529 Actuator Instruction Manual

Instruction Manual Form 5428 December 1996

Type 529

Type 529 Size 10 Actuator Introduction Scope of Manual This instruction manual includes installation, maintenance, and parts information for the size 10 Type 529 actuator. Refer to separate manuals for instructions covering the valve, positioner, and accessories.

Only persons qualified through training or experience should install, operate, and maintain these actuators.

If you have any questions about these instructions, contact your Fisher Controls sales office or sales representative before proceeding.

Description The Type 529 size 10 actuator is a compact spring diaphragm actuator design. The multiple-spring actuator is field reversible without extra parts to provide either fail-open or fail-closed action. Materials of construction include an epoxy-coated steel diaphragm case and a cast iron yoke. All remaining parts are either stainless or cadmium plated steel for optimum corrosion resistance.

Actuator spring ranges listed in table 1 are the air pressure range in pounds per square inch (psi) for rated stroke under no load. Air connections are 1/4-inch NPT and are located in both the upper (key 44) and lower (key 43) diaphragm case. Use upper connection for fail-open actuator and lower connection for fail-closed actuator. Air pressure should not exceed 35 psi. Higher pressures will cause diaphragm leakage.

W6806/IL

Figure 1. Type 529 Size 10 Actuator Mounted on 1/2-Inch Design CP Control Valve

2. Place locknuts (key 27) and travel indicator (key 58) on the valve stem as low as possible and counter the two nuts. This allows rotation of the plug stem into the actuator stem (key 26). Make sure the yoke drive nut (key 9) and packing nut (key 20) are first placed over the stem.

3. Apply approximately 10 psi air pressure to the actuator and screw the valve stem clockwise into the actuator stem (key 26), until the yoke (key 17) rests firmly on the valve bonnet.

4. Tighten the yoke drive nut (key 9).

When assembling the actuator to a valve or another device that provides a positive stop in one direction, proceed as follows: 1. Refer to the appropriate control valve instruction manual and locate the following items essential for actuator mounting and calibration: Stem locknuts, travel indicator, packing nut, and yoke drive nut.

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.

Fisher Controls International, Inc. 1996; All Rights Reserved

a. Fail-open actuator: Continue to screw the valve stem into the actuator stem (key 26) until the valve plug is stopped by the valve bonnet in the upper stroke position. Apply some air pressure, and turn the valve stem one extra full turn, then lock the stem position with the locknuts. Apply maximum air signal and check if the valve plug is fully seated.

Calibrate the travel indicator scale (key 56) at this position.

D102335X012

Stroke Adjustment

Type 529 Note If the valve plug is not seated properly, turn the valve stem back out of the actuator stem.

Never turn the valve stem while the plug is seated; the seating surface will be damaged. b. Fail-closed actuator: With 10 psi air signal, screw the valve stem into the actuator stem (key 26) as far as it will go. Reduce the air pressure to zero and slowly turn the valve stem back out of the actuator stem (key 26) until the valve plug touches the seat. Reapply the air signal and turn the valve stem 1 to 1-1/2 additional turns out of the actuator stem. Lock the valve stem in position with locknuts and calibrate the travel indicator scale (key 56) at the zero stroke position.

Actuator Removal from Valve 1. For Fail-open actuator (”air-to-close” action with globe valve), disconnect the air line and any accessories connected to the upper diaphragm case.

This will insure that the valve plug is fully lifted from the valve seat.

For Fail-closed actuator, (”air-to-open” action with globe valve), apply 15 psi air signal to the connection located in the lower diaphragm in order to lift the plug completely from the seat.

2. Place a wrench on the machined flats of the actuator stem. With an additional wrench, engage the upper stem locknut and back-out the plug stem approximately 1/4-inch. (This procedure will prevent the actuator stem from rotating and causing possible damage to the diaphragm).

WARNING Avoid personal injury or property damage from sudden release of process pressure or bursting of parts. Before performing any maintenance operations: D Disconnect any operating lines providing air pressure, electric power, or a control signal to the actuator. Be sure the actuator cannot suddenly open or close the valve.

D Use bypass valves or completely shut off the process to isolate the valve from process pressure. Relieve process pressure from both sides of the valve.

Drain the process media from both sides of the valve.

D Vent the power actuator loading pressure and relieve any actuator spring precompression.

D Use lock-out procedures to be sure that the above measures stay in effect while you work on the equipment.

When performing maintenance procedures, isolate the control valve from the process line pressure, release pressure from both sides of the valve body, and drain the process media from both sides of the valve. Use lock-out procedures to be sure that the above measures stay in effect while you are working on the actuator.

A routine maintenance schedule might include the replacement of the O-rings seal (key 50) or the diaphragm (key 39). To do this, proceed as follows: 1. Disconnect the air line from the actuator and positioner if applicable.

2. Remove the actuator from the valve.

3. Loosen the packing nut and yoke drive nut. Rotate the actuator assembly until it is disengaged from the plug and stem. Keep the valve stem from turning. Remove the locknuts and indicator disk from the plug stem and lift the actuator assembly off the bonnet.

3. Remove eight cap screws (key 45) and lift the diaphragm cover off.

4. Pull the actuator stem (key 26) with the diaphragm plate and diaphragm out of the guide bushing (key 54).

5. Clamp the lower wrench flat of the stem (key 26) into a vise and unscrew the locknut (key 30).

Maintenance Actuator parts are subject to normal wear and must be inspected and replaced when necessary. The frequency of inspection and replacement depends on the severity of service conditions. Because of the care Fisher Controls takes in meeting all manufacturing requirements (such as heat treating and dimensional tolerances), use only replacement parts manufactured or furnished by Fisher Controls.

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6. Remove and replace the diaphragm (key 39) and O-ring seal (key 50). Note the position of individual parts.

7. Replace the springs if necessary.

8. Apply some light grease to the O-ring and stem surface.

9. Reassemble all parts onto the actuator stem in their correct order.

Type 529 Table 1. Parts List SIZE 10 ACTUATOR KEY NUMBER 17 19*

1/2-Inch Stroke

DESCIPTION Part Number

Quantity

Yoke

24184

1

Gasket (Standard)

(2)

Gasket (Hi-Temp)

(2)

ACTUATOR SPRING 3-13 psi (ATE)

24820 (RS) (3)

6

5-15 psi (ATR)

24820 (RS) (3)

6

26

Actuator Stem

24613

1

30

Nut, Nyloc

(2)

Diaphragm Kit (Standard)

24462

1

Diaphragm Kit (Hi-Temp)

24464

1

40

Diaphragm Plate

24811

1

43

Diaphragm Case (Lower)

011767-004-999

1

44

Diaphragm Case (Upper)

011766-001-999

1

45

Cap Screw

971002-009-250

8

46

Nut

971511-011-250

8

50*

O-ring (Viton)

(2)

54

Guide Bushing

007695-158-485

1

56

Travel Indicator Scale

983674-001-250

1

57

Machine Screw

971302-003-250

2

62

Serial Plate

983753-001-600

1

64

Cap Screw

971000-007-250

6

79

Stop Cup

24116(1)

1

92*

Seal Washer

(2)

112

Washer

25861-24

1

113

Vent Plug

24147

1

115

Stop Collar

24187

1

119

Drive Screw

24686

2

22

39*

1. Use stop cup part number 24830 for 1/2 inch stroke, 3-10 psi and 8-15 psi bench range.

2. Gasket (19), Locknut (30), O-ring (50), and Seal Washer (92) included with diaphragm kit item 39.

3. Letters in brackets denote color code: (RS) = Red and Silver

10. For fail-open, hold the actuator stem assembly in a vise upside down (vise gripping the locknut (key 30)). Place the springs (key 22) onto the guides of the diaphragm plate (key 40) and slide the lower diaphragm case (key 43) with yoke (key 17) attached over the actuator stem (key 26).

Note the position of the cap screws (key 64) when the outer bolt holes of the lower diaphragm case line up with those of the diaphragm (key 39). If there is interference with the springs (key 22), rotate the case (key 43) into another position. Next, compress the springs (key 22) slightly and remove the assembly from the vise. Now flip over all parts and reattach the upper diaphragm case (key 44) to the assembly by inserting eight cap screws (key 45). Tighten the eight nuts (key 46) evenly and crosswise. It may be necessary to compress the springs (key 22) slightly to start the nuts (key 46).

*Recommended spare parts

For fail-closed actuator, place the actuator stem (key 26), with all assembled parts, into the guide bushing (key 54). Place the springs (key 22) over the guide protrusions of the diaphragm plate (key 40) and place the upper diaphragm cover (key 44) on top of the springs. Insert the cap screws (key 45). Push down the upper diaphragm cover somewhat to engage the hex nuts (key 46) and proceed in a crosswise fashion to tighten all the nuts evenly.

11. Apply air pressure to the actuator and check for friction or leakage. The actuator should travel smoothly with less than 0.2 psi deadband. Apply some water to the stem seal and outer diaphragm rim to check for leakage.

3

Type 529

B2524/IL

Figure 2. Type 529 Size 10 Actuator Assembly

For information, contact Fisher Controls: Marshalltown, Iowa 50158 USA Cernay 68700 France Sao Paulo 05424 Brazil Singapore 0512 4 Printed in U.S.A.