Fisher 667 User manual

D100310X012
Type 667 Diaphragm Actuator Sizes 30-76 and 87
Contents
Introduction 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope of Manual 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Pressure Limitations 3. . . . . . . . . . . . . . . .
Installation 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting the Actuator on the Valve 4. . . . . . . . . . . .
Discussion of Bench Set 5. . . . . . . . . . . . . . . . . . . . . .
Bench Set Spring Adjustment 6. . . . . . . . . . . . . . . . .
For Direct Acting Valves (PDTC) 6. . . . . . . . . . . . . .
For Reverse Acting Valves (PDTO) 6. . . . . . . . . . .
Installing the Stem Connector Assembly 7. . . . . . . .
Deadband Measurement 8. . . . . . . . . . . . . . . . . . . . . .
Loading Connection 8. . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Actuator 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Actuator Disassembly 9. . . . . . . . . . . . . . . . . . . . . . .
Actuator Assembly 9. . . . . . . . . . . . . . . . . . . . . . . . . .
Top-Mounted Handwheel Assembly (Adjustable
Down Travel Stop) 10. . . . . . . . . . . . . . . . . . . . . .
Disassembly for Top-Mounted Handwheel 10. . .
Assembly for Top-Mounted Handwheel 11. . . . . .
Side-Mounted Handwheel Assembly for
Size 34 through 60 Actuators 13. . . . . . . . . . . . .
Disassembly for Side-Mounted
Handwheel (34-60) 13. . . . . . . . . . . . . . . . . . . . . .
Assembly for Side-Mounted
Handwheel (34-60) 13. . . . . . . . . . . . . . . . . . . . . . .
Side-Mounted Handwheel Assembly for
Size 70, 76, and 87 Actuators 14. . . . . . . . . . .
Disassembly for Side-Mounted
Handwheel (70, 76, & 87) 14. . . . . . . . . . . . . . . .
Assembly for Side-Mounted Handwheel
Handwheel (70, 76, & 87) 14. . . . . . . . . . . . . . . .
Casing-Mounted Travel Stops 16. . . . . . . . . . . . . . . .
Figure 1. Type 667 or 667-4 Actuator Mounted
on easy-eRValve
W1916-1*/IL
Parts Kits 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Side-Mounted Handwheels Retrofit Kits 17. . . . . . . .
Top-Mounted Handwheel Retrofit Kits 17. . . . . . . . .
Actuator Repair Kits 17. . . . . . . . . . . . . . . . . . . . . . . . .
Parts List 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Actuator Assembly 17. . . . . . . . . . . . . . . . . . . . . . . . . .
Top-Mounted Handwheel 25. . . . . . . . . . . . . . . . . . . .
Side-Mounted Handwheel (30-60) 28. . . . . . . . . . . .
Side-Mounted Handwheel (70, 76, & 87) 31. . . . . .
Casing Mounted Travel Stops 31. . . . . . . . . . . . . . . .
Instruction Manual
Form 1203
February 2000 Type 667 Size 30-76 & 87

Type 667 Size 30-76 & 87
2
Table 1. Specifications
SPECIFICATION(1)
ACTUATOR SIZE
SPECIFICATION
(1)
30 34 40 45 46 50 60 70(1) 76 87(1)
Nominal Effective Area
Sq cm 297 445 445 667 1006 677 1006 1419 1006 1419
Nominal Effective Area Sq Inch 46 69 69 105 156 105 156 220 156 220
Yoke Boss Diameter
mm 54 54 71 71 71 90 90 90 90 125
Yoke Boss Diameter Inch 2-1/8 2-1/8 2-13/16 2-13/16 2-13/16 3-9/16 3-9/16 3-9/16 3-9/16 5
Acce
p
table Valve Stem Diameter
mm 9.5 9.5 12.7 12.7 12.7 19.1 19.1 19.1 19.1 25.4
Acceptable Valve Stem Diameter Inch 3/8 3/8 1/2 1/2 1/2 3/4 3/4 3/4 3/4 1
Maximum Allowable Out
p
ut Thrust(4)
N 10,230 10,230 12,010 25,131 33,582 25,131 30,246 39,142 30,246 39,142
Maximum Allowable Output Thrust
(4)
LB 2300 2300 2700 5650 7550 5650 6800 8800 6800 8800
Standard
mm 19 29 38 51 51 51 51 76(3) 51 76(3)
Maximum Travel(2)
Standard Inch 3/4 1-1/8 1-1/2 2 2 2 2 3(3) 2 3(3)
Maximum Travel
(2)
To
p
Loaded
mm - - - 19 - - - 19 - - - - - - 29 - - - 29 76
Top-Loaded Inch - - - 3/4 - - - 3/4 - - - - - - 1-1/8 - - - 1-1/8 3
Maximum Casing Pressure for Bar 3.8 4.8 4.8 4.5 3.5 4.5 3.5 3.4 3.4 3.4
Maximum
Casing
Pressure
for
Actuator Sizing(4,6) Psig 55 70 70 65 55 65 55 50 50 50
Maximum Excess Diaphragm Bar 3.9 1.4 1.4 0.7 0.7 0.7 0.7 0.7 0.7 0.7
Maximum
Excess
Dia hragm
Pressure(4,5) Psig 55 20 20 10 10 10 10 10 10 10
Maximum Diaphragm Casing Bar 7.6 6.2 6.2 5.2 4.5 5.2 4.5 4.1 4.1 4.1
Maximum
Dia hragm
Casing
Pressure(4,6,7) Psig 110 90 90 75 65 75 65 60 60 60
A
pp
roximate Weight
Kg 15 22 23 41 55 43 55 115 86 118
Approximate Weight Pounds 34 48 50 90 121 94 122 254 190 260
Material
Tem
p
erature
Nitrile Elastomers –40 to 82_C (–40 to 180_F)
Temperature
Capabilities Silicone Elastomers –54 to 149_C (–65 to 300_F)
1. These values also apply to the Type 667-4 actuator construction.
2. Actuator travel may be less than the value listed after connected to the valve.
3. Maximum actuator travel for Type 667-4 is 102 mm (4 inches).
4. See also the Specification portion of the introduction section.
5. 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. See the Maximum Pressure Limitation section.
6. Maximum diaphragm casing pressure must not be exceeded and must not produce a force on the actuator stem greater than the maximum allowable actuator output thrust or the
maximum allowable stem load. See the Maximum Pressure Limitation section.
7. 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.
Introduction
Scope of Manual
This instruction manual provides information on instal-
lation, adjustment, maintenance, and parts ordering for
the Type 667 actuator in sizes 30 through 76 and size
87. The Type 667-4 actuator in sizes 70 and 87 is also
covered. Refer to separate instruction manuals for in-
formation about the valve positioner and other acces-
sories used with these actuators.
Only personnel qualified through training or experience
should install, operate, and maintain a Type 667 ac-
tuator (see figure 1). If you have any questions about
these instructions, contact your Fisher Controls sales
office or sales representative before proceeding.
Description
The Type 667 actuator (figure 1) and the Type 667-4
actuator are reverse-acting, spring-opposed dia-
phragm actuators. They provide automatic operation of
control valves. The Type 667 actuator provides 76 mm
(3 inches) maximum actuator travel. The Type 667-4
actuator provides 102 mm (4 inches) maximum actua-
tor travel. Both actuators position the valve plug in re-
sponse to varying pneumatic loading pressure on the
diaphragm. Figure 2 shows the operation of these ac-
tuators.
A Type 667 or 667-4 actuator can be furnished with
either a top-mounted or a side-mounted handwheel
assembly. A top-mounted handwheel assembly is nor-
mally used as an adjustable down travel stop. (A down
travel stop limits actuator travel in the down direction
[when the stem is traveling out of the actuator]. Travel
in the up direction is when the stem is traveling into the
actuator.) A side-mounted handwheel assembly is nor-
mally used as an auxiliary manual actuator. The side-
mounted handwheel can also be used as an adjust-
able up or down travel stop. Casing-Mounted
adjustable up or down travel stops are also available
on this actuator.

Type 667 Size 30-76 & 87
3
Figure 2. Schematic of Type 667 and 667-4 Actua-
tors
STEM
SEAL
STEM
AIR LIFTS
STEM UP
SPRING PUSHES
STEM DOWN
A6759/IL
Note
If repeated or daily manual operation is
expected, the actuator should be
equipped with a side-mounted hand-
wheel rather than a casing-mounted
travel stop or top-mounted handwheel.
The side-mounted handwheel is de-
signed for more frequent use as a manu-
al operator.
Specifications
Refer to table 1 for Specifications of the Type 667 and
667-4 actuators. See the actuator nameplate for spe-
cific information for your actuator.
CAUTION
To avoid damage to equipment that may
result in the malfunction of the control
valve or loss of control of the process
caused by excessive pressure, do not
exceed the Maximum Pressures listed in
table 1. Refer to the Maximum Pressure
Limitations section below.
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 the
nameplate or table 1 for maximum values for your ac-
tuator.
DMaximum Casing Pressure for Actuator Siz-
ing: 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 diaphragm
plate contacts the travel stop, damage to the stem or
other parts might result.
DMaximum Excess Diaphragm Pressure: Addi-
tional pressure may be added when the actuator is at
full travel. If the Maximum Excess Diaphragm Pres-
sure is exceeded, damage to the diaphragm or dia-
phragm 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 cas-
ings. 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. Ex-
ceeding this limiting factor could result in leakage or
casing fatigue due to the deformation of the upper dia-
phragm casing.
DMaximum Diaphragm Casing Pressure: If the
Maximum Diaphragm Casing Pressure is exceeded,
damage to the diaphragm, diaphragm casing, or ac-
tuator might result.
Installation
Key number locations are shown in figures 6, 7, and 8,
unless otherwise noted. Also, refer to figure 3 for loca-
tion of parts.
CAUTION
To avoid damage to equipment, do not
exceed any of the maximum Diaphragm
Pressures listed in table 1.
DValve/Actuator Assembly: If the actuator and
valve are shipped together as a control valve assem-
bly, it has been adjusted at the factory, and may be
installed in the pipeline. After installing the valve in the
pipeline, refer to the Loading Connection procedures.
DActuator Mounting: If the actuator is shipped
separately or the actuator has been removed from the
valve, it is necessary to mount the actuator on the
valve before placing the valve in the pipeline. Refer to
the following actuator mounting procedures before
placing the valve in service. It is recommended that

Type 667 Size 30-76 & 87
4
you perform the Bench Set Spring Adjustment proce-
dures in this section to confirm that the actuator is ad-
justed correctly for the valve travel.
DPositioner: If a positioner is installed, or is to be
installed on the actuator, refer to the positioner instruc-
tion manual for installation. During the adjustment pro-
cedures, it will be necessary to provide a temporary
loading pressure to the actuator diaphragm.
DHandwheel Cap: If the handwheel cap (key 247,
figures 9, 11, or 16) is not in place, install the cap by
pushing it on by hand until it snaps into place.
Mounting the Actuator on the Valve
CAUTION
The Type 667 actuator spring load
pushes the stem down out of the actua-
tor yoke (see figure 2), and it can come
in contact with the valve stem during ac-
tuator mounting.
If the valve stem is allowed to remain in
the up position (towards the actuator)
during actuator mounting, it can inter-
fere with the actuator stem during
mounting. It is possible to damage valve
stem threads or bend the valve stem. Be
sure the valve stem is pushed down
(into the valve body), away from the ac-
tuator while mounting.
It may be necessary to apply a temporary loading
pressure to the actuator to move the actuator stem
away from the valve during installation.
If it is not possible to provide a temporary loading pres-
sure, be very careful when lowering the actuator over
the valve stem to prevent damage to valve stem and
threads.
WARNING
When moving the actuator stem with
loading pressure applied, exercise cau-
tion to keep hands and tools out of the
actuator stem travel path. If the loading
pressure is accidently disconnected,
personal injury and property damage is
possible if something is caught between
the actuator stem and other control
valve parts.
1. Provide a vise or some other method of supporting
the valve and the weight of the actuator during assem-
Figure 3. Actuator-Mounting Components for
Size 30 through 70 Actuators
VALVE STEM
YOKE LOCK NUT
YOKE BOSS
DIAMETER
BONNET
TYPICAL VALVE
(REFER TO
VALVE MANUAL)
W6199–1/IL
MATCH LINE
FOR
ACTUATOR
VENT NPT FEMALE
CONNECTION (TOP LOADING)
DIAPHRAGM CASINGS
DIAPHRAGM AND
STEM SHOWN IN
DOWN POSITION
DIAPHRAGM
PLATE
NPT FEMALE
CONNECTION
ACTUATOR SPRING
ACTUATOR STEM
SPRING SEAT
SPRING ADJUSTOR
STEM CONNECTOR
YOKE
TRAVEL INDICATOR DISK
INDICATOR SCALE
W0364–1/IL
bly. For direct or reverse acting valves, push the valve
stem down away from the actuator while mounting the
actuator.
2. Screw the stem locknuts all the way onto the valve
stem. With the concave side of the travel indicator disk
(key 34) facing the valve, install the travel indicator
disk on the valve stem. (Note: The travel indicator disk
is not used with size 87 actuators.)
3. Lift or hoist the actuator onto the valve bonnet:
a. For size 87 actuators: Slowly lower the actua-
tor down onto the valve while guiding the valve
stem into the opening in the end of the the actuator
stem (see figure 4). Once the actuator is in place,
insert the cap screws and tighten the hex nuts, se-
curing the actuator to the bonnet.

Type 667 Size 30-76 & 87
5
Figure 4. Bench Set Adjustment
SPRING
ADJUSTER
ACTUATOR STEM
UPPER BENCH
SET LOADING
PRESSURE
LOWER BENCH
SET PRESSURE
MARK
VALVE STEM
RATED VALVE
TRAVEL MEASURE
MARK VALVE
STEM HERE LOWER BENCH SET
LOADING PRESSURE
3
1
NOTES:
THE LOWER PSIG LOADING PRESSURE (MARKED
ON NAMEPLATE) WHERE THE FIRST MOVEMENT OF
ACTUATOR STEM IS DETECTED.
MARK THIS POINT WITH TAPE OR A MARKER.
THE UPPER PSIG LOADING PRESSURE RETRACTS
ACTUATOR STEM.
MEASURE DISTANCE OF TRAVEL. IT SHOULD
EQUAL THE TRAVEL SPAN SHOWN ON THE TRAVEL
INDICATOR SCALE.
1
2
3
4
2
4
4
50A8379-C
B2429-1 / IL
b. For all other size actuators:
DSlowly lower the actuator down onto the valve. As
the yoke passes over the end of the valve stem, place
the yoke locknut over the valve stem. (Note: On small
size actuators, it may be necessary to remove the indi-
cator disk and re-install it while lowering the actuator
onto the valve because the disk will not go through the
actuator yoke opening).
DContinue to lower the actuator while guiding the
valve stem into the opening in the end of the actuator
stem until the actuator is in place (see figure 4).
DScrew the yoke locknut onto the valve bonnet
and tighten the locknut.
4. Do not connect the actuator stem to the valve stem
at this time. Whenever the actuator is installed on the
valve, it is recommended that you perform the Bench
Set Spring Adjustment procedures below, to verify that
the actuator is still adjusted correctly.
Discussion of Bench Set
The bench set pressure range is used to adjust the
initial compression of the actuator spring with the
valve-actuator assembly “on the bench.”The correct
initial compression ensures that the valve-actuator as-
sembly will function properly when it is put into service
and the proper actuator diaphragm operating pressure
is applied.
The bench set range is established with the assump-
tion that there is no packing friction. When attempting
to adjust the spring in the field, it is very difficult to en-
sure that there is no friction being applied by “loose”
packing.
Accurate adjustment to the bench set range can be
made during the actuator mounting process by making
the adjustment before the actuator is connected to the
valve (see the Bench Set Spring Adjustment Proce-
dure).
If you are attempting to adjust the bench set range af-
ter the actuator is connected to the valve and the
packing tightened, you must take friction into account.
Make the spring adjustment so full actuator travel oc-
curs at the bench set range (a) plus the friction force
divided by the effective diaphragm area with increas-
ing diaphragm pressure or (b) minus the friction force
divided by the effective diaphragm area with decreas-
ing diaphragm pressure.
For an assembled valve-actuator assembly, the valve
friction may be determined by following the procedure
described below:
1. Install a pressure gauge in the actuator loading
pressure line that connects to the actuator diaphragm
casing.
Note
Steps 2 and 4 require that you read and
record the pressure shown on the pres-
sure gauge.
2. Increase the actuator diaphragm pressure and read
the diaphragm pressure as the actuator reaches its
mid-travel position.

Type 667 Size 30-76 & 87
6
3. Increase the actuator diaphragm pressure until the
actuator is at a travel position greater than its mid-trav-
el position.
4. Decrease the actuator diaphragm pressure and
read the diaphragm pressure as the actuator reaches
its mid-travel position.
The difference between the two diaphragm pressure
readings is the change in the diaphragm pressure re-
quired to overcome the friction forces in the two direc-
tions of travel.
5. Calculate the actual friction force:
Friction
Force, = 1/2
pounds
Difference
in pressure
readings, psig 
Effective
diaphragm area,
inches2
ǒǓ
ǒǓ
Refer to table 1 for the effective diaphragm area.
When determining valve friction, you can make dia-
phragm pressure readings at a travel position other
than mid-travel if you desire. If you take readings at
zero or at the full travel position, take extra care to en-
sure that the readings are taken when the travel just
begins or just stops at the position selected.
It is difficult to rotate the spring adjustor (key 74, figure
6, 7, and 8) when the full actuator loading pressure is
applied to the actuator. Release the actuator loading
pressure before adjusting. Then re-apply loading pres-
sure to check the adjustment.
Bench Set Spring Adjustment
The term “bench set”means that the actuator is not
connected to the valve, or any other loads. Ensure that
the actuator diaphragm is at the bottom of its travel as
shown in figure 4. (Note: Some spring compression is
required to move the diaphragm to the bottom of its
travel.)
Also, provide a certified pressure gauge that will accu-
rately read the diaphragm pressure from 0 through the
upper bench set pressure marked on the nameplate.
Apply loading pressure to the diaphragm.
Stroke the actuator a few times to ensure that the
pressure gauge is working correctly, and that the ac-
tuator is functioning properly. It is important to be sure
that the actuator assembly is not binding or producing
any friction on the actuator stem movement.
Key numbers are shown in figures 6, 7, and 8.
For Direct-Acting Valves (PDTC)
1. If not already accomplished, push the valve stem
down away from the actuator to the closed position.
2. Set the diaphragm loading pressure to 0.3 bar (5
psig) over the upper bench set pressure. The upper
travel stop should be contacting the diaphragm casing.
3. Slowly decrease the pressure towards the upper
bench set pressure while checking for the first move-
ment of the actuator stem.
4. If movement occurs before or after the upper pres-
sure is reached, adjust the spring adjuster (see figure
4). Thread the adjuster up or down on the actuator
stem until the actuator stem movement is first de-
tected at the upper bench set pressure. (Note: You
may need to lower the loading pressure to reduce
spring compression, allowing the spring adjuster to
turn.)
5. Be sure the spring adjuster is adjusted to meet the
requirements of step 4 above.
6. Apply the lower bench set loading pressure to the
diaphragm. This will extend the actuator stem toward
the valve. Mark the end of the actuator stem on a
nearby surface using tape or some other method.
7. Slowly increase the diaphragm pressure until the
upper bench set loading pressure is applied. Again,
the travel stop should be against the diaphragm cas-
ing.
8. Measure the distance between the mark or tape to
the end of the actuator stem. This distance should
match the travel span shown on the travel indicator
scale (key 32).
9. If the span of travel is correct, bench set is com-
plete. Proceed to the Installing the Stem Connector
Assembly subsection.
10. If the travel span is not exact, remember the free-
length and load rate tolerances for the spring may pro-
duce a slightly different span than specified. Contact
your Fisher Controls sales office or sales representa-
tive for assistance.
For Reverse-Acting Valves (PDTO)
1. If not already accomplished, push the valve stem
down away from the actuator to the open position. Lat-
er, when installing the connector, pull up the valve
stem to the closed position.
2. Set the diaphragm loading pressure to a value less
than the lower bench set pressure (near zero). The
down travel stop should be contacting the yoke.
3. Slowly increase the pressure towards the lower
bench set pressure while checking for the first move-
ment of the actuator stem.
4. If movement occurs before or after the lower
pressure is reached, adjust the spring adjuster (see
figure 4). Thread the adjuster up or down on the actua-
tor stem until the actuator stem movement is first de-
tected at the lower bench set pressure.
5. Apply the upper bench set loading pressure to the
diaphragm. This will retract the actuator stem away

Type 667 Size 30-76 & 87
7
from the valve. Mark the end of the actuator stem on a
nearby surface using tape or some other method.
6. Slowly decrease the diaphragm pressure until the
lower bench set loading pressure is applied. Again, the
down-stops should be against the yoke.
7. Measure the distance between the mark or tape to
the end of the actuator stem. This distance should
match the travel span shown on the travel indicator
scale (key 32).
8. If the span of travel is correct, bench set is com-
plete. Proceed to the Installing the Stem Connector
Assembly subsection.
9. If the travel span is not exact, remember the free-
length and load rate tolerances for the spring may pro-
duce a slightly different span than specified. Contact
your Fisher Controls sales office or sales representa-
tive for assistance.
Installing the Stem Connector Assembly
When installing the stem connector assembly (key 31),
the actuator and valve stem threads should engage
the threads of the stem connector by a distance equal
to the diameter of the stem.
Note
Replacement stem connectors are an
assembly of two stem connector halves,
cap screws, and a spacer between the
connector halves. Remove the spacer
and discard it, if present, before clamp-
ing the actuator and valve stems togeth-
er.
1. If necessary, push the valve stem down so that the
valve plug is touching the seat ring on direct-acting
valves. For reverse-acting valves, pull the stem up to
the closed position. Always start with the valve plug on
the seat.
2. If necessary, screw the valve stem locknuts down,
away from the connector location. For all actuators
except size 87, ensure that the travel indicator disk
(key 34) is on top of the locknuts.
3. Apply the diaphragm pressure to the lower bench
set pressure. (Or, the upper bench set pressure for
reverse-acting valves.) This should be the same pres-
sure used in the bench set steps, and it is marked on
the nameplate.
4. Place the stem connector half with the threaded
holes, approximately half way between the actuator
and valve stems. Refer to figures 6, 7, and 8 to help
locate the connector position.
Be sure that the actuator and valve stem threads are
engaging the threads of the stem connector by a dis-
tance equal to one diameter of the stem.
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 one
diameter of that stem. Damage to
threads on either stem or in the stem
connector can cause the parts to be re-
placed prematurely.
5. Install the other half of the stem connector and in-
sert the cap screws and tighten them. If installing a
positioner, also attach the feedback bracket at the
same time.
6. Screw the valve stem locknuts up until the indicator
disk contacts the bottom of the stem connector, or for
size 87 actuators, tighten the locknuts against the
stem connector. Do not overtighten the locknuts.
7. Slowly increase and then decrease pressure sever-
al times, stroking the valve from the lower bench set
pressure to the upper pressure.
Be sure that the valve is in the closed position (up or
down, depending on valve action). Loosen the screws
on the travel scale, and align it with the travel indicator
disk. Stroke the valve full travel to ensure that the trav-
el matches the valve travel on the travel indicator
plate. If valve travel is not correct, repeat the stem
connector procedure.
Note
For push-down-to-close valves, the
valve plug seat is the limit for downward
travel and the actuator up-stop is the
limit for upward (away from the valve)
movement. For push-down-to-open
valves, the actuator down-stop is the
limit for downward movement, and the
valve seat is the limit for upward (away
from the valve) movement. For Type 667
actuators, a down-stop (key 77, figure 6)
is installed to limit actuator diaphragm
downward movement when the actuator
provides the limit.

Type 667 Size 30-76 & 87
8
Figure 5. Typical Reverse-Acting Valve Response
to Deadband
UPPER
BENCH SET
PRESSURE
LOWER
BENCH SET
PRESSURE
9
3
0
OPENING
VALVE
15 1.0
0.6
0.2
CLOSING
VALVE
CLOSED OPEN MID RANGE
VALVE TRAVEL
DIAPHRAGM PRESSURE, PSIG
DIAPHRAGM PRESSURE, BAR
1
NOTE:
DEADBAND IS CAUSED BY FRICTION.
A6588-1 / IL
RANGE OF
DEADBAND 1
Deadband Measurement
Deadband is caused by packing friction, unbalanced
forces, and other factors in the control valve assembly.
Deadband is the range a measured signal can vary
without initiating a response from the actuator (see
figure 5). Each actuator spring has a fixed spring rate
(force). You have verified that the right spring was
installed in the actuator by completing the Bench Set
Spring Adjustment steps.
Deadband is one factor that affects the control valve
assembly operation during automatic loop control. The
control loop tolerance for deadband varies widely de-
pending on the loop response. Some common symp-
toms of the deadband being too wide are no move-
ment, a ‘‘jump”movement, or oscillating movements of
the actuator during automatic loop control. The follow-
ing steps are provided to determine the span of dead-
band. The percent of deadband is helpful in trouble-
shooting problems with the process control loop.
1. Start at a pressure near the lower bench set pres-
sure, slowly increase pressure until the valve is
approximately at mid-travel. Note this pressure read-
ing.
2. Slowly decrease pressure until movement of the
valve stem is detected, and note this pressure.
3. The difference between these two pressures is
deadband, in psi.
4. Calculate the percent of deadband by:
Deadband, psi
Deadband = Deadband, psi = nn %
Bench Set Span, psi
Loading Connection
Key number locations are shown in figures 6, 7, and 8,
unless otherwise noted.
The loading pressure connections are made at the fac-
tory if the valve, actuator, and positioner come as a
unit. Keep the length of tubing or piping as short as
possible to avoid transmission lag in the control signal.
If a volume booster, valve positioner or other accesso-
ry is used, be sure that it is properly connected to the
actuator. Refer to the positioner instruction manual or
other manuals as necessary. For actuators shipped
separately or whenever the actuator pressure connec-
tions are installed, use the following steps:
1. Connect the loading pressure piping to the NPT
female connection in the side of the yoke (key 73).
2. For size 70 and 87 actuators, if necessary, remove
the 1/4-inch NPT bushing if a 1/2-inch NPT female
connection is needed to increase connection size. The
connection can be made with either piping or tubing.
3. Cycle the actuator several times to be sure that the
valve stem travel is correct when the correct pressure
ranges are applied to the diaphragm.
4. If valve stem travel appears to be incorrect, refer to
the Bench Set Spring Adjustment procedures at the
beginning of this section. Do not place the valve in ser-
vice if it is not reacting correctly to diaphragm loading
pressure changes.
Maintenance
Actuator parts are subject to normal wear and must be
inspected and replaced when necessary. The frequen-
cy of inspection and replacement depends on the se-
verity of service conditions. Because of the care Fisher
Controls takes in meeting all manufacturing require-
ments (heat treating, dimensional tolerances, etc.),
use only replacement parts manufactured or furnished
by Fisher Controls.
WARNING
Avoid personal injury or property dam-
age from sudden release of process
pressure or uncontrolled movement of
parts. Before performing any mainte-
nance operations:
DAlways wear protective gloves,
clothing, and eyewear when performing
any maintenance operations to avoid
personal injury.
DDisconnect any operating lines pro-
viding air pressure, electric power, or a

Type 667 Size 30-76 & 87
9
control signal to the actuator. Be sure
the actuator cannot suddenly open or
close the valve.
DUse 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.
DVent the power actuator loading
pressure and relieve any actuator spring
pre-compression.
DUse lock-out procedures to be sure
that the above measures stay in effect
while you work on the equipment.
DThe 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.
The maintenance instructions are divided into several
sections: Actuator, Top-Mounted Handwheel Assem-
bly (Adjustable Down Travel Stop), Side-Mounted
Handwheel Assembly for Size 34 through 60 Actuators
(Manual Actuator), Side-Mounted Handwheel Assem-
bly for Size 70, 76 and 87 Actuators (Manual Actua-
tor), and Casing-Mounted Travel Stops.
Actuator
This procedure describes how the actuator can be
completely disassembled and assembled. When in-
spection or repairs are required, disassemble only
those parts necessary to accomplish the job; then,
start the assembly at the appropriate step.
Key numbers are shown in figures 6, 7, or 8, unless
otherwise noted. Figure 6 shows the size 30 through
60 actuators, figure 7 shows the size 70 actuator, and
figure 8 shows the size 87 actuator.
Actuator Disassembly
Isolate the control valve from the line pressure, release
pressure from both sides of the valve body, and drain
the process media from both sides of the valve. Also
shut off all pressure lines to the power actuator, re-
lease all pressure from the actuator. Use lock-out pro-
cedures to be sure that the above measures stay in
effect while you work on the equipment.
1. Remove the tubing or piping from the connection in
the top of the yoke (key 73). For a top-loaded
construction, also remove the piping or tubing from the
connection in the upper diaphragm casing (key 1).
2. Turn the spring adjuster (key 74) counterclockwise
(toward the valve body) until all spring compression
is relieved.
WARNING
To avoid personal injury due to the sud-
den uncontrolled movement of parts, do
not loosen the stem connector cap
screws when the stem connector has
spring force applied to it.
3. If necessary, remove the actuator from the valve
body by separating the stem connector (key 31). Loos-
en the stem locknuts for the size 87 actuator, and re-
moving the stem connector nuts. For all other sizes,
separate the stem connector by loosening the stem
locknuts (keys 69 and 75) and unscrewing the two
stem connector cap screws.
4. Unscrew the spring adjuster (key 74) from the ac-
tuator stem (key 144). Also lift the spring seat and
spring (key 19 and 18) out of the yoke.
5. Remove the diaphragm casing cap screws and
nuts (keys 13 and 14), and lift off the upper diaphragm
casing (key 1).
6. Remove the following connected parts: the dia-
phragm (key 3), upper diaphragm plate (key 4), spacer
(key 2), cap screw (key 12), lower diaphragm plate
(key 71), and actuator stem (key 144). Be careful
when pulling the threads of the actuator stem through
the seal bushing (key 7) to avoid damaging the O-rings
(key 8).
7. Remove the cap screw (key 12) to separate the
parts of this assembly.
8. To remove the seal bushing, remove the snap ring
(key 72), and lift out the bushing. Inspect, and if neces-
sary, replace O-rings (8 and 9).
9. Remove cap screws (key 30), and take off the low-
er diaphragm casing (key 64) and the gasket (key 70,
size 30 through 60 and 76) or O-ring (key 70, size 70
or 87). If necessary, the down travel stops (key 77)
can be removed.
Actuator Assembly
1. Coat the O-rings (key 70, sizes 70 and 87) with lu-
bricant (key 237 or equivalent). Or, coat the gasket
with sealant (key 237 or equivalent). Place a new gas-
ket or O-ring (key 70) on the yoke (key 73). Position
the lower diaphragm casing (key 64) on the yoke, align
the holes, and insert and tighten the cap screws (key
30). If down travel stops (key 77) were removed, insert
and tighten them.
2. Coat the O-rings (keys 8 and 9) with lubricant (key
237 or equivalent) and place the O-rings in the seal
bushing (key 7).

Type 667 Size 30-76 & 87
10
3. Fill the seal bushing with lubricant (key 237 or
equivalent), slide the bushing into the yoke (key 73),
and install the snap ring (key 72).
4. Assemble the actuator stem (key 144), lower dia-
phragm plate (key 71), diaphragm (key 3), upper dia-
phragm plate (key 4), and the travel stop cap screw
and spacer (keys 12 and 2). Coat the cap screw
threads with Lubriplate Mag-1 or equivalent (key 237).
Tighten the cap screw (key 12) to 41 NSm (30 lbfSft)
torque for size 30 actuators, 68 NSm (50 lbfSft) torque
for size 34 and 40 actuators, or 183 NSm (135 lbfSft)
torque for size 45 to 76 and 87 actuators. Place this
assembly in the actuator. Take care when pushing the
actuator stem through the seal bushing so that the
threads do not damage the O-rings.
Note
When you replace actuator diaphragms
in the field, take care to ensure the dia-
phragm casing bolts 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 30-76 and 87 ac-
tuators.
CAUTION
Over-tightening the diaphragm cap
screws and nuts (keys 13 and 14) can
damage the diaphragm. Do not exceed
27 NSm (20 lbfSft) torque.
Note
Do not use lubricant on these bolts and
nuts. Fasteners must be clean and dry.
5. Install the upper diaphragm casing (key 1), and
install the cap screws and nuts (keys 13 and 14).
Tighten the diaphragm cap screws and nuts in the fol-
lowing manner.
6. The first four bolts tightened should be diametrically
opposed and 90 degrees apart. Tighten these four
bolts to 13 NSm (10 lbfSft).
7. Tighten the remaining bolts in a clockwise, criss-
cross pattern to 13 NSm (10 lbfSft).
8. Repeat this procedure by tightening four bolts, dia-
metrically opposed and 90 degrees apart, to a torque
of 27 NSm (20 lbfSft).
9. Tighten the remaining bolts in a clockwise, criss-
cross pattern to 27 NSm (20 lbfSft).
10. After the last bolt is tightened to 27 NSm
(20 lbfSft), all of the bolts should be tightened again to
27 NSm (20 lbfSft) in a circular pattern around the bolt
circle.
11. Once completed, no more tightening is recom-
mended.
12. Install the actuator spring (key 18) and spring seat
(key 19). Apply lubricant (key 239 or equivalent) to the
threads of the actuator stem and to the surface of the
spring adjuster (key 74) that contacts the spring seat.
Thread the spring adjuster onto the actuator stem.
13. Mount the actuator onto the valve in accordance
with the procedures in the Installation section.
Top-Mounted Handwheel Assembly
(Adjustable Down Travel Stop)
Actuator key numbers are shown in figures 6, 7, and 8.
And, top-mounted handwheels are shown in figures 9,
11, and 12.
Note
If repeated or daily manual operation is
expected, the actuator should be
equipped with a side-mounted hand-
wheel rather than a casing-mounted
travel stop or top-mounted handwheel.
The side-mounted handwheel is de-
signed for more frequent use as a manu-
al operator.
A top-mounted handwheel assembly (figures 9, 11,
and 12) is usually used as an adjustable down travel
stop to limit full extension of the actuator stem. Turning
the handwheel counterclockwise pulls the extension
rod (key 150, figures 9, 11, and 12) up, retracting the
actuator stem.
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.
Disassembly for Top-Mounted Handwheel
1. Bypass the control valve, reduce loading pressure
to atmospheric, and remove the tubing or piping from
the connection in the top of the yoke (key 73, figures 6,
7, and 8).
2. Turn the handwheel (key 58) clockwise so that the
handwheel assembly is not causing any spring com-
pression.
3. Turn the actuator spring adjuster (key 74) to relieve
all the compression from the spring (key 18).
4. If servicing just the thrust bearing, races, and hand-
wheel screw (keys 180, 181, and 160), use the follow-
ing steps:

Type 667 Size 30-76 & 87
11
DRemove the cap and take out the cotter pin. Re-
move the castle nut, bearing retainer, thrust bearing,
and races (keys 247, 167, 166, 180, and 181).
DUse the handwheel to remove the handwheel
screw (key 160) from the handwheel body (key 148).
DIf necessary, remove the extension rod (key 150)
at this time. Most maintenance procedures do not re-
quire the rod to be removed.
DClean and inspect all parts or replace parts as
necessary. Upon re-assembly, lubricate handwheel
threads, bearings, and races with Never-Seez Nickel
Special (key 239) or equivalent.
DLubricate and re-install the handwheel screw into
handwheel body (key 148). Lubricate and replace the
races, bearing, and retainer (keys 181, 180, and 182).
Replace the castle nut (key 166), tighten it, and insert
the cotter pin (key 167). Replace the handwheel cap
(key 247).
5. For size 30 through 60 and 76 actuator
handwheels (figures 9 and 11):
DRemove the cap screws (key 161). Make sure
that the guide plate can turn between the handwheel
body and the mounting plate (keys 157, 148 and 158).
DRemove the cap (key 247) and cotter pin (key
167). Remove the castle nut (key 166) and, if neces-
sary, unscrew the extension rod (key 150). Remove
the rod, the handwheel body (key 148), and the at-
tached parts.
DRemove the hex nuts and cap screws (keys 14
and 13, figures 6, 7, and 8) from the diaphragm cas-
ings. Lift off the upper diaphragm casing (key 1) and
the mounting plate (key 158).
DTurn the handwheel (key 58) to remove the hand-
wheel screw (key 160) from the handwheel body (key
148). Remove the retaining ring (key 60) if the hand-
wheel (key 58) must be separated from the handwheel
screw.
DIf necessary, perform other actuator maintenance
before returning to the following assembly steps.
6. For size 70 and 87 actuator handwheels
(figure 12):
DRemove the cap (key 247). Take out the cotter
pin (key 167) and remove the castle nut, the bearing
retainer, and thrust bearing (keys 166, 182, 181, and
180). It is not necessary to remove the extension rod
(key 150) at this time.
DRemove the hex nuts and cap screws (keys 14
and 13, figures 6, 7, and 8) from the diaphragm cas-
ings. Lift off the upper diaphragm casing (key 1), hand-
wheel body (key 148) and attached parts.
DIf travel stops (key 152) are used, note and re-
cord their position relative to the cap screws (key 154)
for use in assembly. Remove the travel stops and cap
screws, and remove either the mounting plate (key
158, figure 12) or the handwheel body (key 148, figure
12) and attached parts.
DTurn the handwheel (key 58) to remove the hand-
wheel screw (key 160) from the handwheel body (key
148). Remove the retaining ring (key 60) if the hand-
wheel (key 58) must be separated from the handwheel
screw.
DIf necessary, perform other actuator maintenance
before returning to the following assembly steps.
Assembly for Top-Mounted Handwheel
For size 30 through 60 and 76 actuator hand-
wheels:
Refer to figures 9 and 11 for top-mounted handwheel
assemblies.
1. If it was removed, slide the handwheel (key 58)
onto the end of the handwheel screw (key 160), and
snap the retaining ring (key 60) into place. Also, install
the guide post (key 150) if it was removed.
2. Generously coat the threads of the handwheel
screw (key 160) with lubricant (key 239 or equivalent).
Turn the screw into the handwheel body (key 148).
3. Install the mounting plate (key 158) to the dia-
phragm casing (key 1, figures 6, 7, and 8) with the cap
screws (key 154). Finger tighten the screws.
4. If travel stops were used, install the travel stops to
their original positions as recorded in the proceeding
Disassembly steps. Tighten the screws and travel
stops.
Note
When you replace actuator diaphragms
in the field, take care to ensure the dia-
phragm casing bolts 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 30-76 and 87 ac-
tuators.

Type 667 Size 30-76 & 87
12
CAUTION
Over-tightening the diaphragm cap
screws and nuts (keys 13 and 14) can
damage the diaphragm. Do not exceed
27 NSm (20 lbfSft) torque.
Note
Do not use lubricant on these bolts and
nuts. Fasteners must be clean and dry.
5. Position the diaphragm casing (key 1, figures 6, 7,
and 8), mounting plate (key 158), travel stops (key
152), if used, and cap screws (key 154) on the dia-
phragm. Install the cap screws and hex nuts (keys 13
and 14, figures 6, 7, and 8) and tighten in the following
manner.
6. The first four bolts tightened should be diametrically
opposed and 90 degrees apart. Tighten these four
bolts to 13 NSm (10 lbfSft).
7. Tighten the remaining bolts in a clockwise, criss-
cross pattern to 13 NSm (10 lbfSft).
8. Repeat this procedure by tightening four bolts, dia-
metrically opposed and 90 degrees apart, to a torque
of 27 NSm (20 lbfSft).
9. Tighten the remaining bolts in a clockwise, criss-
cross pattern to 27 NSm (20 lbfSft).
10. After the last bolt is tightened to 27 NSm
(20 lbfSft), all of the bolts should be tightened again to
27 NSm (20 lbfSft) in a circular pattern around the bolt
circle.
11. Once completed, no more tightening is recom-
mended.
12. If necessary, screw the extension rod (key 150
into the connector (key 27). Slide the guide plate (key
157) onto the extension rod (key 150). For size 45
through 76, place the spacer (key 253) on top of the
guide plate (key 157). If necessary, replace the exten-
sion rod (key 150). Slide the handwheel body (key
148) over the extension rod, position the handwheel
body on the spacer (key 253), align the holes, and in-
sert and tighten the cap screws (key 161).
13. Lubricate and install the thrust bearings (keys 181
and 180), install the bearing retainer (key 182), install
the castle nut (key 166) on the extension rod. Do not
overtighten the castle nut on the bearing. Install the
cotter pin (key 167). Replace the cap (key 247).
14. Refer to the Assembly portion of the Actuator
maintenance section.
For size 70 and 87 actuators handwheels (figure
12):
Refer to figure 12 for top-mounted handwheel assem-
blies.
1. If removed, slide the handwheel (key 58) onto the
end of the handwheel screw (key 160), and snap the
retaining ring (key 60) into place.
2. Generously coat the threads of the handwheel
screw (key 160) with lubricant (key 239 or equivalent).
Turn the screw into the handwheel body (key 148).
3. If necessary, install the extension rod (key 150) into
the connector (key 27) and tighten it. Position the
handwheel body (key 148) on the diaphragm casing
(key 1, figures 6, 7, and 8), and align the holes. Insert
the cap screws (key 154). Finger tighten the screws.
4. If travel stops were used, return the travel stops to
their original positions as recorded in the proceeding
Disassembly steps. Tighten the screws and travel
stops.
Note
When you replace actuator diaphragms
in the field, take care to ensure the dia-
phragm casing bolts 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 30-76 and 87 ac-
tuators.
CAUTION
Over-tightening the diaphragm cap
screws and nuts (keys 13 and 14) can
damage the diaphragm. Do not exceed
27 NSm (20 lbfSft) torque.
Note
Do not use lubricant on these bolts and
nuts. Fasteners must be clean and dry.
5. Slide the extension rod (key 150) into the hand-
wheel screw (key 160), and position the diaphragm
casing (key 1, figures 6, 7, and 8) with the attached
parts on the diaphragm. Install the cap screws and hex
nuts (keys 13 and 14, figures 6, 7, and 8) and tighten
in the following manner.
6. The first four bolts tightened should be diametrically
opposed and 90 degrees apart. Tighten these four
bolts to 13 NSm (10 lbfSft).

Type 667 Size 30-76 & 87
13
7. Tighten the remaining bolts in a clockwise, criss-
cross pattern to 13 NSm (10 lbfSft).
8. Repeat this procedure by tightening four bolts, dia-
metrically opposed and 90 degrees apart, to a torque
of 27 NSm (20 lbfSft).
9. Tighten the remaining bolts in a clockwise, criss-
cross pattern to 27 NSm (20 lbfSft).
10. After the last bolt is tightened to 27 NSm
(20 lbfSft), all of the bolts should be tightened again to
27 NSm (20 lbfSft) in a circular pattern around the bolt
circle.
11. Once completed, no more tightening is recom-
mended.
12. Lubricate and install the thrust bearings (keys 180
and 181), install the bearing retainer (key 182), install
the castle nut (keys 166) on the extension rod. Do not
overtighten the castle nut on the bearing. Install the
cotter pin (key 167). Replace the cap (key 247).
13. Refer to the Assembly portion of the Actuator
maintenance section.
Side-Mounted Handwheel Assembly for
Size 34 through 60 Actuators
A side-mounted handwheel assembly (figures 13 and
14) is usually used as a manual actuator. This design
is frequently used to drive the valve open or closed
under loading conditions. Turning the handwheel
clockwise past the neutral position always closes a
push-down-to-close valve. A pair of levers (key 146,
figure 13) on a handwheel assembly close the valve by
moving the valve stem.
Instructions are given below for disassembly and as-
sembly. Perform the disassembly only as far as neces-
sary to accomplish the required maintenance; then
begin the assembly at the appropriate step.
Disassembly for Side-Mounted Handwheel
(34-60)
1. If desired, the handwheel assembly can be re-
moved from the actuator yoke. To do this, remove the
nuts (keys 147 and 170) from the U-bolts (keys 166
and 143) that hold the assembly to the yoke.
2. Remove retaining ring (key 154), and drive out the
lever pivot pin (key 153).
3. Two screws (key 156) hold the right- and left-hand
levers (key 146) together. Remove the screw from the
top of the levers so that the levers will drop down out
of the assembly. Disassemble further, if necessary, by
removing the other screw.
4. Remove the screw (key 161) and pointer mounting
bolt (key 159, not shown) located behind the pointer
(key 160).
5. Remove the nut (key 54), lockwasher (key 150),
and washer (key 149), and take off the handwheel
(key 51). Be careful not to lose the small ball (key 55)
and spring (key 56).
6. Unscrew the bearing retainer (key 136) after loos-
ening the locking set screw (key 168, not shown).
7. Pull the screw assembly (key 145) out of the hand-
wheel body. The operating nut (key 132) will come out
with the screw. Also, remove the bushing (key 151) on
sizes 34 and 40.
8. If required, remove the bearings (key 152), one
from the bearing retainer and the other from the hand-
wheel body.
Assembly for Side-Mounted Handwheel
(Sizes 34-60)
1. Pack the bearings (key 152) with lubricant (key 239
or equivalent). Insert one bearing and the bushing (key
151) in the handwheel body (key 142) as shown in fig-
ure 13 or 14. The bushing is not used in a handwheel
assembly for size 45 through 60 actuators.
2. Coat the screw threads with lubricant (key 239) or
equivalent, and thread the operating nut onto the
screw. Slide the second bearing (key 152) onto the
screw, and insert the end of the screw into either the
bushing (key 151) as shown in figure 13 or 14 or into
the bearing.
3. Thread the bearing retainer (key 136) into the body
(key 142). Completely tighten the bearing retainer, and
then loosen it one-quarter turn. Tighten the set screw
(key 168, not shown) to hold the bearing retainer in
place.
4. Coat the groove in the handwheel body (key 142)
with lubricant (key 237 or equivalent). Insert the spring
(key 56) and ball (key 55) into the handwheel (key 51).
Holding the ball and spring in the handwheel, put the
handwheel (key 51), the washer (key 149), the lock-
washer (key 150), and the hex nut (key 54) on the end
of the screw (key 145). Tighten the hex nut.
5. Position the pointer mounting bolt (key 159, not
shown) and the pointer (key 160) as shown in figure
13 or 14. Insert and tighten the screw (key 161).
6. Assemble the two levers (key 146) with the cap
screws (key 156) for handwheel assemblies for size
45, 50, and 60 actuators or with the machine bolts (key
156) for handwheel assemblies on size 34 and 40 ac-
tuators.
7. If the handwheel assembly was removed from the
yoke, remount the handjack assembly to the yoke us-
ing the dowel pins for alignment. Position the U-bolts
(keys 166 and 143) on the yoke, and hand-tighten the

Type 667 Size 30-76 & 87
14
hex nuts (keys 170 and 147) to hold the handwheel
assembly in position. Cap screws (key 163) should be
tight against the yoke legs to provide stability. Tighten
nuts (key 144). Finish tightening the U-bolt nuts to 163
NSm [120 lbfSft] (key 170) and 41 NSm [30 lbfSft] (key
147). Be sure the handwheel assembly remains flat
against the mounting pad and perpendicular to the
yoke.
8. Position the levers (key 146) as shown in figure 13
or 14. Insert the lever pivot pin (key 153), and snap the
retaining ring (key 154) onto the lever pivot pin.
Side-Mounted Handwheel Assembly for
Size 70, 76, and 87 Actuators
A side-mounted handwheel assembly (figure 15) is
usually used as a manual actuator. Turning the hand-
wheel clockwise past the neutral position always
closes the valve body. A sleeve (key 123, figure 15) on
a handwheel assembly for a size 70, 76 or 87 actuator
opens the valve body by moving the valve stem.
Instructions are given below for complete disassembly
and assembly. Perform the disassembly only as far as
necessary to accomplish the required maintenance;
and then begin the assembly at the appropriate step.
Disassembly for Side-Mounted Handwheel
(Sizes 70, 76, & 87)
1. Bypass the control valve. Reduce the loading pres-
sure to atmospheric. Disconnect the loading pressure
tubing or piping at the yoke.
2. Remove cover band (key 87), and relieve spring
compression by turning the spring adjuster (key 74)
counterclockwise.
3. Remove the cap screws and nuts (keys 13 and 14)
and lift off the upper diaphragm casing (key 1).
4. Remove the travel stop screw (key 12) and spacer
(key 2), and take off the diaphragm plate (key 4), the
diaphragm (key 3), and the lower diaphragm plate (key
71).
5. Unscrew the cap screws (key 90) and remove the
following connected parts: the lower diaphragm casing
(key 64), the O-ring (key 70), spring case adaptor (key
89), the seal bushing, O-rings, and snap ring (keys 7,
8, 9, and 72).
6. Remove the snap ring (key 72), and slide the seal
bushing and O-rings (keys 7, 8, and 9) out of the
spring case adaptor (key 89).
7. Take out the actuator spring (key 18).
8. Remove the stem connector (key 31) and stem
connector cap screws.
9. Pull the actuator stem (key 144) up and out of the
yoke. The spring seat (key 19), spring adjuster (key
74), thrust bearing (key 128), and the pinned adjusting
screw (key 131) will come out with the actuator stem.
10. Turn the handwheel so that the lower sleeve (key
123) extends out of the bottom of the yoke. DO NOT
move the neutral indicator scale (key 125).
11. Loosen two set screws (key 121), and unscrew
the bearing retainer flange (key 45). Take out the
worm gear and two thrust bearings (key 132), one on
each side of the gear.
12. The worm shaft (key 51) and associated parts can
be disassembled, if desired, by first removing hand-
wheel nut (key 127) and the handwheel (key 58). Do
not lose the small ball (key 141) and spring (key 142).
13. Loosen the set screw (key 52) for each worm
shaft retainer (keys 48 and 49). Unscrew the two worm
retainers (keys 48 and 49). The ball bearings (key 50)
will come out with the retainers.
Assembly for Side-Mounted Handwheel
(Sizes 70, 76, & 87)
1. The front and back worm retainers (keys 48 and
49) each have a slot in their threads for a set screws
(key 52). Pack the ball bearings (key 50) with lubricant
(key 239) or equivalent, and insert one ball bearing in
the back worm retainer (key 49) as shown in figure 15.
2. Thread the back bearing retainer and ball bearing
(keys 49 and 50) into the yoke. Align the slot in the
bearing retainer with the set screw hole in the yoke,
insert the set screw (key 52), and tighten it.
3. Coat the worm shaft (key 51) threads with lubricant
(key 239 or equivalent), and slide the shaft into the
yoke so that the end of the shaft fits snugly into the
back bearing retainer.
4. Insert the bearing in the front bearing retainer (key
49), and thread the retainer and ball bearing into the
yoke. Align the slot in the retainer with the hole in the
yoke, insert the set screw (key 52), and tighten it.
5. Put the spring and ball (keys 141 and 142) in the
handwheel (key 58). Slide the handwheel onto the
worm shaft (key 51). Thread the hex nut (key 127)
onto the worm shaft.
6. Pack the two needle bearings (key 132) and coat
the worm gear (key 44) threads with lubricant (key
239) or equivalent. Insert the key (key 122), the bear-
ings, and the worm gear in the yoke (key 73) as shown
in figure 15.
7. Slots are cut in the threads of the bearing retainer
flange (key 45). Thread the flange into the yoke so that
the slots and the holes for the set screws (key 121)
align. Insert the screws, and tighten them.

Type 667 Size 30-76 & 87
15
8. The lower sleeve (key 123) has a milled groove in
one end. Coat the sleeve threads with lubricant (key
239 or equivalent), slide the end of the lower sleeve
with the groove into the bearing retainer flange, turn
the handwheel, and feed the sleeve through the worm
gear so that the slot in the lower sleeve engages the
key (key 122) in the yoke. Continue turning the hand-
wheel until the lower sleeve protrudes 81 mm (3.19
inches) below the surface of the yoke. The bottom of
the lower sleeve should be even with the bottom of the
extension on the neutral indicator.
9. Pack the thrust bearing (key 128) with lubricant
(key 239) or equivalent. Slide the actuator stem (key
144) and the attached adjusting screw (key 131), pin
(key 130), thrust bearing (key 128), spring seat (key
19), and spring adjuster (key 74) into the yoke. The
lower end of the stem slides through the lower sleeve
(key 123) and the lower sleeve slides into the adjusting
screw (key 131), as shown in figure 15.
10. Position the actuator stem (key 144) against the
valve stem. Clamp both stems between the two halves
of the stem connector (key 31), and be sure the
threads are engaged properly on both stems. The
stem connector should not be closer than 3.2 mm
(0.125 inches) to the lower sleeve when the actuator
stem is in the retracted position. This adjustment will
provide approximately 3.2 mm (0.125 inches) of free
travel of the lower sleeve in either direction for manual
operation. Fasten the halves together with the cap
screws.
11. Put the actuator spring (key 18) in the yoke on the
spring seat (key 19).
12. Coat the O-rings (keys 8 and 9) with lubricant (key
237) or equivalent, and insert them in the seal bushing
(key 7). Slide the seal bushing and O-rings into the
spring case adaptor (key 89).
13. Install the snap ring (key 72).
14. Slide the seal bushing and O-rings (keys 7, 8,
and 9) over the actuator stem (key 144), and position
the spring case adaptor (key 89), lower diaphragm
casing (key 64), and O-ring (key 70) on the yoke.
15. Insert and tighten the cap screws (key 90).
16. Slide the lower diaphragm plate (key 71), the dia-
phragm (key 3) with the patterned side up, the dia-
phragm plate (key 4), the spacer (key 2), and the cap
screw (key 12) on the actuator stem (key 144). Tighten
the cap screw.
17. Put the diaphragm casing (key 1) on the dia-
phragm. Align the holes in the diaphragm (key 3) and
the diaphragm casings (keys 1 and 64).
Note
When you replace actuator diaphragms
in the field, take care to ensure the dia-
phragm casing bolts 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 30-76 and 87 ac-
tuators.
CAUTION
Over-tightening the diaphragm cap
screws and nuts (keys 13 and 14) can
damage the diaphragm. Do not exceed
27 NSm (20 lbfSft) torque.
Note
Do not use lubricant on these bolts and
nuts. Fasteners must be clean and dry.
18. Install the cap screws and hex nuts (keys 13
and 14) and tighten in the following manner.
19. The first four bolts tightened should be diametri-
cally opposed and 90 degrees apart. Tighten these
four bolts to 13 NSm (10 lbfSft).
20. Tighten the remaining bolts in a clockwise, criss-
cross pattern to 13 NSm (10 lbfSft).
21. Repeat this procedure by tightening four bolts,
diametrically opposed and 90 degrees apart, to a
torque of 27 NSm (20 lbfSft).
22. Tighten the remaining bolts in a clockwise, criss-
cross pattern to 27 NSm (20 lbfSft).

Type 667 Size 30-76 & 87
16
23. After the last bolt is tightened to 27 NSm (20 lbfSft),
all of the bolts should be tightened again to 27 NSm
(20 lbfSft) in a circular pattern around the bolt circle.
24. Once completed, no more tightening is recom-
mended.
25. Return the actuator to service after completing the
Loading Connection procedure in the Installation sec-
tion and the procedures in the Adjustments section.
Casing-Mounted Travel Stops
Note
If repeated or daily manual operation is
expected, the actuator should be
equipped with a side-mounted hand-
wheel rather than a casing-mounted
travel stop or top-mounted handwheel.
The side-mounted handwheel is de-
signed for more frequent use as manual
operator.
Casing-mounted adjustable travel stops (shown in fig-
ures 16 through 20) are available to limit travel in the
down direction (extending the actuator stem) or in the
up direction (retracting the actuator stem). The travel
stop in figure 16 is a down travel stop, the travel stop
in figure 17 is an up and down travel stop, and the
travel stops in figures 18, 19, and 20 are up travel
stops.
Use the locknuts (key 151, figures 16 and 17), stem
(key 150, figure 18), handwheel (key 58, figure 19) or
cap screw (key 177, figure 20) to set the point at which
the travel stop limits travel. Be sure to tighten the lock-
nuts and replace the cap (key 149, figures 16 and 18;
key 247, figure 17) after setting the travel stop.
Instructions are given below for disassembly and as-
sembly. Perform the disassembly only as far as neces-
sary to accomplish the required maintenance; then,
begin the assembly at the appropriate step.
Key numbers are shown in figures 16 through 20.
1. Remove the cap (key 149 or 247) if the travel stop
uses one. For down travel stops, loosen the locknuts
(key 151, figures 16 and 17) so that the stop is not
causing any spring compression.
2. Bypass the control valve, reduce loading pressure
to atmospheric, and remove the tubing or piping from
the connection in top of the yoke (key 73, figures 6, 7,
and 8).
3. For down travel stops, turn the spring adjuster (key
74, figures 6, 7, and 8) out of the yoke toward the stem
connector (key 31) to relieve all the compression in the
spring (key 18).
4. For style 11 travel stops (figure 17), unscrew the
cap screws (key 161), and make sure that the guide
plate (key 157) can turn between the handwheel body
(key 148) and the mounting plate (key 158).
5. Use a wrench on the nuts (key 151) to unscrew the
extension rod (key 150). Remove the rod, the hand-
wheel body (key 148), and the attached parts.
6. Unscrew the hex nuts and cap screws (keys 14 and
13, figures 6, 7, and 8) from the diaphragm casings.
Lift off the upper diaphragm casing (key 1, figures 6, 7,
and 8) and, for the style 11 travel stop, the mounting
plate (key 158). For styles 10, 12 and 13, the travel
stop assembly will be removed with the casing.
7. Note and record the position of travel stops (key
152) relative to the cap screws (key 154) for use in
assembly. Unscrew the travel stops and cap screws,
and remove either the mounting plate (key 158) or the
handwheel body (key 148) and attached parts.
8. Separate the stem (key 150) and screw (key 160,
figure 17) from the handwheel body.
9. Before reassembling, lubricate parts indicated by
key 239 in figures 16 through 20. Use lubricant (key
239 or equivalent).
10. Reassemble parts in the reverse order of removal.
11. When replacing the cap screws (key 154) and, if
used, the travel stops (key 152), be sure to return
them to their original position as recorded in step 6.
CAUTION
Over-tightening the diaphragm cap
screws and nuts (keys 13 and 14), fig-
ures 6, 7, and 8 can damage the dia-
phragm. Do not exceed 27 NSm (20 lbfSft)
torque.
12. Install the cap screws and nuts (keys 13 and 14,
figures 6, 7, and 8) and finger tighten. Tighten the dia-
phragm cap screws and nuts to 27 NSm (20 lbfSft)
torque in a crisscross pattern.
13. Return the spring adjuster (key 74, figure 6, 7,
and 8) to its original position. Re-adjust the travel stop.

Type 667 Size 30-76 & 87
17
Parts Ordering
Each actuator has a serial number stamped on the
nameplate. Always mention this number when corre-
sponding with your Fisher Controls sales office or
sales representative regarding technical information or
replacement parts. Also, reference the complete
11-character part number of each needed part as
found in the following Parts Kits and Parts List sec-
tions.
Parts Kits
Side-Mounted Handwheels Retrofit Kits
Key Description Part Number
Retrofit Kit includes parts to add a Side-Mounted Handwheel.
Size 34 Push-Down-To-Close 30A8778X0E2
Size 34 Push-Down-To-Open 30A8778X0F2
Size 40 Push-Down-To-Close 30A8778X0G2
Size 40 Push-Down-To-Open 30A8778X0H2
Size 45 & 46 Push-Down-To-Close 40A8779X0A2
Size 45 & 46 Push-Down-To-Open 40A8779X0B2
Size 50 & 60 Push-Down-To-Close 40A8779X0C2
Size 50 & 60 Push-Down-To-Open 40A8779X0D2
Top-Mounted Handwheels Retrofit Kits
Retrofit Kit includes parts to add a Top-Mounted
Handwheel. Kit number 1 includes the handwheel
assembly only. Kit number 2 includes Kit number 1
and a new diaphragm case that is required to
mount the handwheel assembly.
Key Description Part Number
Kit 1
Size 30 30B3940X102
Sizes 34 39B3940X022
Size 40 39B3940X042
Sizes 45 & 50 33B9224X012
Sizes 46, 60, AND 76 33B9224X012
Sizes 70 & 87 CV8060X0012
Kit 2
Size 30 30B3940X052
Size 34 30B3940X062
Size 40 30B3940X092
Sizes 45 & 50 33B9224X022
Sizes 46, 60, & 76 33B9224X032
Sizes 70 & 87 CV8060X0022
Actuator Repair Kits
Parts kit includes keys 8, 9, and 70.
O-ring material is nitrile, and gasket
material is composition.
Key Description Part Number
Size 30 R667X000302
Sizes 34 & 40 R667X000402
Sizes 45 through 60 R667X000502
Sizes 70 & 87 R667X000702
Size 76 R667X000762
Parts List
Actuator Assembly
Key Description Part Number Qty
1 Upper Diaphragm Casing (Steel, zinc plated)
Size 30 2E800728992 1
Sizes 34 & 40 2E681428992 1
Sizes 45 & 50 3E844628992 1
Sizes 46, 60 & 76 3E846728992 1
Sizes 70 & 87 2N127828992 1
w/Top-Mounted Handwheel
Size 30 2E792225062 1
w/Top-Mtd Handwheel or Style 11 Travel Stop
Sizes 34 & 40 2E806325062 1
Sizes 45 & 50 3E831625062 1
Sizes 46, 60 & 76 2E847425062 1
Sizes 70 & 87 2N127125062 1
w/Style 10 or 13 Travel Stop
Size 30 2E792225062 1
w/Style 10 or 12 Travel Stop
Sizes 34 & 40 2E806325062 1
Sizes 45 & 50 3E831625062 1
w/Style 10, 12, or 13 Stop
Sizes 46, 60 & 76 2E847425062 1
w/Style 12 Stop or Reverse Valve
Sizes 70 & 87 2N127125062 1
w/Style 14 Travel Stop
Size 30 2F486225062 1
Sizes 34 & 40 2F753428992 1
Sizes 45 & 50 3F860628992 1
Sizes 46, 60 & 76 1K131025062 1
Sizes 70 & 87 13A2298X012 1
2 Travel Stop Spacer See following table
3* Diaphragm
Molded Nitrile/Nylon
Size 30 2E800002202 1
Sizes 34 & 40 2E669902202 1
Sizes 45 & 50 2E859602202 1
Sizes 46, 60 & 76 2E859802202 1
Sizes 70 & 87 2N130902202 1
Molded Silicone/Polyester
Size 30 18B2713X012 1
Sizes 34 & 40 18B2713X022 1
Sizes 45 & 50 18B2713X032 1
Sizes 46, 60 & 76 18B2713X042 1
Sizes 70 & 87 18B2713X052 1
*Recommended spare parts

Type 667 Size 30-76 & 87
18
Key Description Part Number Qty
4 Upper Diaphragm Plate
Aluminum [93°C (200°F) maximum]
Size 30 31B2028X012 1
Sizes 34 & 40 31B2029X012 1
Sizes 45 & 50 41B2030X012 1
Sizes 46, 60 & 76 41B2031X012 1
Cast Iron
Size 30 2E880419042 1
Sizes 34 & 40 3E880519042 1
Sizes 45 & 50 2E831519042 1
Sizes 46, 60, & 76 2E847519042 1
Sizes 70 & 87 to 76 mm (3-in.) travel 2N127019042 1
Sizes 70 & 87 102 mm (4-in.) travel 10A2421X012 1
Sizes 70 & 87 Type 667-4 10A2421X012 1
WCB Steel
Size 30 2H510922012 1
Sizes 34 & 40 3H511122012 1
Sizes 45 & 50 2H511322012 1
Sizes 46, 60, & 76 2H511522012 1
Sizes 70 & 87 2N757522012 1
7* Bushing, Seal
Brass
Size 30 1E791214012 1
Sizes 34 & 40 1E682814012 1
Sizes 45 through 60 1E845714012 1
Sizes 70, 76 & 87 1N1316X0052 1
S41600 [416 stainless steel (SST)]
Size 30 1E7912X0012 1
Sizes 34 & 40 1E6828X0012 1
Sizes 45 through 60 1E8457X0012 1
PTFE w/25% Glass
Sizes 70, 76 & 87 1N1316X0042 1
8* O-Ring
Nitrile
Size 30 1E591406992 2
Sizes 34 & 40 1D237506992 2
Sizes 45 through 60 1C562206992 2
Sizes 70, 76 & 87 1E736906992 2
Fluoroelastomer
Size 30 1E5914X0062 2
Sizes 34 & 40 1D237506382 2
Sizes 45 through 60 1N285406382 2
Sizes 70, 76, & 87 1N1633X0012 2
9* O-Ring
Nitrile
Sizes 30 through 40 1C415706992 1
Sizes 45 through 87 1E845806992 1
Fluoroelastomer
Sizes 30 through 40 1C4157X0032 1
Sizes 45 through 87 1E8458X0022 1
12 Screw, Cap, hex hd See following table
Key Description Part Number Qty
12 Screw, Cap, hex hd
Standard Handwheel, travel stop style 13, adj.
Up stop style 14, for:
Size 30
6, 8, & 17 mm (1/4, 5/16, & 11/16-inch)
travel 1A8678X0012 1
11, 16, & 19 mm (7/16, 5/8, & 3/4-inch)
travel 1B227523052 1
10, 11, 13,14, & 16 mm (3/8, 7/16, 1/2, 9/16, & 5/8-inch)
travel 1A8678X0032 1
17 & 19 mm (11/16 & 3/4-inch)
travel 1B2275X0022 1
13 Hex hd Cap Screw (steel, zn pl)
Size 30 1E7603X0062 12
Sizes 34 & 40 1E7603X0062 16
Sizes 45 & 50 1A6751X0102 20
Sizes 46, 60 & 76 1A6751X0102 24
Sizes 70 & 87 1A368324052 28
14 Hex Nut (steel, zn pl)
Size 30 1A3465X0092 12
Sizes 34 & 40 1A3465X0092 16
Sizes 45 & 50 1A3465X0092 20
Sizes 46, 60 & 76 1A3465X0092 24
Sizes 70 & 87 1A3465X0092 28
17 Vent Assembly
All Sizes 17A5515X012 1
18 Spring See following table
19 Seat, Lower Spring
G10300 (steel, zn pl)
Size 30 1U425623122 1
Size 34 & 40 1R179923122 1
Size 45 through 60 1R180023122 1
Cast Iron
Standard
Size 70, 76 & 87 1N129619052 1
WCB Steel
Standard
Size 70 & 87 1N757722012 1
Cast Iron
w/handwheel
Size 70, 76 & 87 1N887119042 1
27 Extension Rod Conn (steel, zn pl)
w/Top-Mounted Handwheel
Size 30 1F118824092 1
w/Top-Mtd Handwheel or Style 11
Size 34 & 40 1F135924092 1
27 Extension Rod Conn (steel, zn pl) (Cont.)
Sizes 45 through 60 & 76 1F119424092 1
Steel, zn pl
w/Top-mounted handwheel
Sizes 70 & 87 to 76 mm (3-in.) travel 1N838331012 1
Sizes 70 & 87 w/102 mm (4-in.) travel 11A8130X012 1
30 Hex hd Cap Screw (steel, zn pl)
Size 30 1D529824052 6
Sizes 34 & 40 1A368424052 6
Sizes 45 through 60 & 76 1A368424052 8
Sizes 70 & 87 1N129328992 12
*Recommended spare parts

Type 667 Size 30-76 & 87
19
Figure 6. Type 667 Actuator Sizes 30 through 60
PARTIAL VIEW OF TOPĆLOADED TYPE 667
ACTUATOR SIZES 30 THROUGH 60
APPLY LUBRICANT OR SEALANT
50A8379-C/IL
50A8378-C

Type 667 Size 30-76 & 87
20
Figure 7. Type 667 Size 70 and 76 Actuator
APPLY LUBRICANT
50A8598-E / IL
Key Description Part Number Qty
31 Stem Connector Assembly (steel, zn pl)
Standard
Sizes 30 & 34 18A1243X012 1
Size 40 18A1668X012 1
Sizes 45 & 46 18A1671X012 1
Sizes 50 & 60 18A1672X012 1
Sizes 70 & 76 18A1675X012 1
Size 87 18A1825X012 1
w/Side-Mounted Handwheel
Size 34 1F659225142 1
Size 40 1F659125142 1
Sizes 45 & 46 (SST, Stl) 2F1678000A2 1
Sizes 50 & 60 (SST, Stl) 2F1672000A2 1
Size 70 19 to 76 mm (3/4 through 3-in.)
travel (SST, Stl) 18A1678X012 1
Size 70 19 to 102 mm (3/4 through 4-in.)
travel 21A8254X012 1
Size 76 18A1678X012 1
Size 87 25.4 mm (1-in.) valve stem 18A1825X012 1
Size 87 31.8 mm (1-1/4 in.) valve stem 18A1833X012 1
Key Description Part Number Qty
31 Stem Connector Assembly (steel, zn pl) (Con’t.)
w/PMV Positioner
Size 70 19 to 102 mm (3/4 to 4-in.)
Travel 11B2000X012 1
32 Travel Indicator Scale See following table
33 Screw, Self Tapping
Stainless Steel
Standard
Size 30 through 46 1E793238992 2
Size 50 through 87 1E831338992 2
33 Screw, Mach, Fill hd (steel, plated)
w/handwheel
Sizes 45 & 46 1B992528992 2
Sizes 70, 76 & 87 1A340628982 2