Fisher 657 User Manual

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Instruction Manual

Form 1909

August 2006

657 Size 80 and 100 Actuators

Type 657 Diaphragm Actuators

Size 80 and 100

Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . 2

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Actuator Mounting . . . . . . . . . . . . . . . . . . . . . . . . 3

Loading Connection . . . . . . . . . . . . . . . . . . . . . 3

Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Travel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Spring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Size 80 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Size 100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Actuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Size 80 Disassembly . . . . . . . . . . . . . . . . . . . . . 6

Size 80 Assembly . . . . . . . . . . . . . . . . . . . . . . . 7

Size 100 Disassembly . . . . . . . . . . . . . . . . . . . . 8

Size 100 Assembly . . . . . . . . . . . . . . . . . . . . . . 9

Size 80 Side-Mounted Handwheel . . . . . . . . . 10

Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Size 80 Hydraulic Snubber . . . . . . . . . . . . . . . . 11

Size 80 Top-Mounted Handwheel

(Adjustable Up Travel Stop) . . . . . . . . . . . . 11

Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Size 100 Top-Mounted Handwheel

(Adjustable Up Travel Stop) . . . . . . . . . . . . 12

Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Parts Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Note

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

W0366-1 / IL

Figure 1. Sectional view of Type 657 Size 100 Actuator

AIR PUSHES

STEM DOWN

SPRING

LIFTS

AF3833-A

A0792-2/IL

Figure 2. Schematic Representation of Type 657 Actuator

D100307X012

www.Fisher.com

657 Size 80 and 100 Actuators

Instruction Manual

Form 1909

August 2006

Table 1. Specifications

SPECIFICATIONS

 

 

 

ACTUATOR SIZE

 

 

 

 

 

 

 

 

 

 

80

 

 

 

100

 

 

 

 

 

 

 

 

 

 

 

 

 

Nominal Effective Diaphragm Area

cm2

1761

 

 

 

2902

inch2

273

 

 

 

450

 

 

 

 

Yoke Boss Diameters

mm

127

 

 

127

 

178

 

 

 

 

 

 

 

inch

5

 

 

5H(1)

 

7

 

 

 

 

Acceptable Valve Stem Diameters

mm

25.4 or 31.8

 

31.8

 

50.8

 

 

 

 

 

 

 

inch

1 or 1-1/4

 

1-1/4

 

2

 

 

 

 

 

 

 

 

 

 

 

Maximum Allowable Output Thrust

N

62,942

 

 

200,170

 

 

 

 

 

 

 

lb

14,150(2)

 

 

45,000

 

 

 

Maximum Travel

mm

76

 

 

 

102

 

 

 

 

 

 

 

inch

3

 

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

Maximum Casing Pressure for Actuator

 

Cast Iron

 

Steel

 

 

 

 

 

 

 

 

 

 

bar

3.4

 

4.9

 

6.9

Sizing(3)

 

 

 

 

 

 

 

 

 

psig

50

 

70

 

100

 

 

 

 

 

 

 

 

 

 

 

 

 

Cast Iron

 

Steel

 

 

 

Maximum Diaphragm Casing Pressure(3)(4)

 

 

 

 

 

 

bar

4.1

 

5.5

 

7.9

 

psig

60

 

80

 

115

 

 

 

 

 

 

 

 

Material Temperature Capabilities

_C

 

 

−40 to 82

 

 

 

 

 

 

 

 

 

_F

 

 

−40 to 180

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pressure Connections

 

 

 

1/4 inch NPT female

 

 

 

 

 

 

 

 

 

Approximate Weights Without Handwheel

kg

234

 

 

 

346

 

 

 

 

 

 

 

lb

515

 

 

 

762

 

 

 

 

 

 

 

 

 

 

 

 

1. Heavy actuator-to-bonnet bolting.

2. 88,075 N (19,800 lb) for steel construction.

3. 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 valve stem force. (If you have any questions on allowable valve stem force, contact your Emerson Process Management sales office.)

4. 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 installation, adjustment, maintenance, and parts ordering for the Type 657 actuator in sizes 80 and 100. Refer to separate instruction manuals for information about other equipment and accessories used with these actuators.

No person may install, operate, or maintain Type 657 actuators without first D being fully trained and qualified in valve, actuator, and accessory installation, operation, and maintenance, and D carefully reading and understanding the contents of this manual. If you have any questions about these instructions, contact your Emerson Process Management sales office before proceeding.

Description

The Type 657 actuator (figure 1) is a direct-acting, spring-opposed diaphragm actuator used for automatic operation of control valves. The actuator positions the valve plug in response to varying pneumatic loading pressure on the diaphragm. Figure 2 shows the operation of these actuators.

A Type 657 actuator can be furnished with either a top-mounted or side-mounted (size 80 only) handwheel assembly. A top-mounted handwheel assembly is normally used as an adjustable-up travel stop. The size 100 top-mounted handwheel may be used as an auxiliary manual actuator. A side-mounted handwheel assembly is normally used as an auxiliary manual actuator.

Specifications

Refer to table 1 for specifications of the Type 657 actuator. See the actuator nameplate for information about a specific actuator.

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Instruction Manual

Form 1909

August 2006

657 Size 80 and 100 Actuators

Installation

WARNING

To avoid personal injury or parts damage, do not exceed the Maximum Diaphragm Casing Pressure listed in table 1. The Maximum Diaphragm Casing Pressure must not produce a force on the actuator stem greater than the maximum allowable actuator output thrust or the maximum allowable stem load.

Always wear protective gloves, clothing, and eyewear when performing any installation operations to avoid personal injury.

Check with your process or safety engineer for any additional measures that must be taken to protect against process media.

If installing into an existing application, also refer to the WARNING at the beginning of the Maintenance section in this instruction manual.

When an actuator and valve body are shipped together, the actuator is normally mounted on the valve. Follow the valve body instructions when installing the control valve in the pipeline. If the actuator is shipped separately or if it is necessary to mount the actuator on the valve, perform the Actuator Mounting procedures as described below.

For information on mounting valve positioners, refer to the appropriate valve positioner instruction manual.

actuator stem is fully extended. Reduce actuator loading pressure to retract the stem approximately 3.2 mm (1/8-inch).

5. For push-down-to-open valves, move valve plug to closed position. On large body sizes, this may require the use of a pry bar inserted through the body line opening. If the body is installed in a pipeline, the bottom flange (if one is used) can be removed and the valve plug pushed to the seat from the bottom opening. Pressure the actuator to move the stem out 3.2 mm (1/8-inch).

WARNING

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

CAUTION

Incomplete engagement of both valve stem and actuator stem in the stem connector can result in stripped threads or improper operation. Be sure that the length of each stem clamped in the stem connector is equal to or greater than the diameter of that stem.

6.Clamp the actuator and valve plug stems between the two stem connector halves (key 26, figure 4). Insert and tighten the stem connector cap screws.

7.Thread the stem locknuts against the stem connector.

8.Align the travel indicator scale (key 18, figures 4 and 5) to show valve position.

Actuator Mounting

1.To permit adjustment of the actuator spring, the size 100 actuator must be installed in a vertical position above the valve body. Mount the actuator on the valve bonnet. Insert the cap screws, and tighten the hex nuts, securing the actuator to the bonnet.

2.Screw valve stem locknuts (key 16, figure 4) all the way onto valve stem thread.

3.Connect an air supply to the diaphragm casing.

4.For push-down-to-close valves, be sure the valve plug is on its seat. Apply pressure to ensure that the

Loading Connection

1.Connect the loading pressure piping to the connection in the top of the diaphragm casing.

2.Remove the 1/4-inch bushing (key 33, figure 4 and key 120, figure 5) to increase connection size, if necessary. The connection can be made with either piping or tubing.

3.Keep the length of tubing or piping as short as possible to avoid transmission lag in the control signal. If an accessory (such as a volume booster or valve positioner) is used, be sure that the accessory

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657 Size 80 and 100 Actuators

Instruction Manual

Form 1909

August 2006

is properly connected to the actuator. Refer to the positioner instruction manual as necessary.

4.Cycle the actuator several times to check that the valve stem travel is correct and that the travel occurs when the correct pressure range is applied to the diaphragm.

5.If valve stem travel is incorrect, refer to the Travel procedure in the Adjustments section.

6.If the pressure range is incorrect, refer to the Spring procedure in the Adjustments section.

Adjustments

Travel

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

When adjusting travel of a reverse-acting (push-down-to-open) valve, apply a slight pressure on the actuator diaphragm. This moves the valve plug off the seat, reducing the chance of damaging the valve plug or seat during adjustments.

1. Back the stem locknuts away from the stem connector, and slightly loosen the stem connector cap screws.

CAUTION

Spring

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

Monitor loading pressure carefully when making adjustments. Do not exceed the pressure specifications of either the loading regulator or the actuator casings.

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

Size 80

Remove cover band (key 60, figure 4), insert a rod of approximately 12.7 mm (1/2-inch) diameter into a hole in the adjusting screw (key 12, figure 4), and rotate the adjusting screw with the rod. Rotating the screw from left to right will increase the loading pressure required to start actuator stem travel; opposite rotation will decrease the pressure required to start travel.

Size 100

CAUTION

Do not use wrenches or other tools directly on the valve stem. Damage to the stem surface and subsequent damage to the valve packing may result.

2.Tighten the locknuts together, using a wrench, then screw the valve stem either into the stem connector to lengthen travel or out of the stem connector to shorten travel.

3.Cycle the actuator to check the travel. If actual travel is not equal to the specified travel, adjust and check travel until correct. Tighten the stem connector cap screws when correct travel is obtained.

4.Raise the travel indicator disk by threading the stem locknuts against the stem connector.

The actuator must be in the vertical position when adjusting spring to avoid damage to thrust bearing (key 35, figure 5) and to properly position spacers required for adjustment.

Remove the shroud plate (key 107, figure 5), and loosen the jam nut (key 115, figure 5).

For small spring forces, adjustments can be made by rotating the adjusting nut (key 114, figure 5). Clockwise rotation (when viewed from diaphragm casings) of the adjusting nut will increase the loading pressure required to start actuator stem travel, and counterclockwise rotation will decrease the pressure required to start travel. Tighten the jam nut when adjustment is complete.

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Instruction Manual

Form 1909

August 2006

657 Size 80 and 100 Actuators

B

JAM NUT

ADJUSTING NUT

SPRING SEAT

LOWER

DIAPHRAGM

CASING

A0950-1 / IL

Figure 3. Dimension B for Spring Adjustment

For high spring forces, it is necessary to use spacers between the lower diaphragm casing and the spring seat to isolate spring force from the adjusting nut.

WARNING

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

To avoid personal injury, keep hands and tools away from the spring and spring seat as instructed in the following procedure.

1.It is recommended that three spacers be made of 3-inch schedule 80 pipe cut to the appropriate length specified in step 2. If other than the recommended material is to be used, be certain that the spacers are capable of withstanding the spring force involved. The spacers must be of equal length with ends cut squarely.

2.Measure dimension B as shown in figure 3. Cut length of spacers as follows:

a.If it is desired to decrease spring compression, make the spacers approximately 4.8 mm (3/16-inch) longer than dimension B.

b. If it is desired to increase spring compression, make the spacers approximately 4.8 mm (3/16-inch) shorter than either dimension B plus the amount of adjustment required or dimension B plus valve travel, whichever is less.

3.Whenever the total amount of adjustment required is greater than valve travel, the adjustment must be made in two or more steps, and the amount of adjustment taken in each step must be less than valve travel.

4.Pressure the actuator to attain full travel. Cautiously insert the spacers at equal intervals around the spring seat (key 11, figure 5). The spacers must be seated squarely when in use or they may slip out of position. Keeping hands and tools away from the spring and spring seat, slowly decrease loading pressure until the spring force holds the spacers firmly between the spring seat and lower diaphragm casing (key 5, figure 5).

5.Loosen the jam nut. The adjusting nut can now be rotated clockwise (when viewed from the diaphragm casings) to increase the loading pressure required to start actuator stem travel or counterclockwise to decrease the pressure required to start travel.

6.Pressure the actuator to move the spring seat away from the spacers, and carefully remove the spacers.

7.If the total adjustment required was greater than valve travel, repeat the procedure. It will be necessary to make new spacers using the new dimension B and the remaining adjustment required or valve travel, whichever is less. Tighten the jam nut when adjustment is complete.

Maintenance

WARNING

Avoid personal injury or property damage from sudden release of process pressure or bursting of parts. Before performing any maintenance operations:

DAlways wear protective gloves, clothing, and eyewear when performing any maintenance operations to avoid personal injury.

DDisconnect any operating lines providing air pressure, electric power, or a control signal to the actuator. Be

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657 Size 80 and 100 Actuators

Instruction Manual

Form 1909

August 2006

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 precompression.

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.

DCheck with your process or safety engineer for any additional measures that must be taken to protect against process media.

The maintenance instructions are divided into four sections: actuator (sizes 80 and 100); side-mounted handwheel assembly (manual operator); hydraulic snubber; and top-mounted handwheel assembly (adjustable-up travel stop).

Actuator

Size 80 Disassembly

1. Bypass the control valve. Reduce the loading pressure to atmospheric, and remove the tubing or piping from the top of the diaphragm casing (key 1).

WARNING

To avoid personal injury from the precompressed spring force thrusting the upper diaphragm casing (key 1) away from the actuator, relieve spring compression (step 2, below), and carefully remove casing cap screws (key 22) (step 4, below).

2.Remove cover band (key 60). Insert a rod of approximately 12.7 mm (1/2-inch) diameter into a hole in the adjusting screw (key 12), and rotate the adjusting screw from right to left until spring compression is relieved. If the actuator has a handwheel, rotate it counterclockwise, relieving all spring compression.

3.If necessary, the entire actuator may be removed from the valve body by unscrewing two cap screws from stem connector (key 26) and removing actuator-to-bonnet bolting.

4.Unscrew diaphragm casing cap screws and nuts (keys 22 and 23), and lift off upper diaphragm casing (key 1).

5.Remove the molded diaphragm (key 2).

6.For actuators without snubber, remove diaphragm plate and stem (keys 4 and 10) as an assembly. This assembly can be broken down further, if necessary, by removing the cap screw (key 3).

7.For actuators with snubber (see figure 7), unscrew cap screw (key 3), and remove diaphragm plate (key 4). Remove stem connector (key 26). Unscrew cap screws (key 85), and remove cylinder assembly (key 74) and attached stem and upper seat (keys 10 and 90) from actuator.

To disassemble snubber:

This procedure describes how the actuator can be completely disassembled and assembled. When inspection 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 4 for size 80 actuators and figure 5 for size 100 actuators.

a.Unscrew stem from piston/piston rod assembly (key 27).

b.Remove retaining rings, cylinder heads, and piston/piston rod assembly (keys 76, 75, and 27). Replace packing and O-rings (keys 103, 104, 77 and 105) as required.

8.Remove actuator spring, upper sleeve, and spring seat (keys 6, 34 and 11).

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Instruction Manual

Form 1909

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657 Size 80 and 100 Actuators

9.Unscrew cap screws and nuts (keys 62 and 63), and remove spring case (key 29). Cap screws (key 62) on units with side-mounted handwheel do not use hex nuts (key 63).

10.For actuators without side-mounted handwheel, remove adjusting flange (key 36) and attached thrust bearing and adjusting screw (keys 35 and 12).

11.For actuators with side-mounted handwheel (see figure 7), unscrew cap screws (key 64), and remove adjusting flange (key 36) and attached thrust bearing and adjusting screw (keys 35 and 12). Do not lose the key (key 47).

Size 80 Assembly

1. Coat the threads of the adjusting flange (key 36) with anti-seize lubricant (key 244). Replace the adjusting flange, adjusting screw, and thrust bearing (keys 36, 12, and 35). Pack bearing with lithium grease lubricant (key 241).

For actuators with side-mounted handwheel, install the key (key 47) on the adjusting flange (key 36). Coat the adjusting flange threads with anti-seize lubricant. Install the adjusting flange so that the key engages the slot in the lower sleeve. Secure adjusting flange with cap screws (key 64). Adjust set screws (key 40, figure 7) to eliminate free play in handwheel bearings.

Note

Over-tightening the set screws will make handwheel operation difficult.

2.Mount the spring case (key 29) to the yoke (key 9) using cap screws and hex nuts (keys 62 and 63).

3.Position the lower spring seat (key 11), and slide the actuator spring (key 6) squarely onto the spring seat.

4.If the diaphragm plate and actuator stem (keys 4 and 10) were separated, fasten them together using the cap screw (key 3) and tighten to a torque of 544 NSm (400 lbfSft).

For actuators without a hydraulic snubber, slide upper sleeve (key 34) onto the actuator stem, and then slide upper sleeve, actuator stem and diaphragm plate into the spring case (key 29) so that the spring (key 6) fits squarely between the diaphragm plate and the spring seat (key 11).

For actuators with a snubber, thread the actuator stem and upper spring seat (keys 10 and 90) into the piston/piston rod assembly (key 27). Install the snubber assembly and attached actuator stem into

the upper sleeve, spring case adaptor, and spring case (keys 34, 72, and 29). Secure with cap screws (key 85).

5.Place the diaphragm (key 2) with pattern side facing away from the diaphragm plate (key 4). Align the holes in the diaphragm and the lower diaphragm casing (key 5).

6.Position the upper diaphragm casing (key 1) on the diaphragm (key 2), and align the holes.

Note

When you replace actuator diaphragms in the field, take care to ensure the diaphragm 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 80 and 100 actuators.

CAUTION

Over-tightening the diaphragm casing cap screws and nuts can damage the diaphragm. Do not exceed the following maximum torque values for the appropriate diaphragm material:

EPDM/Meta-Aramid: 95 NSm (70 lbfSft)

Nitrile, Silicone, FKM (fluorocarbon)/Meta-Aramid: 68 NSm (50 lbfSft)

Note

Do not use lubricant on these bolts and nuts. Fasteners must be clean and dry.

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Instruction Manual

Form 1909

August 2006

Table 2. Maximum Torque Values

DIAPHRAGM MATERIAL

INITIAL TORQUE

FINAL TORQUE

NSm (lbfSft)

NSm (lbfSft)

 

EPDM/Meta-Aramid

41 (30)

82, +/−13 (60, +/−10)

 

 

 

Nitrile, Silicone, FKM/Meta-Aramid

34 (25)

68 (50)

 

 

 

7.Insert the cap screws (key 22) into the diaphragm casing, and tighten the hex nuts (key 23) in the following manner. The first four hex nuts tightened should be diametrically opposed and 90 degrees apart. Tighten these four hex nuts to the initial torque value found in table 2 for the diaphragm material being used.

8.Tighten the remaining hex nuts in a clockwise, criss-cross pattern to the initial torque value found in table 2 for the diaphragm material being used.

9.Repeat this procedure by tightening four hex nuts, diametrically opposed and 90 degrees apart, to the final torque value that is specified in table 2 for the diaphragm material being used.

10.Tighten the remaining hex nuts in a clockwise, criss-cross pattern to the final torque value that is specified in table 2 for the diaphragm material being used.

11.After the last hex nut is tightened complete another tightening sequence, this time in a circular pattern around the bolt circle to the final torque value that is specified in table 2 for the diaphragm material being used.

12.Once completed, no more tightening is recommended.

13.Mount the actuator on the valve in accordance with the procedures in the Installation section.

Size 100 Disassembly

Key numbers used in the following procedure are shown in figure 5 except when indicated.

Note

Two construction variations of the size 100 are based on spring length. Group 1 springs have a free length of 845 mm (33-1/4 inches), and group 2 springs have a free length of 419 mm (16-1/2 inches).

WARNING

To avoid personal injury from the precompressed spring force thrusting the upper diaphragm casing (key 1) away from the actuator, relieve spring compression (step 1, below), and carefully remove casing cap screws (key

22)(step 7, below).

1.Remove shroud plate (key 107), loosen jam nut (key 115), and rotate adjusting nut (key 114) until spring compression is relieved.

Note

To relieve spring compression when high spring forces exist, refer to the Adjusting Actuator Spring section, and follow the instructions given for size 100 actuators with high spring forces.

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

3.For actuators with top-mounted handwheel, rotate handwheel (key 51, figure 8) counterclockwise as far as it will go, unscrew cap screws (key 109, figure 5), and remove handwheel and gear case assembly (key 65, figure 8).

4.For actuators without top-mounted handwheel, unscrew cap screws (key 109), and remove diaphragm casing cover (key 123).

5.If necessary, remove the actuator from the valve body by separating the stem connector (key 26) and removing the actuator-to-bonnet bolting. Separate the stem connector by loosening the stem locknuts (key 16) and unscrewing the four cap screws.

6.Unscrew and remove actuator stem extension (key 116).

7.Unscrew cap screws (key 22), and remove upper diaphragm casing (key 1).

8.Remove backup plate, diaphragm retainer, diaphragm, diaphragm plate, and washer (keys 13, 110, 2, 4, and 117).

9.Unscrew the nuts that attach lower diaphragm casing (key 5) to actuator tie rods (key 21).

10.Remove lower diaphragm casing from tie rods and remove hex jam nut, adjusting nut thrust bearing

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Instruction Manual

Form 1909

August 2006

657 Size 80 and 100 Actuators

(used with group 1 springs only), and spring seat (keys 115, 114, 35, and 11).

11.Remove seal bushing (key 111) and diaphragm casing cover O-rings (keys 112 and 113) from upper diaphragm casing (key 123). Replace with new parts if necessary. Apply lithium grease lubricant to the O-rings.

12.Remove actuator spring (key 6).

Size 100 Assembly

Note

Units using a group 2 spring require one spring seat (key 11) on each end of the spring (key 6); units using a group 1 spring require only one spring seat on the diaphragm end of the spring as shown in figure 5.

1.Place the spring and spring seats (keys 6 and 11) inside the spring case.

2.For actuators using a group 1 spring, pack the thrust bearing (key 35) with lithium grease lubricant (key 241). Place bearing on the spring seat.

3.Screw the hex jam nut and adjusting nut (keys

115and 114) onto the actuator stem.

4.Install the lower diaphragm casing (key 5) on the actuator tie rods (key 21). Secure with hex nuts.

Note

Before installing diaphragm plate (key 4), rotate adjusting nut (key 114) until the top of the actuator stem is 264 mm (10-3/8 inches) above the inside surface of the lower casing (key 5).

When installing diaphragm (key 2), be certain that the rubber side of the diaphragm faces away from the spring.

CAUTION

To avoid product damage, smooth the edge of the diaphragm to avoid wrinkling, and be careful that the diaphragm fold does not get pinched when the upper casing (key 1) is installed.

5.Install washer, diaphragm plate, diaphragm, diaphragm retainer, and backup plate

(keys 117, 4, 2, 110 and 13).

6.Apply lithium grease lubricant (key 241) to the thread on the diaphragm end of the actuator stem (key 10).

7.Position the upper diaphragm casing (key 1) on the diaphragm (key 2), and align the holes.

Note

If backup plate (key 13) interferes with installation of upper casing, rotate adjusting nut (key 114) to move the plate.

Note

When you replace actuator diaphragms in the field, take care to ensure the diaphragm 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 80 and 100 actuators.

CAUTION

Over-tightening the diaphragm casing cap screws and nuts can damage the diaphragm. Do not exceed 68 NSm (50 lbfSft) torque.

Note

Do not use lubricant on these bolts and nuts. Fasteners must be clean and dry.

8.Insert the cap screws (key 22), and tighten the hex nuts (key 23) in the following manner. The first four hex nuts tightened should be diametrically opposed and 90 degrees apart. Tighten these four hex nuts to 34 NSm (25 lbfSft).

9.Tighten the remaining hex nuts in a clockwise, criss-cross pattern to 34 NSm (25 lbfSft).

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

11.Tighten the remaining hex nuts in a clockwise, criss-cross pattern to 68 NSm (50 lbfSft).

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Form 1909

August 2006

12.After the last hex nut is tightened to 68 NSm (50 lbfSft), all of the hex nuts should be tightened again to 68 NSm (50 lbfSft) in a circular pattern around the bolt circle.

13.Once completed, no more tightening is recommended.

14.Install the actuator stem extension (key 116), diaphragm casing cover O-rings (keys 112 and 113), and seal bushing (key 111). Install the gear case cover (key 123) or the handwheel assembly (see figure 8).

15.Mount the actuator on the valve, and secure with the actuator-to-bonnet bolting. Refer to the Installation section to connect actuator stem to valve plug stem.

Size 80 Side-Mounted Handwheel

The side-mounted handwheel assembly (figure 7) is normally used as a manual operator. The handwheel can be mounted in either of two positions so that, regardless of valve plug action, counterclockwise rotation always opens the valve. The assembly is a continuously connected type with an indicator to show neutral position. By rotating handwheel away from neutral, the handwheel can be used to limit travel in either direction but not both directions at the same time.

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

Instructions are given below for complete disassembly and assembly. Perform the disassembly only as far as necessary to accomplish the required maintenance; then, begin the assembly at the appropriate step.

Key numbers refer to figure 7.

Disassembly

1.Complete steps 1 through 9 of the disassembly portion of the size 80 actuator section.

2.Unscrew cap screws (key 64), and remove adjusting flange (key 36). Do not lose the key (key 47).

3.Unscrew the two screws (key 28), and remove travel stop indicator (key 58) from lower sleeve (key 46).

4.Turn handwheel (key 51) to raise lower sleeve. Continue turning handwheel until lower sleeve is free

of worm gear (key 44). Lift out lower sleeve, bearing and gear retainer, thrust bearings, and worm gear (keys 46, 66, 67, and 44).

5.The worm shaft (key 45) and associated parts can be removed in order to replace or lubricate them. First, remove the handwheel cap (key 54) and the handwheel (key 51). Do not lose the small ball or spring (keys 55 and 56).

6.Loosen the two set screws (key 41), and unscrew the two worm retainers (keys 48 and 49). The ball bearings (key 50) will come out with the retainers. Remove the worm shaft (key 45).

Assembly

1.Pack the ball bearings (key 50) with lithium grease lubricant, and insert one ball bearing in the back worm retainer (key 49) as shown in figure 7 (section C-C).

2.Thread the back worm retainer and ball bearing (keys 49 and 50) into the gear case. Align the slot in the worm retainer with the set screw hole in the gear case, insert the set screw (key 41), and tighten it.

3.Coat the worm shaft (key 45) threads with

anti-seize lubricant (key 244), and slide the shaft into the gear case so that the end of the shaft fits snugly in the back worm retainer.

4.Insert the bearing in the front worm retainer (key 48), and thread the retainer and ball bearing into the gear case. Align the slot in the retainer with the set screw hole in the gear case, insert the set screw (key 41), and tighten it.

5.Put the spring and ball (keys 56 and 55) in the handwheel (key 51). Slide the handwheel onto the worm shaft (key 45). Thread the handwheel cap (key 54) onto the worm shaft.

6.Pack the two thrust bearings (key 67) with lithium grease lubricant. Install one thrust bearing; then, install the worm gear (key 44) followed by the second thrust bearing and the bearing and gear retainer (key 66).

7.The lower sleeve (key 46) has two screw holes in one end. Coat the sleeve threads with lithium grease lubricant, slide the end of the lower sleeve with the holes into the thrust bearing (key 67), turn the handwheel, and feed the sleeve through the worm gear. Continue turning the handwheel until the lower sleeve protrudes from the gear case. Fasten the travel stop indicator (key 58) to the sleeve with the two machine screws (key 28).

8.Install the key (key 47) on the adjusting flange (key 36). Coat the adjusting flange threads with anti-seize lubricant (key 244). Install the adjusting

10

Instruction Manual

Form 1909

August 2006

657 Size 80 and 100 Actuators

flange so that the key engages the slot in the lower sleeve. Secure adjusting flange with cap screws (key 64).

9. Adjust set screws (key 40) to eliminate free play in the bearings.

Note

Over-tightening the set screws will make handwheel operation difficult.

10. Install the adjusting screw and thrust bearings (keys 12 and 35). Pack bearings with lithium grease lubricant (key 241), and install as shown in figure 7.

handwheel clockwise turns the handwheel stem (key 133, figure 6) into the diaphragm casing and forces the pressure block assembly (key 179, figure 6) against the diaphragm and diaphragm plate. Instructions are given below for complete disassembly and assembly. Perform the disassembly only as far as necessary to accomplish the required maintenance; then, begin the assembly at the appropriate step.

Key numbers refer to figure 4 for actuator parts and figure 6 for handwheel parts.

Disassembly

11.Slide the spring case (key 29) into position, and secure with cap screws (key 62).

12.Complete steps 3 through 8 of the size 80 actuator assembly section.

1. Bypass the control valve. Reduce the loading pressure to atmospheric, and remove the tubing or piping from the diaphragm casing (key 1).

WARNING

Size 80 Hydraulic Snubber

The size 80 Type 657 is available with a hydraulic snubber, as shown in figure 7, to dampen vertical instability of actuator stem movement. The snubber is adjusted by rotating the adjusting screws (key 83, figure 7) counterclockwise out of the reservoir (key 79, figure 7) to increase damping action and clockwise to decrease damping action. The adjusting screw on the right (the lower of the two adjusting screws in section B-B of figure 7) regulates downward damping action, and the screw on the left regulates upward damping action.

Size 80 Top-Mounted Handwheel

(Adjustable Up Travel Stop)

CAUTION

If repeated or daily manual operation is expected, and the actuator is equipped with a casing-mounted travel stop or top-mounted handwheel, the diaphragm could be subject to excessive wear.

The actuator should be equipped with a side-mounted handwheel, which is designed for more frequent use as a manual operator.

A top-mounted handwheel assembly is normally used as an adjustable-up travel stop to limit full retraction of the actuator stem. Turning the

To avoid personal injury from the precompressed spring force thrusting the upper diaphragm casing (key 1) away from the actuator, relieve spring compression (step 2, below), and carefully remove casing cap screws (key 141) (step 3, below).

2.Remove cover band (key 60). Insert a rod of approximately 12.7 mm (1/2-inch) diameter into a hole in the adjusting screw (key 12), and rotate the adjusting screw from right to left until spring compression is relieved. Rotate handwheel to be sure it is not compressing actuator spring.

3.Unscrew cap screws (key 141), and remove handwheel assembly.

4.Remove hex nut (key 54), and lift off the handwheel.

5.Unscrew support screws (key 182), and remove pressure block, stem, stem collar, and thrust bearing (keys 179, 133, 183, and 175).

6.Unscrew body nut (key 186), and remove gland (key 180). If necessary, remove and replace packing rings (key 181).

Assembly

1.Install new packing rings and gland (keys 181 and 180), and thread the body nut (key 186) onto the body.

2.Lubricate the thrust bearing and stem (keys 175 and 133), with lithium grease lubricant (key 241). Slide stem, stem collar, thrust bearing, and pressure

11

657 Size 80 and 100 Actuators

Instruction Manual

Form 1909

August 2006

block (keys 133, 183, 175, and 179) into the body as shown in figure 6 and install support screws

(key 182).

3.Install handwheel and hex nut (keys 51 and 54).

4.Install a new handwheel gasket (key 185).

5.Mount the handwheel assembly on the diaphragm casing, and secure with cap screws (key 141).

6.Reconnect pressure tubing or piping to actuator casing.

4.Loosen the set screws (key 41) in the front and back worm retainers (keys 48 and 49) and handwheel (key 51).

5.Remove retaining ring (key 118), and remove handwheel.

6.Remove front and back worm retainers (keys 48 and 49).

7.Remove worm shaft (key 45).

8.Pull the power screw assembly (key 122). The bearing and gear retainer, thrust bearing, and worm gear (keys 66, 67 and 44) will come out with the power screw.

Size 100 Top-Mounted Handwheel

(Adjustable Up Travel Stop)

A top-mounted handwheel assembly is normally used as an adjustable-up travel stop to limit full retraction of the actuator stem. Clockwise rotation of the handwheel (key 51) moves the actuator stem (key 10) downward, compressing the spring (key 6). Spring action returns the stem as the handwheel is turned counterclockwise. Instructions are given below for complete disassembly and assembly. Perform the disassembly only as far as necessary to accomplish the required maintenance; then, begin the assembly at the appropriate step.

Key numbers refer to figure 5 for actuator parts and figure 8 for handwheel parts.

Disassembly

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

WARNING

To avoid personal injury from the precompressed spring force thrusting the upper diaphragm casing (key 1) away from the actuator, relieve spring compression (step 2, below), and carefully remove casing cap screws (key 124) (step 3, below).

2.Rotate handwheel counterclockwise, relieving all spring compression.

3.Unscrew cap screws (key 124), and remove gear case cover (key 123).

Assembly

1.Pack the ball bearings (key 50) with lithium grease lubricant (key 241), and insert one ball bearing into the back worm retainer (key 49).

2.Thread the back worm retainer and ball bearing into the gear case. Align the slot in the worm retainer with the set screw hole in the gear case, insert set screw (key 41), and tighten.

3.Coat the worm shaft (key 45) threads with lithium grease lubricant, and slide the shaft into the gear case so that the end of the shaft fits snugly in the back worm retainer.

4.Insert the bearing into the front worm retainer (key 48), and thread the retainer and ball bearing into the gear case. Align the slot in the retainer with the hole in the gear case, insert the set screw

(key 41), and tighten.

5.Slide the handwheel onto the worm shaft

(key 45), and install retaining ring (key 118).

6.Pack the two thrust bearings (key 67) with lithium grease lubricant. Install one thrust bearing, then the worm gear (key 44), followed by the second thrust bearing and the bearing and gear retainer (key 66).

7.Coat the power screw threads (key 122) with lithium grease lubricant. Slide the power screw into the thrust bearing (key 67), turn the handwheel, and feed the sleeve through the worm gear.

8.Adjust set screws (key 40) to eliminate free play in the bearings.

Note

Over-tightening the set screws will make handwheel operation difficult.

9. Install gear case cover (key 123), and tighten cap screws (key 124).

12

Instruction Manual

Form 1909

August 2006

657 Size 80 and 100 Actuators

Parts Ordering

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

WARNING

Use only genuine Fisher replacement parts. Components that are not supplied by Emerson Process Management should not, under any circumstances, be used in any Fisher valve, because they will void your warranty, might adversely affect the performance of the valve, and might jeopardize worker and workplace safety.

Note

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

Parts List

Note

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

Type 657 Sizes 80 & 100

Key

Description

Part Number

1

Upper Diaphragm Casing

 

2*

Diaphragm

 

 

Size 80

 

 

Nitrile

1R6375X0072

 

Silicone

18B2713X132

 

Size 100, nitrile & TPES (thermoplastic polyester)

 

 

20A2551X012

3

Cap Screw

 

Key Description

Part Number

4Diaphragm Plate

5Lower Diaphragm Casing

5Lower Diaphragm Casing, Yoke, & Tie Rod Ass’y

6 Spring

See tables

8Cap Screw

9Yoke

10Actuator Stem

11Spring Seat

12Adjusting Screw

13Backup Plate

14Travel Indicator

16Hex Jam Nut

17Machine Screw

18Travel Indicator Scale

19Nameplate

20Drive Screw

21Actuator Tie Rod

22Cap Screw

23Hex Nut

26Stem Connector Ass’y

28Cap Screw

29Spring Case

33Pipe Bushing

34Upper Sleeve

35Thrust Bearing

36Adjusting Flange

60Cover Band Ass’y

62Cap Screw

63Hex Nut

88Tie Rod Washer

89Hex Nut

91Spring Guide

92Cap Screw

106Washer

107Shroud Plate

108Self-tapping screw

109Cap Screw

110Diaphragm Retainer 111* Seal Bushing, brass

 

Size 100

20A2582X012

112*

O-Ring, nitrile (2 req’d) Size 100

1H8627X0042

113*

O-Ring, nitrile Size 100

1R834206992

114Hex Nut

115Hex Jam Nut

116Actuator Stem Extension

117Washer

118Retaining Ring

120Hex Bushing

121Lifting Pin

123

Diaphragm Casing Cover

 

128

Vent Ass’y

 

241

Lithium grease (not furnished with actuator)

---

244

Anti-seize lubricant (not furnished with actuator)

---

245*

O-Ring, nitrile Size 100 only

1C339006992

*Recommended spare parts

13

657 Size 80 and 100 Actuators

Instruction Manual

Form 1909

August 2006

APPLY LUB

40A8771-B / DOC

Figure 4. Size 80 Type 657 Actuator

14

Instruction Manual

Form 1909

August 2006

657 Size 80 and 100 Actuators

APPLY LUB

50A2621-F / DOC

Figure 5. Size 100 Type 657 Actuator

15

657 Size 80 and 100 Actuators

Instruction Manual

Form 1909

August 2006

Key 6 Size 80 Actuator Spring, steel

 

COMPRESSION

 

MAXIMUM

PART

COLOR

SIZE

 

RATE

 

LOAD

 

 

NUMBER

CODE

 

Lb/in

 

N/mm

Lb

 

N

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

335

 

58.7

2480

 

11,031

1J518227082

White

 

1000

 

175.1

5630

 

25,042

1H747727082

Red

80

1650

 

288.9

7900

 

35,139

1H747527082

Lt. Blue

2100

 

367.7

10,600

 

47,148

1H747327082

Yellow

 

 

 

 

2600

 

455.3

10,600

 

47,148

1H747627082

Lt. Green

 

3100

 

542.8

13,800

 

61,382

1H747027082

White

 

 

 

 

 

 

 

 

 

Key 6 Size 100 Actuator Spring

 

COMPRESSION

 

MAX LOAD

PART

COLOR

GROUP

 

RATE

 

 

 

 

 

 

 

 

 

NUMBER

CODE

 

Lb/in

 

N/mm

Lb

 

N

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

1775

 

310.8

17,500

 

77,840

10A2561X012

None

2950

 

516.5

25,000

 

111,200

10A2562X012

None

33-1/4 Inch (844 mm)

 

 

4500

 

787.9

36,000

 

160,128

10A2563X012

None

Free Length

 

 

6000

 

1050.6

45,000

 

200,160

10A2564X012

None

 

 

 

 

 

 

 

 

 

 

 

 

 

335

 

58.6

2480

 

11,031

1J518227082

Brown

2

1000

 

175.1

5630

 

25,042

1H747727082

Red

1650

 

288.9

7900

 

35,139

1H747527082

Blue

16-1/2 Inch (419 mm)

 

 

2100

 

367.7

10,600

 

47,148

1H747327082

Yellow

Free Length

 

 

2600

 

455.2

10,600

 

47,148

1H747627082

Green

 

 

 

 

3100

 

542.8

13,800

 

61,382

1H747027082

White

APPLY LUB

CV8009-E / DOC

Figure 6. Top-Mounted Handwheel for Size 80 Actuator

16

Instruction Manual

Form 1909

August 2006

657 Size 80 and 100 Actuators

Key Description

Part Number

Key Description

Part Number

Size 80 Side-Mtd Handwheel

7 Travel Stop

17 Machine Screw

28 Machine Screw

40Set Screw

41Set Screw

44Worm Gear

45Worm Shaft

46Lower Sleeve

47Key

48Front Worm Retainer

49Back Worm Retainer

50Ball Bearing

51Handwheel

52Handgrip

53Handgrip Bolt

54Handwheel Cap

55Ball

56Spring

58 Travel Indicator

61 Grease Fitting

64Cap Screw

65Gear Case

66Bearing & Gear Retainer

67Thrust Bearing

68Cap Screw

69Indicator Scale

70Stop Indicator Bracket

71Machine Screw

243

Pliable sealant (not furnished with actuator)

---

Size 80 Top-Mtd Handwheel

(Adjustable Up Travel Stop)

51 Handwheel

54 Nut

133 Stem

141Cap Screw

142Handwheel Body

175Thrust Bearing

179Pressure Block

180Gland

181*

Packing Ring, TFE-graphite (2 req’d)

1D7496X0012

182

Support Screw

 

183

Stem Collar

 

184

Retaining Ring

 

185*

Gasket, composition

1J789504022

186

Body Nut

 

241

Lithium grease (not furnished with actuator)

 

246Spacer

247Cotter Pin

Size 100 Top-Mtd Handwheel

(Adjustable Up Travel Stop)

17 Machine Screw

40Set Screw

41Set Screw

44Worm Gear

45Worm Shaft

48Front Worm Retainer

49Back Worm Retainer

50Ball Bearing

51Handwheel

61Grease Fitting

65Gear Case

66Bearing & Gear Retainer

67Thrust Bearing

118 Retaining Ring

122Power Screw Ass’y

123Gear Case Cover

124Cap Screw

125Hex Jam Nut

126Woodruff Key

127Slot Cover

Size 80 Hydraulic Snubber

27 Piston/Piston Rod Ass’y

63 Hex Nut

72Spring Case Adaptor

73Cap Screw

74Cylinder

75Cylinder Head

76Retaining Ring

77*

O-Ring, nitrile (2 req’d)

1F449206992

78*

Piston Ring, iron (2 req’d)

1C710321992

79

Reservoir

 

80*

O-Ring, nitrile

1H624706992

81

Cap Screw

 

82*

O-Ring, nitrile (2 req’d)

1D687506992

83Valve Adj Screw

84Jam Nut

85Cap Screw

86Pipe Plug

87Pipe Plug

90

Upper Spring Seat

 

93

Hydraulic Fluid

 

94*

O-Ring, nitrile (2 req’d)

1E591406992

95Orifice

96Bypass & Check Valve Plug

97Spring

98E-Ring

99Bushing

100Flange

101Packing Sleeve

102Machine Screw

103*

Packing, nitrile (8 req’d)

1P540806992

104*

Packing, CR (chloroprene) & cotton (4 req’d)

1P540906992

105*

Packing Sleeve O-Ring, nitrile (2 req’d)

1P541206992

*Recommended spare parts

17

657 Size 80 and 100 Actuators

Instruction Manual

Form 1909

August 2006

SECTION B-B

B B

VIEW A

VIEW A

C C

SECTION C-C

APPLY LUB

50A8774-C / DOC

Figure 7. Size 80 Type 657 Actuator with Side-Mounted Handwheel and Hydraulic Snubber

18

Instruction Manual

Form 1909

August 2006

657 Size 80 and 100 Actuators

SECTION A-A

A

A

APPLY LUB

50A2622-F / DOC

Figure 8. Top-Mounted Handwheel for Size 100 Actuator

19

657 Size 80 and 100 Actuators

Instruction Manual

Form 1909

August 2006

Fisher is a mark owned by Fisher Controls International LLC, a member of the Emerson Process Management business division of Emerson Electric Co. Emerson Process Management, Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners.

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. We reserve the right to modify or improve the designs or specifications of such products at any time without notice.

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

Emerson Process Management

Fisher

Marshalltown, Iowa 50158 USA

Cernay 68700 France

Sao Paulo 05424 Brazil

Singapore 128461

www.Fisher.com

E20Fisher Controls International LLC 1973, 2006; All Rights Reserved Printed in USA