Fisher 655 User manual

D100305X012

Type

s 6

5 a

d 6

R A

ctuators

r S

elf-Operate

d C

ontrol

Contents

Introduction

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Scope of Manual 1.

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Description 2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Specifications 2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Actuator Mounting 3.

. . . . . . . . . . . . . . . . . . . . . . . . . .

Loading Connections 6.

. . . . . . . . . . . . . . . . . . . . . . . .

Startup

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Startup for Pressure-Reducing Service 6.

. . . . . . . . .

Startup for Pressure-Relief Service 6.

. . . . . . . . . . . .

Adjustment for Pressure-Reducing or

Pressure-Relief Service 6.

. . . . . . . . . . . . . . . . . . .

Shutdown

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maintenance

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Actuator 7

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Disassembly 7

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Assembly 8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Top-Mounted Handwheel 8.

. . . . . . . . . . . . . . . . . . . .

Disassembly 9

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Assembly 9

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts Ordering

. . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts List

10.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Introduction

Scope of Manual

This instruction manual provides installation, adjust-

ment, maintenance, and parts ordering for the Type

655 and 655R actuators and the top-mounted hand-

wheel. Refer to separate instruction manuals for in-

formation about valves and accessories used with

these actuators.

Only personnel qualified through training or experience

should install, operate, and maintain the Type 655 and

655R actuators. If you have any questions about these

instructions, contact your Fisher Controls sales office

or sales representative before proceeding.

Figure1. T

ype 655-ED Pressure-Reducing V

alve

Figure 2. T

ype 655 Actuator Nameplate

1F9408-E / DOC

W0466-1 / IL

Instruction Manual

Form 1292

October 1997 Type 655 and 655R

Type 655 and 655R

Table1. Specifications

Actuator Sizes and Maximum Casing Pressures

ACTUATOR MAXIMUM CASING PRESSURE

ACTUATOR

SIZE Psig Bar

3A, 4A 250 17.2

3B, 4B 175 12.1

32, 42 100 6.9

33, 43 65 4.5

34, 44 45 3.1

35, 45 30 2.1

36, 46 15 1.0

Actuator Pressure Setting Ranges

See table 2

Actuator Yoke Boss and Valve Stem Connection

Diameters

Sizes 3A through 36: 2-1/8 inch (54 mm) yoke

boss with 3/8 inch (9.5 mm) stem connection

Sizes 4A through 46: 2-13/16 inch (71 mm) yoke

boss with 1/2 inch (12.7 mm) stem connection

Maximum Travel

Sizes 3A and 4A: 7/16 inch (11 mm) plus 1/8 inch

(3 mm) for seating

All Other Sizes: 3/4 inch (19 mm) plus 1/8 inch (3

mm) for seating

Effective Diaphragm Area

See table 3

Spring Rate

See key 6 in the parts list section

Temperature Capabilities

–20 to 180F (–29 to 82C) with standard dia-

phragm material. For the fluid and temperature ca-

pabilities of nonstandard diaphragm materials, con-

sult your Fisher Controls sales office or sales

representative

Casing Pressure Connections

1/2 inch NPT female

Approximate Weights

ACTUATOR APPROXIMATE WEIGHT

ACTUATOR

SIZE Lb Kg

3A, 3B, 32, 33 45 20

34, 35, 36 50 23

4A, 4B, 42, 43 65 29

44, 45, 46 75 34

Description

Type 655 and 655R actuators (figure 1) are pressure-

actuated, spring-and-diaphragm actuators used in

conjunction with various valves to provide control for a

wide variety of pressure regulation applications. Type

655 actuators are used for pressure-reducing service

when mounted on push-down-to-close valves such as

the Design ED, EK, and ET valves. Type 655R actua-

tors are used for pressure-relief service when mounted

on push-down-to-open valves such as the Design

EDR, EKR, and ETR valves. Both types are self-oper-

ated and direct-acting; that is, increasing pressure in

the diaphragm casing forces the actuator stem down-

ward, and decreasing the pressure allows the actuator

spring to lift the actuator stem upward.

Specifications

Specifications for the Type 655 and 655R actuators

are shown in table 1. Information for a specific actua-

tor is also found on the nameplate (figure 2) of that

actuator.

Installation

WARNING

To avoid personal injury or property

damage caused by bursting of pressure-

retaining parts, be certain the service

conditions do not exceed the casing

pressure limits listed in table 1. Use

pressure-limiting or pressure-relieving

devices to prevent service conditions

from exceeding these limits.

Type 655 and 655R actuators are normally shipped

mounted on a valve. Refer to the appropriate valve

instruction manual when installing the valve in the

pipeline. If the actuator is shipped separately or if it is

necessary to mount the actuator on the valve, perform

the procedures described in the

Actuator Mounting

portion of this section.

Before installing the actuator, inspect it for any dam-

age. Also, keep any adjacent piping clean and free of

pipe scale or other debris that could possibly disrupt

service. It is recommended that a strainer be installed

Type 655 and 655R

in the pipeline ahead of the regulator or relief valve to

protect it while in service. And a conventional three-

valve bypass (see figure 3) should be placed around

the regulator or relief valve to permit continuous op-

eration when it is being installed or repaired.

Actuator Mounting

The actuator may be installed either above or below

the pipeline. If the regulator or relief valve is to be

used for steam service, the valve should be installed

with the actuator positioned below the pipeline, and

the control line should be sloped down toward the dia-

phragm casing. This is to ensure that any forming con-

densate will maintain a water seal to protect the dia-

phragm.

The following procedure describes how to mount the

actuator on either a push-down-to-close or a push-

down-to-open valve so that the actuator stem and

valve stem thread engagement will allow full travel and

proper shutoff. Refer to figure 4 for actuator mounting

components. Key numbers refer to figure 5 unless

otherwise stated.

1. Turn the adjusting screw (key 10) into the yoke

(key 7) to force the diaphragm (key 2) and diaphragm

plate (key 4) against the upper diaphragm casing (key

1).

2. Perform the following steps as appropriate for ei-

ther push-down-to-close or push-down-to-open valve

action.

CAUTION

In the following procedures, do not ro-

tate the valve plug while it is seated

since this may cause damage to the

seating surfaces and thereby allow ex-

cessive leakage. Also, during travel ad-

justment, use tools carefully to avoid

damaging the valve plug stem. A dam-

aged stem could cut the packing and

allow leakage.

For Push-Down-To-Close Valves:

a. Place the actuator part way over the valve stem.

Then, place the yoke locknut over the valve stem,

and slide the travel indicator disk (key 11, if used)

on top of the hex nuts (key 12).

b. Set the actuator onto the valve body. The length

of the valve stem will prevent the actuator yoke

(key 7) from sitting on the bonnet properly. Mea-

sure the distance from the bottom of the actuator

yoke to the mating shoulder on bonnet, and then

add the valve plug travel to this measurement.

c. Raise the actuator so the valve plug can be

lifted off the seat ring.

Note

Either turn the actuator, or tighten the

hex nuts together, and use a wrench on

the hex nuts to turn the valve plug and

stem assembly.

Thread the valve stem into the actuator stem the dis-

tance measured in the previous step.

d. Lower the actuator onto the valve body bonnet,

and tighten the yoke locknut.

e. Connect the pressure control lines as described

in the

Loading Connection

portion of this section.

f. Stroke the actuator, and measure the stem

movement to check travel. If the movement is more

than full travel, turn the valve stem out of the actua-

tor stem the amount of over-travel. If movement is

less than full travel, turn the valve stem into the

actuator stem the amount of under-travel.

For Push-Down-To-Open Valves:

a. Place the actuator, yoke locknut, and travel indi-

cator disk (key 11, if used) over the valve stem .

Support the actuator above the valve body so the

actuator stem and valve stem do not contact when

the valve plug is seated.

b. Connect the pressure control lines as described

in the

Loading Connection

portion of this section.

c. Move the valve plug, by hand, from the seated

to the open position, and make sure that valve

stem movement corresponds to the desired travel.

d. Stroke the actuator until the diaphragm plate

(key 4) contacts the down travel stop (see figure 4).

e. With the valve plug positioned as described in

step c above, lower the actuator until the actuator

stem contacts the valve stem, and measure the

distance from the bottom of the actuator yoke to

the mating shoulder on the bonnet.

f. Thread the valve stem into the actuator stem

until the thread engagement is equal to the dis-

tance measured in the previous step. Tighten the

hex nuts (key 12) together, and use a wrench to

turn the valve plug and stem assembly.

Type 655 and 655R

Table 2. Actuator Pressure-Setting Ranges

(1)

ACTUATOR

SPRING

ART

PRESSURE

REDUCTION PRESSURE

RELIEF

ACTUATOR

SPRING PART

PRESSURE

REDUCTION PRESSURE

RELIEF

ACTUATOR

SIZE

SPRING

PART

NUMBER Minimum Maximum Minimum Maximum

ACTUATOR

SIZE

SPRING

PART

NUMBER Minimum Maximum Minimum Maximum

SIZE

NUMBER

Psig Bar Psig Bar Psig Bar Psig Bar

SIZE

NUMBER

Psig Bar Psig Bar Psig Bar Psig Bar

1E7924

27082

78 5.4 174 12.0 65 4.5 146 10.1

1E7933

27082

13 0.9 28 1.9 11 0.8 23 1.6

1F7143 27092 44 3.0 135 9.3 43 3.0 119 8.2 44 1E7954

27082

11 0.8 23 1.6 9.0 0.6 19 1.3

3A,

1F1769 27092 32 2.2 96 6.6 37 2.6 85 5.9 1E7924

27082

9.0 0.6 20 1.4 7.0 0.5 16 1.1

1F1768 27092 26 1.8 78 5.4 34 2.3 75 5.2

34 44

1F7143

27092

5.0 0.3 16 1.1 5.0 0.3 13 0.9

1F1767 27032 19 1.3 59 4.1 20 1.4 57 3.9 34, 44 1F1769

27092

3.8 0.3 11 0.8 4.0 0.3 10 0.7

1E7933 27082

50 3.4 107 7.4 43 3.0 64 4.4 1F1768

27092

2.8 0.2 8.5 0.6 2.0 0.1 8.5 0.6

1E7954 27082

42 2.9 92 6.3 35 2.4 64 4.4

1E7933

27082

8.3 0.6 18 1.2 7.0 0.5 11 0.8

1E7933

27082

50 3.4 107 7.4 43 3.0 89 6.1 35 1E7954

27082

7.0 0.5 15 1.0 5.5 0.4 11 0.8

4B 1E7954

27082

42 2.9 92 6.3 35 2.4 77 5.3

1E7933

27082

8.3 0.6 18 1.2 7.0 0.5 15 1.0

1E7924

27082

35 2.4 78 5.4 29 2.0 64 4.4 45 1E7954

27082

7.0 0.5 15 1.0 5.5 0.4 13 0.9

3B,

1F7143 27092 20 1.4 60 4.1 19 1.3 53 3.7 1E7924

27082

5.8 0.4 13 0.9 5.0 0.3 11 0.8

1F1769 27092 14 1.0 43 3.0 17 1.2 38 2.6 1F7143

27092

3.3 0.2 10 0.7 3.2 0.2 9.0 0.6

1E7933 27082

32 2.2 65 4.5 26 1.8 38 2.6

35 45

1F1769

27092

2.4 0.2 7.2 0.5 2.8 0.2 6.3 0.4

1E7954 27082

26 1.8 55 3.8 22 1.5 38 2.6 35, 45 1F1768

27092

2.0 0.1 5.9 0.4 2.5 0.2 5.5 0.4

1E7933 27082

32 2.2 65 4.5 26 1.8 53 3.7 1F1767

27032

1.5 0.1 4.4 0.3 1.5 0.1 4.2 0.3

1E7954 27082

26 1.8 55 3.8 22 1.5 45 3.1 1F7144 27112 1.0 0.07 2.9 0.2 1.3 0.09 2.8 0.2

32 42

1E7924

27082

22 1.5 47 3.2 18 1.2 38 2.6

1E7933

27082

5.8 0.4 13 0.9 5.0 0.3 7.7 0.5

32, 42 1F7143 27092 12 0.8 36 2.5 12 0.8 31 2.1 36 1E7954

27082

4.9 0.3 11 0.8 4.2 0.3 7.7 0.5

1E7933

27082

19 1.3 40 2.8 16 1.1 24 1.7

1E7933

27082

5.8 0.4 13 0.9 5.0 0.3 11 0.8

33 1E7954

27082

16 1.1 34 2.3 13 0.9 24 1.7 46 1E7954

27082

4.9 0.3 11 0.8 4.2 0.3 9.0 0.6

1E7933

27082

19 1.3 40 2.8 16 1.1 33 2.3 1E7924

27082

4.1 0.3 9.2 0.6 3.5 0.2 7.7 0.5

43 1E7954

27082

16 1.1 34 2.3 13 0.9 28 1.9 1F7143

27092

2.3 0.2 7.1 0.5 2.3 0.2 6.3 0.4

1E7924

27082

14 1.0 29 2.0 11 0.8 24 1.7 1F1769

27092

1.7 0.1 5.1 0.4 2.0 0.1 4.5 0.3

33, 43 1F7143 27092 7.0 0.5 22 1.5 7.0 0.5 20 1.4 36, 46 1F1768

27092

1.3 0.09 4.2 0.3 1.8 0.1 4.0 0.3

1F1769 27092 5.2 0.4 16 1.1 5.0 0.3 16 1.1

1F1767

27032

1.0 0.07 3.1 0.2 1.1 0.08 3.0 0.2

1E7933 27082

13 0.9 28 1.9 11 0.8 16 1.1 1F7144 27112 0.7 0.05 2.1 0.1 0.9 0.06 2.0 0.1

34 1E7954

27082

11 0.8 23 1.6 9.0 0.6 16 1.1 1F7130 27112 0.34 0.02 1.1 0.08 0.7 0.05 1.0 0.07

1. Effects of packing box friction, unbalance, and weight of valve plug not considered in calculations.

Figure3. Typical Installation Schematics

13A6502-A

13A6503-A

A1628-1 / IL    

Type 655 and 655R

Table 3. Effective Diaphragm Area

(1)

ACTUATOR

TRAVEL DOWN FROM UPPER CASING STOP, IN. (mm)

ACTUATOR

SIZE

0 1/8 (3) 3/16 (5) 1/4 (6) 3/8 (10) 7/16 (11) 1/2 (13) 9/16 (14) 3/4 (19) 7/8 (22)

SIZE In.2Cm2In.2Cm2In.2Cm2In.2Cm2In.2Cm2In.2Cm2In.2Cm2In.2Cm2In.2Cm2In.2Cm2

3A, 4A

10.2 66 9.6 62 9.5 61 9.4 61 9.2 59 9.1 59 8.9 57 8.7 56 - - - - - - - - - - - -

3B, 4B

23.5 152 21.6 139 21.1 136 20.8 134 20.5 132 20.3 131 20.1 130 19.8 128 18.1 117 16.0 103

32, 42 40.0 258 36.4 235 35.2 227 34.2 221 32.6 210 31.8 205 31.0 200 30.3 195 28.2 182 26.4 170

33, 43 63.0 406 58.0 374 56.8 366 55.5 358 53.5 345 52.7 340 52.0 335 51.2 330 49.3 318 47.6 307

34, 44 93.0 600 84.8 547 82.8 534 81.0 523 78.8 508 77.8 502 77.0 497 76.0 490 73.5 474 72.0 465

35, 45 134.0 865 129.2 834 127.2 821 125.4 809 122.2 788 120.5 777 119.0 768 117.6 759 114.1 736 112.0 723

36, 46 190.0 1230 181.5 1170 179.0 1150 177.0 1140 173.5 1120 172.3 1110 171.0 1100 169.8 1100 166.5 1070 163.5 1050

1. For the spring rates of a particular spring, see key 6 in the Parts List section.

Figure4. Actuator/V

alve Components

DV3742-B

DH4667-B

31A0223-B

B0816-1 / IL    

Type 655 and 655R

g. Lower the actuator onto the valve body bonnet,

and tighten the yoke locknut.

h. Stroke the actuator, and measure the stem

movement to check travel. If the movement is more

than full travel, turn the valve stem into the actuator

stem the amount of over-travel. If the movement is

less than full travel, turn the valve stem out of the

actuator stem the amount of under-travel.

3. After correct travel has been obtained, tighten the

hex nuts (key 12) against the actuator stem (key 8),

and tighten the yoke locknut with a hammer and

punch.

Note

Changing the spring adjustment will not

change the actuator pressure range for

that particular spring (see table 2).

Changing the spring adjustment merely

shifts the position of the spring either

up or down so that valve travel can

coincide with the actuator pressure set-

ting range.

4. While monitoring loading pressure with a pressure

gauge, stroke the actuator, and then turn the adjusting

screw until the valve begins to travel at the desired

pressure. Turn the adjusting screw out of the yoke to

decrease spring compression and thus allow the valve

to begin travel at a lower loading pressure. Turn the

adjusting screw into the yoke to increase spring com-

pression and thus allow the valve to begin travel at a

higher loading pressure.

Loading Connections

Install the control line following the steps listed below.

Typical installations are shown in figure 3.

1. Connect the control line into either the upstream

pipeline for pressure-relief service or into the down-

stream pipeline for pressure-reducing service as

shown in figure 3. Make the pipeline tap at least four

to eight pipe diameters away from the regulator or re-

lief valve, or any elbow, swage, or nipple, to avoid ab-

normal velocities or turbulence.

2. Connect the other end of the control line to the

1/2-inch NPT connection in the center of the upper

diaphragm casing (key 1) or to the connection in the

handwheel body (key 28, figures 6 and 7; key 142,

figure 8).

3. Fit the control line with a large-port needle valve.

Partially closing or throttling this valve will tend to

dampen any cycling or pulsating action of the regula-

tor. Never completely close the needle valve while the

regulator is in operation.

Startup

The procedures for placing into operation and adjust-

ing the equipment for both pressure-reducing and

pressure-relief applications are described below. Typi-

cal installation schematics are shown in figure 3.

Startup For Pressure-Reducing Service

1. Open the needle valve in the control line.

2. Open the downstream shutoff valve.

3. Close the valve in the bypass line.

4. Slowly open the upstream shutoff valve.

Startup For Pressure-Relief Service

1. Open the needle valve in the control line.

2. Open the downstream shutoff valve.

3. Slowly open the upstream shutoff valve.

4. Close the valve in the bypass line.

Adjustment For Pressure-Reducing or

Pressure-Relief Service

The actuator is factory-set as specified on the order,

and the pressure range is stamped on the nameplate

(figure 2). If a pressure setting other than the one spe-

cified is desired, change the pressure setting by fol-

lowing the procedures listed below. Be sure to change

the nameplate to indicate the new pressure setting.

The new pressure setting must not exceed the limits

given in tables 1 and 2 or in any applicable codes.

CAUTION

To protect equipment in the process

system from a sudden release of pres-

sure, always use a pressure gauge to

monitor pressure when making adjust-

ments.

To adjust the downstream pressure setting for pres-

sure-reducing service, or the upstream pressure set-

ting for pressure-relief service, proceed as follows. To

decrease the pressure setting, turn the adjusting

screw (key 10, figure 5) clockwise; to increase the

pressure setting, turn the adjusting screw counter-

clockwise. If the spring does not provide the required

pressure setting, replace it through the following steps:

1. Disassemble the actuator by following steps 1, 3

and 4 of the

Disassembly

portion of the

Maintenance

section.

2. Remove the diaphragm (key 2). Then, unscrew the

cap screw (key 3), and lift the diaphragm plate (key 4)

out of the actuator body.

Type 655 and 655R

3. Replace the spring and reassemble the actuator by

following steps 5 and 6 of the

Assembly

portion of the

Maintenance

section.

Shutdown

For both pressure-reducing and pressure-relief ap-

plications, refer to figure 3, and follow the procedures

described below.

1. Close the upstream shutoff valve slightly.

2. Slowly open the bypass valve while monitoring

downstream pressure.

3. Slowly close the downstream shutoff valve.

4. Close the upstream shutoff valve.

5. Close the needle valve in the control line.

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.

WARNING

Avoid personal injury or property dam-

age from sudden release of pressure,

uncontrolled process fluid, or precom-

pressed spring force. Before starting

disassembly:

DIsolate the regulator or relief valve

from the system pressure, and relieve all

internal pressure

DRelease spring compression as de-

scribed in step 2 of the Disassembly

section

The maintenance instructions are divided into two sec-

tions:

Actuator

and

Top-Mounted Handwheel

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 refer to figure 5.

Disassembly

CAUTION

In the following procedure, do not rotate

the valve plug while it is seated since

this may cause damage to the seating

surfaces and thereby allow excessive

leakage. Also, during travel adjustment,

use tools carefully to avoid damaging

the valve plug stem. A damaged stem

could cut the packing and allow leak-

age.

1. Rotate the handwheel (if one is used) counterclock-

wise to be sure the handwheel is not compressing the

spring (key 6).

2. For complete disassembly, the actuator must be

removed from the valve, and the actuator stem (key 8)

must be completely disengaged from the valve plug

stem by rotating the actuator. Perform the appropriate

procedure according to the respective valve action.

For Push-Down-To-Close Valves:

Note

To prevent the actuator stem (key 8)

from rotating while performing the fol-

lowing procedure, make sure the adjust-

ing screw (key 10) remains screwed into

the yoke (key 7).

a. Loosen the two hex nuts (key 12).

b. Loosen the yoke locknut (figure 4) with a ham-

mer and punch, and unscrew it from the valve bon-

net.

c. While lifting the actuator so that the valve plug is

not forced against the seat, rotate the entire actua-

tor until the actuator stem disengages completely

from the valve plug stem.

For Push-Down-To-Open Valves:

a. Turn the adjusting screw (key 10) counterclock-

wise to relieve all spring compression. Then, move

the valve plug, by hand, off the seat.

b. Loosen the hex nuts (key 12), and unscrew the

valve plug stem out of the actuator stem as far as it

will go.

c. Turn the adjusting screw into the yoke (key 7) to

force the diaphragm (key 2) and diaphragm plate

(key 4) against the upper diaphragm casing (key 1).

d. Loosen the yoke locknut (figure 4) with a ham-

mer and punch, and unscrew it from the valve bon-

net.

Type 655 and 655R

e. Rotate the entire actuator until the actuator

stem disengages from the valve plug stem.

3. Turn the adjusting screw (key 10) counterclockwise

out of the yoke (key 7) to relieve all spring compres-

sion.

4. To remove the upper diaphragm casing (key 1),

unscrew the cap screws (key 19) for size 3A and 4A

actuators or the cap screws and hex nuts (keys 19

and 20) for all other sizes.

5. Remove the diaphragm (key 2); then, lift the dia-

phragm plate (key 4) and actuator stem assembly out

of the actuator body. Also, remove the spring and the

lower spring seat (key 9).

6. For size 3A and 4A actuators, remove the lower

diaphragm casing (key 5).

7. Remove the cap screw (key 3), and separate the

diaphragm plate from the actuator stem.

8. For size 3B through 46 actuators, unscrew the cap

screws (key 21), and remove the lower diaphragm

casing (key 5). Some Type 655R actuators will have

travel stops (key 13, not shown) in place of three of

these six cap screws.

9. If a top-mounted handwheel assembly is used, re-

fer to steps 4 through 8 of the

Disassembly

portion of

the

Top-Mounted Handwheel

section.

Assembly

This procedure assumes that the actuator is complete-

ly disassembled. If it is not, start the instructions at the

appropriate step.

1. Before starting assembly, apply Molykote No. 77 or

equivalent lubricant to the threads and the bearing end

of the adjusting screw (key 10) as indicated in figure 5

by the letter A.

2. For size 3A and 4A actuators, set the lower dia-

phragm casing (key 5) onto the yoke (key 7).

3. For size 3B through 46 actuators, install the lower

diaphragm casing (key 5), and secure it with the cap

screws (key 21). Some Type 655R actuators will have

travel stops (key 13, not shown) in place of three of

these six cap screws.

4. Install the lower spring seat (key 9) and the actua-

tor spring (key 6).

Note

To take some of the slack out of the dia-

phragm (key 2) at the bolt circle, turn the

adjusting screw into the yoke (key 7) to

raise the diaphragm plate (key 4). This

will also ensure that the diaphragm will

have enough slack inside the casings for

efficient travel.

5. Secure the diaphragm plate (key 4) to the actuator

stem (key 8) with the cap screw (key 3), and install

this assembly into the actuator. Install the diaphragm,

making sure that the patterned side of the diaphragm

is next to the diaphragm plate.

Note

When replacing the upper diaphragm

casing (key 1), be sure there are no

wrinkles in the diaphragm that might

cause the diaphragm to tear or allow

leakage.

6. Place the upper diaphragm casing onto the lower

diaphragm casing. For size 3A and 4A actuators, se-

cure the casings with the cap screws (key 19). For all

other actuator sizes, secure the casing with the cap

screws and hex nuts (keys 19 and 20). Tighten the

cap screws to no more than 20 foot-pounds (27 new-

ton-meters) of torque using an even, crisscross pat-

tern.

7. Mount the actuator onto the valve by following the

procedures outlined in the

Actuator Mounting

portion

of the installation section.

8. Connect the pressure control line by following the

procedures outlined in the

Loading Connections

por-

tion of the

Installation

section.

9. To start up and adjust the actuator, follow the pro-

cedures outlined in the

Startup

section of this instruc-

tion manual.

Top-Mounted Handwheel

Top-mounted handwheel assemblies (figures 6, 7 and

8) are usually used as adjustable travel stops to limit

full upward travel of the actuator stem. Turning the

handwheel clockwise forces the actuator stem down-

ward, while turning the handwheel counterclockwise

allows the spring to force the actuator stem upward. If

the actuator is used with a push-down-to-close valve,

full opening of the valve plug can be restricted through

the appropriate positioning of the top-mounted hand-

wheel. If the actuator is used with a push-down-to-

open valve, closing of the valve plug can be restricted

by using the handwheel. A locknut (key 27, figures 6

and 7; key 137, figure 8) is used to hold the hand-

wheel in position.

Instructions are given below for complete disassembly

and assembly. Perform the disassembly only as nec-

essary to accomplish the required maintenance; then,

begin the assembly at the appropriate step.

Key numbers refer to figure 6 for size 3A and 4A, fig-

ure 7 for size 3B and 4B, and figure 8 for size 32

through 46 top-mounted handwheel assemblies.

Type 655 and 655R

Disassembly

1. Bypass the control valve. Relieve all loading pres-

sure, and remove the tubing or pipe from the hand-

wheel body.

2. Loosen the hex nut (key 27, figures 6 and 7; key

137, figure 8). Turn the adjusting screw (key 10, figure

5) and the handwheel (key 25, figures 6 and 7; key 51,

figure 8) counterclockwise to relieve all compression.

3. For size 3A and 4A actuators, remove the cap

screws (key 19, figure 5), and lift the handwheel body

(key 28, figure 6) off the actuator.

4. For size 3B through 46 actuators, remove the cap

screws and hex nuts (keys 19 and 20, figure 5), and

then lift off the upper diaphragm casing (key 1, figure

5) and handwheel assembly. To replace the O-ring

(key 139, figure 8) or for ease of handling, separate

the handwheel assembly from the upper diaphragm

casing. This can be accomplished by removing the

cap screws that secure the handwheel assembly to

the upper diaphragm casing (key 33, figure 7; key 141,

figure 8).

5. Turn the handwheel clockwise two or three turns.

Remove the hex nut (key 22, figures 6 and 7; key 54,

figure 8) and washer (key 24, figures 6 and 7; key 134,

figure 8), and lift off the handwheel.

6. Unscrew the locknut (key 27, figures 6 and 7; key

137, figure 8) from the handwheel stem (key 26, fig-

ures 6 and 7; key 133, figure 8), and then remove the

handwheel stem through the bottom of the handwheel

body (key 28, figures 6 and 7; key 142, figure 8). A

screwdriver slot in the top of the handwheel stem is

provided for this purpose.

7. Check the O-ring (key 29, figures 6 and 7; key 138,

figure 8), and replace it if necessary.

8. To complete disassembly, drive out the groove pin

(key 31, not shown; key 140, figure 8), and slide the

pusher plate (key 32, figures 6 and 7; key 135, figure

8) off the handwheel stem. For Type 655, size 3B and

4B actuators, a travel stop (key 34, figure 7) should

also be removed with these parts.

Assembly

This procedure assumes that the handwheel assembly

is completely disassembled. If it is not, start the

instructions at the appropriate step.

1. During assembly, apply Lubriplate MAG-1 lubricant

(key 241) or equivalent to the handwheel stem and

threads, the pusher, and to the O-rings as shown in

figures 6, 7 and 8.

2. Slide the pusher plate (key 32, figures 6 and 7; key

135, figure 8) onto the handwheel stem, and, if neces-

sary, insert the groove pin (key 31, not shown; key

140, figure 8). For Type 655, size 3B and 4B actua-

tors, a travel stop (key 34, figure 7) should also be in-

serted on the handwheel stem with these parts.

3. Insert the handwheel stem into the handwheel body

(key 28, figures 6 and 7; key 142, figure 8); then,

screw the hex nut (key 27, figures 6 and 7; key 137,

figure 8) onto the handwheel stem.

4. Install the handwheel (key 25, figures 6 and 7; key

51, figure 8) and washer (key 24, figures 6 and 7; key

134, figure 8) onto the handwheel stem, and secure it

with the hex nut (key 22, figures 6 and 7; key 54, fig-

ure 8).

5. For size 3A and 4A actuators, set the handwheel

body onto the actuator, and secure it with the cap

screws (key 19, figure 5). Tighten the cap screws to

no more than 20 foot-pounds (27 newton-meters) of

torque using an even, crisscross pattern.

6. For size 3B through 46 actuators, set the upper

diaphragm casing (key 1, figure 5) and handwheel as-

sembly onto the actuator body, and secure it with the

cap screws and hex nuts (keys 19 and 20, figure 5).

Tighten the cap screws to no more than 20 foot-

pounds (27 newton-meters) of torque using an even,

crisscross pattern.

7. Connect the pressure control line to the top-

mounted handwheel assembly by following the proce-

dures outlined in the

Loading Connections

portion of

the

Installation

section.

8. To start up and adjust the actuator, follow the pro-

cedures outlined in the

Startup

section of this instruc-

tion manual.

Parts Ordering

When corresponding with your Fisher Controls sales

office or sales representative about this equipment,

refer to the serial number found on the actuator name-

plate (key 17, figure 5). Also, specify the complete

11-character part number from the following parts list

when ordering replacement parts.

Type 655 and 655R

Parts

List

Actuator

Key Description Part Number

Upper Diaphragm Casing

Cast iron

Sizes 3A & 4A 1F724419012

Sizes 3B & 4B

W/o top-mounted handwheel 2F725319012

W/top-mounted handwheel 2F725419012

Steel

Sizes 3A & 4A 1H375822012

Sizes 3B & 4B

W/o top-mounted handwheel 2R877622012

W/top-mounted handwheel 2H567022012

Sizes 32 & 42

W/o top-mounted handwheel 2F581228992

W/top-mounted handwheel 2F581125062

Sizes 33 & 43

W/o top-mounted handwheel 2F747828992

W/top-mounted handwheel 2E801125062

Sizes 34 & 44

W/o top-mounted handwheel 2F747928992

W/top-mounted handwheel 2E682625062

Sizes 35 & 45

W/o top-mounted handwheel 2F748028992

W/top-mounted handwheel 3F649825062

Sizes 36 & 46

W/o top-mounted handwheel 2F748128992

W/top-mounted handwheel 3F699925062

Diaphragm, neoprene

Sizes 3A & 4A 1F725102192

Sizes 3B & 4B 1F725902192

Sizes 32 & 42

W/o top-mounted handwheel 1F702202112

W/ top-mounted handwheel 1F702202192

Sizes 33 & 43

W/o top-mounted handwheel 1F702302112

W/ top-mounted handwheel 1F7023X0012

Sizes 34 & 44

W/o top-mounted handwheel 1F702402112

W/ top-mounted handwheel 1F7024X0022

Sizes 35 & 45

W/o top-mounted handwheel 1F702502112

W/ top-mounted handwheel 1F7025X0022

Sizes 36 & 46

W/top-mounted handwheel 1F7026X0012

3 Cap Screw, cd pl steel

Sizes 3A & 4A thru sizes 33 & 43 1E760432992

Sizes 34 & 44 1F710532982

Sizes 35 & 45, 36 & 46 1F710632992

4 Diaphragm Plate, cast iron

Sizes 3A & 4A

Type 655 1F724719042

Type 655R

7/16 in. (11 mm) travel 1F724919042

5/8 in. (16 mm) travel 1F724819042

3/4 in. (19 mm) travel 1F724719042

Key Description Part Number

4 Diaphragm Plate (Continued)

Sizes 3B & 4B

Type 655 1F725619042

Type 655R

7/16 in. (11 mm) travel 1F725819042

5/8 in. (16 mm) travel 1F725719042

3/4 in. (19 mm) travel 1F725619042

Sizes 32 & 42 2F649719042

Sizes 33 & 43 2F649319042

Sizes 34 & 44 2F649419042

Sizes 35 & 45 2F649519042

Sizes 36 & 46 2F649619042

Lower Diaphragm Casing

Sizes 3A & 4A

Cast iron 1F724519012

Steel 1J409522012

Sizes 3B & 4B

Cast iron 2F725419012

Steel 2H567022012

Sizes 32 & 42, steel 2F581125062

Sizes 33 & 43, steel 2E801125062

Sizes 34 & 44, steel 2E682625062

Sizes 35 & 45, steel 3F649825062

Sizes 36 & 46, steel 3F699925062

6 Spring See following table

7 Yoke

Sizes 3A thru 36

Cast iron 2E869619042

Steel 2H786522012

Sizes 4A thru 46

Cast iron 3E807019042

Steel 3H786722012

8 Actuator Stem, cd pl steel

Sizes 3A thru 36 1F581524102

Sizes 4A thru 46 1F581424102

9 Lower Spring Seat,

zn pl steel 1R179923122

10 Adjusting Screw,

cd pl steel 1E807324102

11 Travel Indicator Disk, stainless steel

(optional)

Sizes 3A thru 36 1E793138992

Sizes 4A thru 46 1E807538992

12 Hex Nut, cd pl steel (2 req’d)

Sizes 3A thru 36 1P131224142

Sizes 4A thru 46 1A353724122

13 Travel Stop, steel (3 req’d) (not shown)

Type 655R sizes 32 thru 46 only

7/16 in. (11 mm) travel 1F709224092

5/8 in. (16 mm) travel 1F709124092

3/4 in. (19 mm) travel

(none req’d)

14 Screw, stainless steel (2 req’d)

(optional) 1E793238992

15 Travel Indicator Scale, stainless steel

(optional)

Sizes 3A thru 36

7/16 in. (11 mm) travel 1E793438992

5/8 in. (16 mm) travel 1E793538992

3/4 in. (19 mm) travel 1E793638992

Sizes 4A thru 46

7/16 in. (11 mm) travel 1E807638992

5/8 in. (16 mm) travel 1E807738982

3/4 in. (19 mm) travel 1E808138992

*Recommended spare parts

Type 655 and 655R

Key Description Part Number

16 Twin Speed Nut, stainless steel

(not shown)(optional)

Sizes 3A thru 36 1E793938992

Sizes 4A thru 46 1E808438992

17 Nameplate,

stainless steel 1F9408X00A2

18 Drive Screw, stainless steel

(4 req’d)

1A368228982

19 Cap Screw, steel

Sizes 3A & 4A (6 req’d) 1F725024052

Sizes 3B & 4B (12 req’d) 1J768924052

Sizes 32, 33, 42, & 43 (12 req’d) 1E760324052

Sizes 34 & 44 (16 req’d) 1E760324052

Sizes 35 & 45 (20 req’d) 1A675124052

Sizes 36 & 46 (24 req’d) 1A675124052

20 Hex Nut, cd pl steel

Sizes 3A & 4A (none req’d)

All other sizes (quantity req’d same as key 19) 1A346524122

21 Cap Screw, cd pl steel

Sizes 3B & 4B (6 req’d) 1A560632982

All other sizes

W/o travel stops (6 req’d) 1A368424052

W/travel stops (3 req’d) 1A368424052

Top-Mounted Handwheel

Sizes 3A, 4A, 3B & 4B

22 Hex Jam Nut

Cd pl steel 1A353724122

24 Washer, cd pl steel 1A518925072

25 Handwheel, cast iron 1F143819042

26 Handwheel Stem, bronze

Sizes 3A & 4A 38A1218X012

Sizes 3B & 4B 27A9644X012

Key Description Part Number

27 Hex Jam Nut

Cd pl steel 18A2300X012

28 Handwheel Body, cast iron

Sizes 3A & 4A, 1/2 in. supply connection 38A1218X012

Sizes 3B & 4B

1/4 in. supply connection 37A9439X012

1/2 in. supply connection 37A9440X012

29* O-Ring, nitrile 1D237506992

30* O-Ring, nitrile (not shown)

Sizes 3B & 4B only 1D267306992

31 Groove Pin, steel

(not shown) 1F118028992

32 Pusher Plate, steel

Sizes 3A & 4A 1H382199052

Sizes 3B & 4B 1F117999012

33 Cap Screw, cd pl steel (6 req’d)

(not shown)

Sizes 3B & 4B only 1A560632982

34 Travel Stop, steel (not shown)

Sizes 3B & 4B, Type 655 only 1J833124092

Sizes 32 thru 46

51 Handwheel,cast iron 1F143819042

54 Hex Nut, cd pl steel 1A353724122

133 Handwheel Stem, bronze 27A9646X012

134 Washer, cd pl steel 1A518925072

135 Pusher, steel 1F117999012

137 Hex Nut, cd pl steel 18A2300X012

138* O-Ring, nitrile 1D237506992

139* O-Ring, nitrile 1D267306992

140 Groove Pin, steel 1F118028992

141 Cap Screw, steel 1A368424052

142 Handwheel Body, cast iron

1/4 in. supply connection 37A9437X012

1/2 in. supply connection 37A9438X012

241 Lubriplate Mag-1, 14 oz. (0.396 kg) can

(not furnished with actuator) 1M1100X0012

*Recommended spare parts

Type 655 and 655R

Figure5. T

ype 655 Actuator

30A8341-A/DOC

30A8342-A/DOC SIZE 3A AND 4A ACTUATOR DIAPHRAGM CASINGS

A APPLY MOLYKOTE NO. 77 LUBRICANT TO ADJUSTING SCREW

Figure

6. Size 3A and 4A T

op-Mounted

Handwheel Assembly

28A1216-C/DOC

Figure 7. Size 3B and 4B T

op-Mounted

Handwheel Assembly

38A1217-B/DOC

APPLY LUB

PART NOT SHOWN : 31 APPLY LUB

PARTS NOT SHOWN : 30 & 31

Type 655 and 655R

Figure

8. Size 32 through 46 T

op-Mounted Handwheel Assembly

BV8008-E/DOC

Key 6 Spring, steel

SPRING

COLOR CODE

SPRING RATE SAFE LOAD

SPRING

PART NUMBER COLOR CODE Lb/in. N/mm Lb N

1F713027112

Aluminum

red 123 22 290 1290

1F714427112 Aluminum & dark green 246 43 545 2420

1F176727032 Dark green 368 64 843 3750

1F176827092 Aluminum 490 86 1060 4720

1F176927092 Dark blue 612 107 1187 5200

1F714327092 Aluminum & dark blue 830 145 1630 7250

1E795327082

Light blue

1260 220 1840 8184

1E792427082 Light green 1470 257 2200 9790

1E795427082 Light grey 1770 310 2600 11,600

1E793327082 Yellow 2100 368 3045 13,500

1E792327092 Dark grey 735 129 1160 5160

1J258127092

Aluminum & brown

1000 175 1575 7000

1E795627082 White 2520 441 3150 14,010

Type 655 and 655R

For information, contact Fisher Controls:

Marshalltown, Iowa 50158 USA

Cernay 68700 France

Sao Paulo 05424 Brazil

Singapore 128461

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Printed in U.S.A.