Emerson Fisher 667 User manual

www.Fisher.com
Fisherr667 Diaphragm Actuators
Size 80 and 100
Contents
Introduction 1.................................
Scope of Manual 1.............................
Description 2.................................
Specifications 2...............................
Maximum Pressure Limitations 3.................
Installation 4...................................
Actuator Mounting 4...........................
Loading Connection 5..........................
Adjustments 5.................................
Size 80 Actuator Spring 6.......................
Travel 5......................................
Spring 6..................................
Size 100 Actuator Spring 6..................
Maintenance 7.................................
Size 80 Actuator Maintenance 8..................
Size 100 Actuator Maintenance 12...............
For Actuators without the
Top‐Loaded Option 15...................
For Actuators with the
Top‐Loaded Option 17...................
Size 80 Side‐Mounted Handwheel 20.............
Size 80 Hydraulic Snubber 21....................
Size 100 Top‐Mounted Handwheel
(Adjustable Down Travel Stop) 21..............
Parts Ordering 22...............................
Parts Kits 23...................................
Parts List 23...................................
Figure 1. Size 80 Fisher 667 Actuator
W1950
Introduction
Scope of Manual
This instruction manual provides information on installation, adjustment, maintenance, and parts ordering for the
Fisher 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.
Instruction Manual
D100311X012
667 Size 80 and 100 Actuators
May 2011

Instruction Manual
D100311X012
667 Size 80 and 100 Actuators
May 2011
2
Do not install, operate, or maintain 667 actuators without being fully trained and qualified in valve, actuator, and
accessory installation, operation, and maintenance. To avoid personal injury or property damage, it is important to
carefully read, understand, and follow all the contents of this manual, including all safety cautions and warnings. If you
have any questions about these instructions, contact your Emerson Process Management sales office before
proceeding.
Table 1. Specifications
SPECIFICATION ACTUATOR SIZE
80 100
Nominal Effective Diaphragm Area cm21761 2902
inch2273 450
Yoke Boss Diameters mm 127 127 178
inch 5 5H(1) 7
Acceptable Valve Stem Diameters mm 25.4 or 31.8 31.8 50.8
inch 1 or 1‐1/4 1‐1/4 2
Maximum Allowable Output Thrust
Standard Cast Iron
Construction
All Steel
Construction
N 62942 88075 200170
lb 14150 19800 45000
Maximum Travel mm 76 102
inch 3 4
Material Temperature Capabilities
_C-40 to 82
_F-40 to 180
Pressure Connections 1/4 NPT internal
Approximate Weights Without Handwheel kg 284 544
lb 626 1200
1. Heavy actuator‐to‐bonnet bolting.
Description
The 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 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 increases valve seat load on
valve applications where additional seat‐loading is necessary.
Specifications
Refer to table 1 for Specifications of the 667 actuator. See the actuator nameplate for information about a specific
actuator.

Instruction Manual
D100311X012
667 Size 80 and 100 Actuators
May 2011
3
Figure 2. Schematic Representation of Fisher 667 Actuator
DIAPHRAGM
AIR
LIFTS
SPRING
PUSHES
DOWN
ACTUATOR
STEM
667 REVERSE‐ACTING DIAPHRAGM ACTUATOR
AF3833‐A
A6127
Table 2. Maximum Pressure Limitations
PRESSURE LIMITATIONS
ACTUATOR SIZE
80 100
Standard Cast Iron Construction All Steel Construction
Maximum Casing
Pressure for Actuator
Sizing
bar 3.4 4.9 6.9
psig 50 70 100
Maximum Excess
Diaphragm Pressure
bar 1.4 1.4 1.7
psig 20 20 25
Maximum Diaphragm Casing
Pressure
Upper bench set plus Maximum
Excess Diaphragm Pressure or 4.1 bar
(60 psig), whichever is less.
Upper bench set plus Maximum
Excess Diaphragm Pressure or 5.5 bar
(80 psig), whichever is less.
Upper bench set plus Maximum
Excess Diaphragm Pressure or 7.9 bar
(115 psig), whichever is less.
Maximum Pressure Limitations
WARNING
To avoid personal injury or parts damage, do not exceed the Maximum Pressures listed in table 2. 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 casing pressure from
exceeding these limits.
The casing and diaphragm of 667 actuators are pressure operated. This air pressure provides force to compress the
spring and stroke the actuator. The following explanations describe the maximum pressure limits for 667 actuators.
Refer to the nameplate, warning tag, and table 2 for maximum values.
D Maximum Casing Pressure for Actuator Sizing: This is the maximum pressure that can be applied to provide full
travel of the actuator. If this stroking pressure is exceeded before the upper diaphragm plate contacts the travel
stop, damage to the stem or other parts might result. The Maximum Diaphragm Casing Pressure for a specific
actuator construction may be less than the Maximum Casing Pressure for Actuator Sizing. See table 2.
D Maximum Excess Diaphragm Pressure: This is the additional pressure that may be added when the actuator is at full
travel. If the Maximum Excess Diaphragm Pressure is exceeded once the actuator has reached full travel, damage to
the diaphragm or diaphragm casing might result.

Instruction Manual
D100311X012
667 Size 80 and 100 Actuators
May 2011
4
Because the actuator has traveled its specified travel, and the diaphragm head is physically stopped from movement,
the force 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 constructions, the maximum
Diaphragm Casing Pressure is the sum of the upper bench set, noted on the nameplate, added to the Maximum
Excess Diaphragm Pressure. For other actuator sizes, the value is lower, see table 2.
WARNING
To avoid personal injury or parts damage, do not exceed the Maximum Diaphragm Casing Pressure listed in table 2. 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.
Installation
WARNING
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.
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

Instruction Manual
D100311X012
667 Size 80 and 100 Actuators
May 2011
5
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.
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.

Instruction Manual
D100311X012
667 Size 80 and 100 Actuators
May 2011
6
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.
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.
Monitor loading pressure carefully when making adjustments. Do not exceed the pressure specifications of either the
loading regulator or the actuator casings.
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.
Size 80 Actuator Spring
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.

Instruction Manual
D100311X012
667 Size 80 and 100 Actuators
May 2011
7
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.
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
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.
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:

Instruction Manual
D100311X012
667 Size 80 and 100 Actuators
May 2011
8
D Do not remove the actuator from the valve while the valve is still pressurized.
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
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.
Figure 3. Dimension B for Spring Adjustment
50A2627‐C
A1007‐1
SPRING SEAT
ADJUSTING NUT
JAM NUT
B
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

Instruction Manual
D100311X012
667 Size 80 and 100 Actuators
May 2011
9
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.
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).
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).

Instruction Manual
D100311X012
667 Size 80 and 100 Actuators
May 2011
10
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).
b. Replace packing and O‐rings (keys 118, 119, 96, 107, and 120).
c. Unscrew the spring case adaptor cap screws and nuts (keys 90 and 91), and remove the adaptor (key 89) from
the actuator.
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).
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.
5. Mount the spring case adaptor (key 89) to the spring case (key 85) using cap screws and hex nuts (keys 90 and 91).
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.

Instruction Manual
D100311X012
667 Size 80 and 100 Actuators
May 2011
11
Figure 4. Size 80 Actuator Construction
CAP SCREW (KEY 12)
SPACER (KEY 2)
UPPER DIAPHRAGM
CASE (KEY 1)
DIAPHRAGM (KEY 3)
LOWER DIAPHRAGM
PLATE (KEY 71)
CAP SCREW (KEY 30)
GASKET (KEY 70)
TRAVEL STOP (KEY 84)
SEAL BUSHING (KEY 7)
VENT ASSEMBLY (KEY 17)
UPPER DIAPHRAGM
PLATE (KEY 4)
CAP SCREW (KEY 13)
HEX NUT (KEY 14)
LOWER DIAPHRAGM
CASE (KEY 64)
PIPE BUSHING (KEY 92)
SNAP RING (KEY 72)
O‐RING (KEY 9)
O‐RING (KEY 8)
SPACER (KEY 2)
UPPER DIAPHRAGM
PLATE (KEY 4)
DIAPHRAGM (KEY 3)
LOWER DIAPHRAGM
PLATE (KEY 71)
TRAVEL STOP (KEY 84)
PIPE BUSHING (KEY 78)
CAP SCREW (KEY 12)
STANDARD DIAPHRAGM CONSTRUCTION
TOP LOADED DIAPHRAGM CONSTRUCTION
50A8597‐D
50A8599-C
C0772 / IL
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 (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.

Instruction Manual
D100311X012
667 Size 80 and 100 Actuators
May 2011
12
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 diaphragm. Do not exceed the following
maximum torque values for the appropriate diaphragm material: EPDM/Meta-Aramid: 95 NSm (70 lbfSft); Nitrile, Silicone,
FKM (fluorocarbon) / Meta-Aramid: 68 NSm (50 lbfSft).
11. Insert the cap screws (key 13) into the diaphragm casing, and tighten the hex nuts (key 23) in the following
manner. The first four hex nuts tightened should be diametrically opposed and 90 degrees apart. Tighten these four
hex nuts to the initial torque value found in table 3 for the diaphragm material being used.
12. Tighten the remaining hex nuts in a clockwise, crisscross pattern to the initial torque value found in table 3 for the
diaphragm material being used.
13. Repeat this procedure by tightening four hex nuts, diametrically opposed and 90 degrees apart, to the final torque
value that is specified in table 3 for the diaphragm material being used.
14. Tighten the remaining hex nuts in a clockwise, crisscross pattern to the final torque value that is specified in table
3 for the diaphragm material being used.
15. After the last hex nut is tightened, complete another tightening sequence. Tighten in a circular pattern around the
bolt circle to the final torque value that is specified in table 3 for the diaphragm material being used.
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.
Table 3. Size 80 Casing Cap Screw Torque Values
DIAPHRAGM MATERIAL INITIAL TORQUE FINAL TORQUE
NSm (lbfSft) NSm (lbfSft)
EPDM / Meta-Aramid 41 (30) 82$13 (60$10)
Nitrile, Silicone, FKM/Meta-Aramid 34 (25) 68 (50)
WARNING
Avoid personal injury or property damage from sudden release of process pressure or bursting of parts. Before performing
any maintenance operations:

Instruction Manual
D100311X012
667 Size 80 and 100 Actuators
May 2011
13
D Do not remove the actuator from the valve while the valve is still pressurized.
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
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.
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. These instructions outline the procedure required to decrease high spring compression.
Loosen the jam nut (key 26), and rotate the adjusting nut (key 25) until spring compression is relieved.
3. Remove the pressure tubing or piping from the top of the diaphragm casing.
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).

Instruction Manual
D100311X012
667 Size 80 and 100 Actuators
May 2011
14
Figure 5. Size 100 Actuator Construction
DIAPHRAGM CASING
COVER (KEY 15)
UPPER DIAPHRAGM
PLATE (KEY 4)
UPPER DIAPHRAGM
CASING (KEY 1)
DIAPHRAGM (KEY 3)
CAP SCREW (KEY 13)
BACK UP PLATE (KEY 6)
HEX NUT (KEY 14)
DIAPHRAGM RETAINER (KEY 5)
LOWER DIAPHRAGM
CASING ASSEMBLY
(KEY 67)
HEX BUSHING (KEY 62)
CAP SCREW (KEY 11)
CAP SCREW (KEY 12)
HEX NUT (KEY 24)
HEX NUT (KEY 241)
WASHER (KEY 37)
O‐RING (KEY 240)
SEAL BUSHING
RETAINER (KEY 10)
O‐RING (KEY 9)
SEAL BUSHING (KEY 7)
O‐RING (KEY 8)
TRAVEL STOP (KEY 12)
HEX NUT (KEY 24)
HEX NUT (KEY 241)
WASHER (KEY 37)
BACK UP PLATE (KEY 6)
DIAPHRAGM PLATE
(KEY 4)
O‐RING (KEY 240)
BACK UP PLATE (KEY
6)
UPPER DIAPHRAGM
CASING (KEY 1)
DIAPHRAGM RETAINER
(KEY 5)
CAP SCREW (KEY 13)
DIAPHRAGM (KEY 3)
CASE ADAPTOR
(KEY 245)
CAP SCREW (KEY 13)
DIAPHRAGM BACK UP
PLATE (KEY 246)
DIAPHRAGM (KEY 3)
DIAPHRAGM
RETAINER
(KEY 5)
STANDARD DIAPHRAGM CONSTRUCTION
TOP LOADED DIAPHRAGM CONSTRUCTION
50A2623‐F
56A9820‐B
C0773‐1

Instruction Manual
D100311X012
667 Size 80 and 100 Actuators
May 2011
15
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 extension, and
actuator stem connector (keys 28, 36, and 42).
4. Remove the washer, upper diaphragm plate, diaphragm, diaphragm retainer, and backup plate (keys 37, 4, 3, 5 and
6).
5. Unscrew the six cap screws (key 11), and remove the seal bushing retainer (key 10). Remove the seal bushing (key
7).
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 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).

Instruction Manual
D100311X012
667 Size 80 and 100 Actuators
May 2011
16
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.
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.
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).
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.

Instruction Manual
D100311X012
667 Size 80 and 100 Actuators
May 2011
17
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 16). 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 (key 54).
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.
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.
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 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.

Instruction Manual
D100311X012
667 Size 80 and 100 Actuators
May 2011
18
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 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 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.
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
D100311X012
667 Size 80 and 100 Actuators
May 2011
19
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).
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
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.
18. Insert the cap screws (key 13) into the upper diaphragm casing (key 1), and finger tighten the screws.
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).
20. Tighten the remaining cap screws in a clockwise, crisscross pattern to 34 NSm (25 lbfSft).
21. Repeat this procedure by tightening the four cap screws, diametrically opposed and 90 degrees apart, to a torque
of 68 NSm (50 lbfSft).
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.

Instruction Manual
D100311X012
667 Size 80 and 100 Actuators
May 2011
20
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 16). 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 (key 54).
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.
A grease fitting is provided on the gear box for periodic gear lubrication with a general purpose grease.
Instructions are given below for complete disassembly and assembly. Perform the disassembly only as far as necessary
to accomplish the required maintenance; then, begin the assembly at the appropriate step.
Key number location are shown in figure 8.
Disassembly
1. Complete steps 1 through 16 of the Disassembly portion of the Size 80 Actuator Maintenance section.
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).
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.
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.
5. Put the spring and ball (keys 142 and 141) in the handwheel (key 58). Slide the handwheel onto the 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).