Actuator_655R IOM

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Types 655 and 655R Actuators

for Self-Operated ControlContentsIntroduction 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Scope of Manual 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .Description 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Specifications 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Actuator Mounting 3. . . . . . . . . . . . . . . . . . . . . . . . . . .Loading Connections 6. . . . . . . . . . . . . . . . . . . . . . . . .

Startup 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Startup for Pressure-Reducing Service 6. . . . . . . . . .

Startup for Pressure-Relief Service 6. . . . . . . . . . . . .Adjustment for Pressure-Reducing or

Pressure-Relief Service 6. . . . . . . . . . . . . . . . . . . .

Shutdown 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maintenance 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Actuator 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Disassembly 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Assembly 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Top-Mounted Handwheel 8. . . . . . . . . . . . . . . . . . . . .Disassembly 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Assembly 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts Ordering 9. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts List 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Introduction

Scope of Manual

This instruction manual provides installation, adjust-ment, maintenance, and parts ordering for the Type655 and 655R actuators and the top-mounted hand-wheel. Refer to separate instruction manuals for in-formation about valves and accessories used withthese actuators.

Only personnel qualified through training or experienceshould install, operate, and maintain the Type 655 and655R actuators. If you have any questions about theseinstructions, contact your Fisher Controls sales officeor sales representative before proceeding.

Figure 1. T ype 655-ED Pressure-Reducing V alve

Figure 2. Type 655 Actuator Nameplate

1F9408-E / DOC

W0466-1 / IL

Instruction ManualForm 1292October 1997 Type 655 and 655R



Type 655 and 655R

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Table 1. Specifications

Actuator Sizes and Maximum Casing Pressures

ACTUATOR MAXIMUM CASING PRESSURE

SIZE Psig Bar

3A, 4A 250 17.23B, 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) yokeboss with 3/8 inch (9.5 mm) stem connectionSizes 4A through 46: 2-13/16 inch (71 mm) yokeboss 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 (3mm) 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 salesrepresentative

Casing Pressure Connections

1/2 inch NPT female

Approximate Weights

ACTUATOR APPROXIMATE WEIGHT

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 inconjunction with various valves to provide control for awide variety of pressure regulation applications. Type655 actuators are used for pressure-reducing servicewhen mounted on push-down-to-close valves such asthe Design ED, EK, and ET valves. Type 655R actua-tors are used for pressure-relief service when mountedon push-down-to-open valves such as the DesignEDR, EKR, and ETR valves. Both types are self-oper-ated and direct-acting; that is, increasing pressure inthe diaphragm casing forces the actuator stem down-ward, and decreasing the pressure allows the actuatorspring to lift the actuator stem upward.

Specifications

Specifications for the Type 655 and 655R actuatorsare shown in table 1. Information for a specific actua-tor is also found on the nameplate (figure 2) of thatactuator.

Installation

WARNING

To avoid personal injury or propertydamage caused by bursting of pressure-retaining parts, be certain the serviceconditions do not exceed the casingpressure limits listed in table 1. Usepressure-limiting or pressure-relievingdevices to prevent service conditionsfrom exceeding these limits.

Type 655 and 655R actuators are normally shippedmounted on a valve. Refer to the appropriate valveinstruction manual when installing the valve in thepipeline. If the actuator is shipped separately or if it isnecessary to mount the actuator on the valve, performthe 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 ofpipe scale or other debris that could possibly disruptservice. It is recommended that a strainer be installed



Type 655 and 655R

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in the pipeline ahead of the regulator or relief valve toprotect it while in service. And a conventional three-valve bypass (see figure 3) should be placed aroundthe 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 belowthe pipeline. If the regulator or relief valve is to beused for steam service, the valve should be installedwith the actuator positioned below the pipeline, andthe 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 theactuator on either a push-down-to-close or a push-down-to-open valve so that the actuator stem andvalve stem thread engagement will allow full travel andproper shutoff. Refer to figure 4 for actuator mountingcomponents. Key numbers refer to figure 5 unlessotherwise stated.

1. Turn the adjusting screw (key 10) into the yoke(key 7) to force the diaphragm (key 2) and diaphragmplate (key 4) against the upper diaphragm casing (key1).

2. Perform the following steps as appropriate for ei-ther push-down-to-close or push-down-to-open valveaction.

CAUTION

In the following procedures, do not ro-tate the valve plug while it is seatedsince this may cause damage to theseating surfaces and thereby allow ex-cessive leakage. Also, during travel ad-justment, use tools carefully to avoiddamaging the valve plug stem. A dam-aged stem could cut the packing andallow 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 lengthof 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 thenadd the valve plug travel to this measurement.

c. Raise the actuator so the valve plug can belifted off the seat ring.

Note

Either turn the actuator, or tighten thehex nuts together, and use a wrench onthe hex nuts to turn the valve plug andstem 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 stemmovement to check travel. If the movement is morethan full travel, turn the valve stem out of the actua-tor stem the amount of over-travel. If movement isless than full travel, turn the valve stem into theactuator 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 whenthe valve plug is seated.

b. Connect the pressure control lines as describedin the Loading Connection portion of this section.

c. Move the valve plug, by hand, from the seatedto the open position, and make sure that valvestem 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 instep c above, lower the actuator until the actuatorstem contacts the valve stem, and measure thedistance from the bottom of the actuator yoke tothe mating shoulder on the bonnet.

f. Thread the valve stem into the actuator stemuntil the thread engagement is equal to the dis-tance measured in the previous step. Tighten thehex nuts (key 12) together, and use a wrench toturn the valve plug and stem assembly.



Type 655 and 655R

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Table 2. Actuator Pressure-Setting Ranges (1)

ACTUATOR SPRING PART

PRESSUREREDUCTION

PRESSURERELIEF ACTUATOR SPRING PART

PRESSUREREDUCTION

PRESSURERELIEF

SIZE

NUMBER Minimum Maximum Minimum Maximum SIZE

NUMBER Minimum Maximum Minimum Maximum

Psig Bar Psig Bar Psig Bar Psig Bar 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 8.244

1E7954 27082 11 0.8 23 1.6 9.0 0.6 19 1.3

3A, 4A 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 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 3.934, 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 0.63B

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 6.135

1E7954 27082 7.0 0.5 15 1.0 5.5 0.4 11 0.84B

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 4.445

1E7954 27082 7.0 0.5 15 1.0 5.5 0.4 13 0.9

3B, 4B 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 1F1769 27092 2.4 0.2 7.2 0.5 2.8 0.2 6.3 0.432

1E7954 27082 26 1.8 55 3.8 22 1.5 38 2.635, 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 0.342

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

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 0.833

1E7954 27082 16 1.1 34 2.3 13 0.9 24 1.746

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 0.543

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 0.134

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.

Figure 3. Typical Installation Schematics

13A6502-A13A6503-AA1628-1 / IL PRESSUREĆREDUCING INSTALLATION PRESSUREĆRELIEF INSTALLATION



Type 655 and 655R

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Table 3. Effective Diaphragm Area (1)

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

SIZEIn.2 Cm2 In.2 Cm2 In.2 Cm2 In.2 Cm2 In.2 Cm2 In.2 Cm2 In.2 Cm2 In.2 Cm2 In.2 Cm2 In.2 Cm2

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.

Figure 4. Actuator/V alve Components

DV3742-BDH4667-B31A0223-BB0816-1 / IL

PUSHĆDOWNĆTOĆCLOSE VALVEPUSHĆDOWNĆTOĆOPEN VALVE



Type 655 and 655R

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g. Lower the actuator onto the valve body bonnet,and tighten the yoke locknut.

h. Stroke the actuator, and measure the stemmovement to check travel. If the movement is morethan full travel, turn the valve stem into the actuatorstem the amount of over-travel. If the movement is

less than full travel, turn the valve stem out of theactuator stem the amount of under-travel.

3. After correct travel has been obtained, tighten thehex nuts (key 12) against the actuator stem (key 8),and tighten the yoke locknut with a hammer andpunch.

Note

Changing the spring adjustment will notchange the actuator pressure range forthat particular spring (see table 2).Changing the spring adjustment merelyshifts the position of the spring eitherup or down so that valve travel cancoincide with the actuator pressure set-ting range.

4. While monitoring loading pressure with a pressuregauge, stroke the actuator, and then turn the adjustingscrew until the valve begins to travel at the desiredpressure. Turn the adjusting screw out of the yoke todecrease spring compression and thus allow the valveto begin travel at a lower loading pressure. Turn theadjusting screw into the yoke to increase spring com-pression and thus allow the valve to begin travel at ahigher 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 upstreampipeline for pressure-relief service or into the down-stream pipeline for pressure-reducing service asshown in figure 3. Make the pipeline tap at least fourto 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 the1/2-inch NPT connection in the center of the upperdiaphragm casing (key 1) or to the connection in thehandwheel 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 todampen any cycling or pulsating action of the regula-tor. Never completely close the needle valve while theregulator is in operation.

Startup

The procedures for placing into operation and adjust-ing the equipment for both pressure-reducing andpressure-relief applications are described below. Typi-cal installation schematics are shown in figure 3.

Startup For Pressure-Reducing Service1. 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 Service1. 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 orPressure-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 changethe nameplate to indicate the new pressure setting.The new pressure setting must not exceed the limitsgiven in tables 1 and 2 or in any applicable codes.

CAUTION

To protect equipment in the processsystem from a sudden release of pres-sure, always use a pressure gauge tomonitor 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. Todecrease the pressure setting, turn the adjustingscrew (key 10, figure 5) clockwise; to increase thepressure setting, turn the adjusting screw counter-clockwise. If the spring does not provide the requiredpressure setting, replace it through the following steps:

1. Disassemble the actuator by following steps 1, 3and 4 of the Disassembly portion of the Maintenance section.

2. Remove the diaphragm (key 2). Then, unscrew thecap screw (key 3), and lift the diaphragm plate (key 4)out of the actuator body.



Type 655 and 655R

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3. Replace the spring and reassemble the actuator byfollowing steps 5 and 6 of the Assembly portion of theMaintenance section.

ShutdownFor both pressure-reducing and pressure-relief ap-plications, refer to figure 3, and follow the proceduresdescribed below.

1. Close the upstream shutoff valve slightly.

2. Slowly open the bypass valve while monitoringdownstream 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 beinspected 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 startingdisassembly:

D Isolate the regulator or relief valvefrom the system pressure, and relieve allinternal pressure

D Release spring compression as de-scribed in step 2 of the Disassemblysection

The maintenance instructions are divided into two sec-tions: Actuator and Top-Mounted Handwheel .

Actuator

This procedure describes how the actuator can becompletely disassembled and assembled. When in-spection or repairs are required, disassemble onlythose 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 rotatethe valve plug while it is seated since

this may cause damage to the seatingsurfaces and thereby allow excessiveleakage. Also, during travel adjustment,use tools carefully to avoid damagingthe valve plug stem. A damaged stemcould 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 thespring (key 6).

2. For complete disassembly, the actuator must beremoved from the valve, and the actuator stem (key 8)must be completely disengaged from the valve plug

stem by rotating the actuator. Perform the appropriateprocedure 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 intothe 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 isnot forced against the seat, rotate the entire actua-tor until the actuator stem disengages completelyfrom 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, movethe valve plug, by hand, off the seat.

b. Loosen the hex nuts (key 12), and unscrew thevalve plug stem out of the actuator stem as far as itwill go.

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

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e. Rotate the entire actuator until the actuatorstem disengages from the valve plug stem.

3. Turn the adjusting screw (key 10) counterclockwiseout 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 4Aactuators or the cap screws and hex nuts (keys 19and 20) for all other sizes.

5. Remove the diaphragm (key 2); then, lift the dia-phragm plate (key 4) and actuator stem assembly outof the actuator body. Also, remove the spring and thelower spring seat (key 9).

6. For size 3A and 4A actuators, remove the lowerdiaphragm casing (key 5).

7. Remove the cap screw (key 3), and separate thediaphragm plate from the actuator stem.

8. For size 3B through 46 actuators, unscrew the capscrews (key 21), and remove the lower diaphragmcasing (key 5). Some Type 655R actuators will havetravel stops (key 13, not shown) in place of three ofthese six cap screws.

9. If a top-mounted handwheel assembly is used, re-fer to steps 4 through 8 of the Disassembly portion ofthe Top-Mounted Handwheel section.

Assembly

This procedure assumes that the actuator is complete-ly disassembled. If it is not, start the instructions at theappropriate step.

1. Before starting assembly, apply Molykote No. 77 orequivalent lubricant to the threads and the bearing endof the adjusting screw (key 10) as indicated in figure 5by 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 lowerdiaphragm casing (key 5), and secure it with the capscrews (key 21). Some Type 655R actuators will havetravel stops (key 13, not shown) in place of three ofthese 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 theadjusting screw into the yoke (key 7) toraise the diaphragm plate (key 4). Thiswill also ensure that the diaphragm will

have enough slack inside the casings forefficient travel.

5. Secure the diaphragm plate (key 4) to the actuatorstem (key 8) with the cap screw (key 3), and installthis assembly into the actuator. Install the diaphragm,making sure that the patterned side of the diaphragmis next to the diaphragm plate.

Note

When replacing the upper diaphragmcasing (key 1), be sure there are nowrinkles in the diaphragm that mightcause the diaphragm to tear or allowleakage.

6. Place the upper diaphragm casing onto the lowerdiaphragm casing. For size 3A and 4A actuators, se-cure the casings with the cap screws (key 19). For allother actuator sizes, secure the casing with the capscrews 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 theprocedures outlined in the Actuator Mounting portionof the installation section.

8. Connect the pressure control line by following theprocedures 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 HandwheelTop-mounted handwheel assemblies (figures 6, 7 and8) are usually used as adjustable travel stops to limitfull upward travel of the actuator stem. Turning thehandwheel clockwise forces the actuator stem down-ward, while turning the handwheel counterclockwiseallows the spring to force the actuator stem upward. Ifthe actuator is used with a push-down-to-close valve,full opening of the valve plug can be restricted throughthe 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 restrictedby 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 disassemblyand 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 32through 46 top-mounted handwheel assemblies.



Type 655 and 655R

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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; key137, 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 capscrews (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 capscrews and hex nuts (keys 19 and 20, figure 5), andthen lift off the upper diaphragm casing (key 1, figure5) and handwheel assembly. To replace the O-ring(key 139, figure 8) or for ease of handling, separatethe handwheel assembly from the upper diaphragmcasing. This can be accomplished by removing thecap 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; key137, figure 8) from the handwheel stem (key 26, fig-ures 6 and 7; key 133, figure 8), and then remove thehandwheel stem through the bottom of the handwheelbody (key 28, figures 6 and 7; key 142, figure 8). Ascrewdriver slot in the top of the handwheel stem isprovided 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 thepusher plate (key 32, figures 6 and 7; key 135, figure8) off the handwheel stem. For Type 655, size 3B and4B actuators, a travel stop (key 34, figure 7) shouldalso be removed with these parts.

Assembly

This procedure assumes that the handwheel assemblyis completely disassembled. If it is not, start theinstructions 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 infigures 6, 7 and 8.

2. Slide the pusher plate (key 32, figures 6 and 7; key135, figure 8) onto the handwheel stem, and, if neces-sary, insert the groove pin (key 31, not shown; key140, 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; key51, figure 8) and washer (key 24, figures 6 and 7; key134, figure 8) onto the handwheel stem, and secure itwith the hex nut (key 22, figures 6 and 7; key 54, fig-ure 8).

5. For size 3A and 4A actuators, set the handwheelbody onto the actuator, and secure it with the capscrews (key 19, figure 5). Tighten the cap screws tono more than 20 foot-pounds (27 newton-meters) oftorque using an even, crisscross pattern.

6. For size 3B through 46 actuators, set the upperdiaphragm casing (key 1, figure 5) and handwheel as-sembly onto the actuator body, and secure it with thecap 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 ofthe 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 salesoffice or sales representative about this equipment,

refer to the serial number found on the actuator name-plate (key 17, figure 5). Also, specify the complete11-character part number from the following parts listwhen ordering replacement parts.



Type 655 and 655R

10

Parts List

Actuator

Key Description Part Number

1 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



Sizes 33 & 43

W/o top-mounted handwheel 2F747828992W/top-mounted handwheel 2E801125062

Sizes 34 & 44


W/top-mounted handwheel 2E682625062

Sizes 35 & 45



Sizes 36 & 46



2* Diaphragm, neoprene

Sizes 3A & 4A 1F725102192

Sizes 3B & 4B 1F725902192

Sizes 32 & 42


W/ top-mounted handwheel 1F702202192Sizes 33 & 43


W/ top-mounted handwheel 1F7023X0012

Sizes 34 & 44



Sizes 35 & 45



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 ironSizes 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


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

5 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 3F6999250626 Spring See following table

7 YokeSizes 3A thru 36Cast iron 2E869619042Steel 2H786522012

Sizes 4A thru 46Cast iron 3E807019042Steel 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 only7/16 in. (11 mm) travel 1F7092240925/8 in. (16 mm) travel 1F7091240923/4 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 1E7934389925/8 in. (16 mm) travel 1E7935389923/4 in. (19 mm) travel 1E793638992

Sizes 4A thru 467/16 in. (11 mm) travel 1E8076389925/8 in. (16 mm) travel 1E8077389823/4 in. (19 mm) travel 1E808138992

*Recommended spare parts



Type 655 and 655R

11


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


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


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 1F14381904254 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



140 Groove Pin, steel 1F118028992

141 Cap Screw, steel 1A368424052

142 Handwheel Body, cast iron



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

(not furnished with actuator) 1M1100X0012

*Recommended spare parts



Type 655 and 655R

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Figure 5. 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

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Figure 8. Size 32 through 46 Top-Mounted Handwheel Assembly .

BV8008-E/DOC

Key 6 Spring, steel

SPRING SPRING RATE SAFE LOAD

PART NUMBERCOLOR 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 13,5001E792327092 Dark grey 735 129 1160 5160

1J258127092 Aluminum & brown 1000 175 1575 7000

1E795627082 White 2520 441 3150 14,010



Type 655 and 655R

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For information, contact Fisher Controls: Marshalltown, Iowa 50158 USACernay 68700 FranceSao Paulo 05424 BrazilSingapore 128461

Thecontentsofthispublicationarepresentedforinformationalpurposesonly,andwhileeveryefforthasbeenmade t oensur et heira ccurac y ,t heyar enott obeconstrueda swarr antie so rguara ntees ,e xpres so ri mplie d,

regard ing th e produ cts or s ervic es desc ribed h erein o r thei r use or a pplic abili ty. We rese rve th e righ t to mod ify or improv e the de signs o r speci ficat ions o f such p roduct s at any time w ithou t noti ce.

EFisher Controls International, Inc. 1975, 1997; All Rights Reserved

Fisher, Fisher-Rosemount, and Managing The Process Better are marks owned by Fisher Controls International, Inc. or Fisher-Rosemount Systems, Inc.All other marks are the property of their respective owners.

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