the equipment.

12. Pack the thrust bearing (key 86) with lithium
grease lubricant, and install it on the spring adjustor
(key 74) as shown in figure 8.

2. Bypass the control valve. Reduce the loading
pressure to atmospheric (refer to the Maintenance
section), and remove the tubing or piping from the
diaphragm casing.

13. Slide the spring case (key 85) into position, and
secure with cap screws (key 88).

3. Unscrew the cap screws (key 54), and remove
the gear case cover (key 53).

14. Complete steps 3 through 16 of the Assembly
procedure in the Size 80 Actuator Maintenance
section.

4. Loosen the set screws (key 52) in the front and
back worm retainers (keys 48 and 49) and the
handwheel (key 58).

Size 80 Hydraulic Snubber
The size 80 Type 667 is available with a hydraulic
snubber, as shown in figure 8, to aid vertical stability
of the actuator stem movement. The snubber is
adjusted by rotating the adjusting screws (key 104,
figure 8) counterclockwise out of the reservoir
(key 99, figure 8) to increase damping action and
clockwise to decrease damping action. The adjusting
screw on the right (the top one of the two adjusting
screws in section B-B of figure 8) regulates

5. Remove the retaining ring (key 60), and remove
the handwheel.
6. Remove front and back worm retainers (keys 48
and 49) and the bearings (key 50).
7. Remove the worm shaft (key 51).
8. Remove the power screw assembly (key 46) by
placing a wrench on the double hex nuts (key 47)
and unscrew the assembly from the actuator stem
extension (key 36). The bearing and gear retainer,
thrust bearing, and worm gear (keys 45, 43, and 44)
will come out with the power screw.

Instruction Manual
Form 1432
December 2007

667 Size 80 and 100 Actuators
Assembly

WARNING

1. The front and back worm retainers (keys 48
and 49) each have a slot in their threads for a set
screw (key 52). Pack the ball bearings (key 50) with
lithium grease, and insert one ball bearing into the
back worm retainer (key 48).

Use only genuine Fisherr replacement
parts. Components that are not
supplied by Emerson Process
Management 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 could
give rise to personal injury and
property damage.

2. Thread the back worm retainer and ball bearing
into the gear case. Align the slot in the worm retainer
with the set screw hole in the gear case, insert the
set screw (key 52), and tighten.
3. Coat the worm shaft (key 51) threads with lithium
grease lubricant, and slide the shaft into the gear
case so that the end of the shaft fits snugly in the
back worm retainer.

Note

4. Insert the bearing into the front worm retainer
(key 49), and thread the retainer and ball bearing
into the gear case. Align the slot in the retainer with
the hole in the gear case, insert the set screw
(key 52), and tighten.

5. Slide the handwheel onto the worm shaft
(key 51), and install the retaining ring (key 60).
6. Pack the two thrust bearings (key 43) with lithium
grease lubricant. Install one thrust bearing, then the
worm gear (key 44), followed by the second thrust
bearing and the bearing and gear retainer (key 45).
7. Coat the power screw threads (key 46) with
lithium grease lubricant. Slide the power screw into
the thrust bearing (key 43), turn the handwheel, and
feed the sleeve through the worm gear.
8. Install the gear case cover (key 53), and tighten
the cap screws (key 54).

Parts Kits
Actuator Repair Kit
Parts kit includes keys 8, 9, and 70.
Key

Description
Size 80

Parts List

9. Adjust the set screws (key 55) to eliminate free
play in the bearings.

Note
Part numbers are shown for recommended spares
only. For part numbers not shown, contact your
Emerson Process Management sales office.

Note
Overtightening the set screws (key 55)
will make handwheel operation
difficult.

Actuator
Key
1
2
3*

Parts Ordering
Each actuator has a serial number stamped on the
nameplate. Always refer to this number when
corresponding with your Emerson Process
Management sales office regarding replacement
parts or technical information. Also, always refer to
the 11-character part number of each recommended
spare part, as found in the following parts list.

Part Number
R667X000802

4
5
6
7*

Description
Upper Diaphragm Casing
Spacer
Diaphragm
Size 80
Nitrile
Silicone
Size 100 std
Nitrile
Size 100 top loaded
Nitrile (2 required)
Diaphragm Plate, upper
Diaphragm Retainer
Backup Plate
Seal Bushing
Size 80, glass-filled PTFE
Size 100, Brass

*Recommended spare parts

Part Number

2R6376X0082
18B2713X062
20A2551X012
20A2551X012

1H7441X0022
20A2582X012

Instruction Manual
Form 1432
December 2007

Key
8*

10
11
12
13
14
15
16
17
18
19
19
20
21
22
24
25
26
30
31
32
33
34
35
37
39
40
60
62
63
64
65
66
67
69
70*
70*
71
72
73
74
78
79
84
85
86
87
88
89

Description
Part Number
O-Ring, nitrile (2 required)
Size 80
1D542906992
Size 100
1H8627X0042
O-Ring, nitrile
Size 80
1D439206992
Size 100
1R834206992
Seal Bushing Retainer
Cap Screw
Cap Screw
Cap Screw
Hex Nut
Diaphragm casing Cover
Cap Screw
Y602 Vent Assembly
Spring, steel
See following table
Spring Seat
Spring Plate
Spring Guide
Cap Screw
Washer
Hex Nut
Hex Nut
Hex Nut
Cap Screw
Stem Connector Assembly
Travel Scale
Machine Screw
Travel Indicator
Cap Screw
Washer
Nameplate
Drive Screw
Retaining Ring
Hex Bushing
Lifting Pin
Lower Diaphragm Casing
Shroud Plate
Cap Screw
Lower Diaphragm Casing, yoke & tie rod assembly
Hex Jam Nut
Gasket, composition
Size 80 only
1H7369X0012
O-Ring, nitrile (4 required)
Size 100 only
1C415706992
Diaphragm Plate, lower
Snap Ring
Yoke
Spring Adjustment screw
Pipe Bushing
Machine Screw
Travel Stop
Spring Case
Thrust Bearing
Cover Band Assembly
Cap Screw
Spring Case Adaptor

*Recommended spare parts

667 Size 80 and 100 Actuators
Key
90
91
92
144
235
236
237
238
240*

241
242
243
244*

245
246
249
250
251
252

Description
Part Number
Cap Screw
Hex Nut
Pipe Bushing
Actuator Stem
Bushing
Tag/Wire Assembly
Lithium Grease, 14 oz. (0.396 kg) can
Gasket Sealant (hard set), 11 oz. (0.311 kg) tube
O-Ring, nitrile
Size 100 only
Std (1 required) and w/top loaded (2 required) 1C339006992
Hex Nut
Y602-12 Vent Assembly
Warning Plate
Gasket, composition
Size 100
Top Loaded only (part not shown)
11A3391X012
Case Adaptor
Backup Plate
Bushing, split yoke
Yoke Bushing Holder
Yoke Bushing Retainer
Cap Screw

Side-Mounted Handwheel Size 80
29
38
41
43
44
45
48
49
50
51
57
58
121
122
123
124
126
127
134
135
136
137
138
139
140
141
142
143
237
238

Hand Grip
Hand Grip Bolt
Gear Case
Thrust Bearing
Worm Gear
Bearing & Gear Retainer
Back Worm Retainer
Front Worm Retainer
Ball Bearing
Worm Shaft
Grease Fitting
Handwheel
Set Screw
Key
Lower Sleeve
Machine Screw
Travel Stop Indicator
Handwheel Cap
Retaining Flange
Travel Stop Nut
Cap Screw
Set Screw
Cap Screw
Travel Stop Scale
Travel Stop Indicator Bracket
Ball
Spring
Machine Screw
Lithium Grease, 14 oz. (0.396 kg) can
Gasket Sealant (pliable film), 11 oz. (0.311 kg) tube

Instruction Manual
Form 1432
December 2007

667 Size 80 and 100 Actuators

Key 18 Spring, steel
ACTUATOR
SIZE

RANGE

TRAVEL

bar

psi

Inches

0.2-1

3-15

0.2-1

3-15

0.3-1.7

5-25

0.4-2

6-30

1.5

0.4-2

6-30

0.3-1.7

5-25

0.2-1

3-15

1.125

0.4-2

6-30

COMPRESSION
RATE
N/mm
Lb/in

MAXIMUM
LOAD
N

PART
NUMBER

COLOR
CODE

175.1

1000

25,042

5630

1H747727082

Red

288 9
288.9

1650

35 139
35,139

7900

1H747527082

Lt Blue
Lt.

367 7
367.7

2100

47 148
47,148

10 600
10,600

1H747327082

Yellow

455.3

2600

47,148

10,600

1H747627082

Lt. Green

542 58
542.58

3100

61 382
61,382

13 800
13,800

1H747027082

White

Key 18 Spring, steel
ACTUATOR
SIZE

100

COMPRESSION
RATE

MAXIMUM
LOAD

N/mm

Lb/in

310.8
516.5
787.9
1050.6

1775
2950
4500
6000

77,840
111,200
160,128
200,160

17,500
25,000
36,000
45,000

Top-Mounted Handwheel Size 100

Hydraulic Snubber Size 80

Key
28
36
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
61

Key
23
93
94
95
96*
97*
98
99
100*
101
102
103*
104
105
106
107*
108
109*
110
111
112
113
114
115
116
117
118*
119*
120*

Description
Hex Nut
Actuator Stem Extension
Gear Case
Actuator Stem Connector
Thrust Bearing
Worm Gear
Bearing & Gear Retainer
Power Screw Assembly
Hex Nut
Back Worm Retainer
Front Worm Retainer
Ball Bearing
Worm Shaft
Set Screw
Gear Case Cover
Cap Screw
Set Screw
Hex Nut
Grease Fitting
Handwheel
Woodruff Key
Slot Cover

Part Number

Description
Stem & Piston Assembly
Cylinder
Cylinder Head
Retaining Ring
O-Ring, nitrile (2 required)
Piston Ring, iron (2 required)
Pipe Plug
Reservoir
O-Ring, nitrile
Cap Screw
Pipe Plug
O-Ring, nitrile (2 required)
Adjusting Screw
Hex Nut
Cap Screw
O-Ring, nitrile
Hydraulic fluid, 2 gal (7.6L)
O-Ring, nitrile (2 required)
Orifice
Bypass & Check Valve Plug
Spring
E-Ring
Bushing
Flange
Packing Sleeve
Machine Screw
Packing, nitrile (8 required)
Packing, neoprene & cotton (4 required)
O-Ring, nitrile (2 required)

*Recommended spare parts

PART
NUMBER
10A2561X012
10A2562X012
10A2563X012
10A2564X012

Part Number

1F449206992
1C710321992

1H624706992

1D687506992

1H972406992
1E591406992

1P540806992
1P540906992
1P541206992

Instruction Manual
Form 1432
December 2007

50A8599-C

667 Size 80 and 100 Actuators

TOPĆLOADED ACTUATOR DETAIL

APPLY LUB/SEALANT
NOTE:
KEYS 243, 244, 245, AND 246
ARE NOT SHOWN.
50A8597-D / DOC

Figure 6. Size 80 Type 667 Actuator

Instruction Manual
Form 1432
December 2007

667 Size 80 and 100 Actuators

56A9820-B / DOC

TOPĆLOADED ACTUATOR DETAIL

APPLY LUB
NOTES:
1
THIS PART IS LOCATED 90_ TO FRONT OF POSITION SHOWN
2. KEYS 243 AND 244 ARE NOT SHOWN
50A2623-F / DOC

Figure 7. Size 100 Type 667 Actuator

Instruction Manual
Form 1432
December 2007

667 Size 80 and 100 Actuators

VIEW A

SECTION BĆB

VIEW A

APPLY LUB/SEALANT
50A8759-C / DOC

Figure 8. Size 80 Type 667 Actuator with Side-Mounted
Handwheel and Hydraulic Snubber

Instruction Manual

667 Size 80 and 100 Actuators

Form 1432
December 2007

APPLY LUB
50A2624-F / DOC

Figure 9. Size 100 Top-Mounted Handwheel

Fisher is a mark owned by Fisher Controls International LLC, a member of the Emerson Process Management business division of Emerson
Electric Co. Emerson Process Management, Emerson, and the Emerson logo are trademarks and service marks 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 any of their affiliated entities assumes responsibility for the selection, use and
maintenance of any product. Responsibility for the selection, use and maintenance of any product remains with the purchaser and end-user.

Printed in USA

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