Disassembly procedures, Reassembly procedures, Changing number of spring – Flowserve SX-Series SuperNova User Manual

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Flowserve Corporation

765 South 100 East

Phone: 801 373 3028

Flow Control Division

Provo, Utah 84606-6160

Facsimile: 801 489 2228

Automation Business Unit

www.flowserve.com

Email: [email protected]

Automax Valve Automation Systems

Installation, Operation and Maintenance Instructions

Maintenance Instructions

Disassembly Procedures

1. Disconnect all air and electrical supplies from actuator.

2. Remove all accessories from actuator and dismount actuator

from valve.

3. Position actuator with air supply ports facing you. Apply air

pressure to Port 2 to release spring pressure from the Stop

Bolt (9).

4. Remove the Stop Bolt Retaining Nut (14), Washer (15),

and O-ring (16) on the Left Endcap (19) and turn the Stop

Bolt (9) clockwise into the Body (1) until it is flush with the

Endcap (19).

5. Exhaust air from Port 2, the Stop Bolt (9) should now turn

freely. Continue turning Stop Bolt (9) clockwise until it is

disengaged from the Endcap.

CAUTION: Unload springs before removing pinion to eliminate

possible spring side loading that could scratch the

pinion bore.

6. Spring Return Actuator:

CAUTION: Follow step 4 to relieve force on inward travel stop

before proceeding.

CAUTION: Do not use impact wrench to remove endcap screws.

Failure to follow this precaution could result in bolts

binding in the body.

To remove Spring Return Endcap, first completely remove

two diagonal Endcap Screws (21) from one Endcap. The two

remaining Endcap Screws should be removed evenly. As

the Screws are removed, the springs will push the Endcap

out. Repeat for opposite side. The springs will be totally

unloaded before the screws are completely unthreaded.

Remove the springs (23,24,25.)

Double Acting Actuator: Remove the 8 Endcap Screws (21). Step

7 will push the Endcaps (18,19) from the Body (1).

CAUTION: Do not use impact wrench to remove endcap screws.

Failure to follow this precaution could result in bolts

binding in the body.

7. Rotate Pinion (3) counterclockwise (DA & SR-FCW) or

clockwise (DR & SR-FCCW) to drive the Pistons (2) off the

end of the rack. Pull the Left Piston (2) from the body (1) by

Reassembly Procedures

1. Inspect all parts for wear and replace any worn parts as needed.

Replace all ‘O’-rings.

2. Clean all components and lightly grease cylinder bore, pinion and

seals with a high performance grease such as Dow 55. Lubricate

endcap screw (21) threads with similar grease.

3. Reverse the disassembly procedures to reassemble.

4. The standard Pinion (3) orientation is with the flats on top of

pinion perpendicular with the body (1) in the CW position.

5. When fitting the Pistons (2) ensure the teeth engage the Pinion

(3) at the same time by measuring in from the edge of the body

(1) the same distance from each end. Note: the orientation of the

pistons will determine the operation of the actuator. Refer to the

diagrams under “Operation” for correct piston position.

6. Test the actuator for smooth operation and air leakage at service

pressure before installing.

Changing Number of Spring

1. Follow the Disassembly Procedures through step 5.

2. Determine nested spring combination of inner, middle and outer

springs. Consult catalog torque charts, distributor or factory.

Insert appropriate springs into cylinder. Springs must be

properly seated against piston and endcap to assure that

springs do not bind.

3. Re-assemble the actuator.

➁ SX050 has maximum of 2 springs per

endcap

➁ Install springs on opposite sides

Note: ➁ #1 Spring has one color code dot

#2 Spring has two color code dots

#3 Spring has three color code dots

Spring chart SX063-SX150

Spring Combination ➁

Spring Group

#1 Spring

#2 Spring

#3 Spring

(inner)

(middle)

(outer)

4 2

1➁ 1➁

1➁ 1➁ 2

Spring chart SX050 ➁

Spring Combination ➁

Spring Group

#1 Spring

#2 Spring

#3 Spring

(inner)

(middle)

(outer)

1➁ 1➁

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pulling on the Stop Bolt (9).

8. Remove the Right Piston (2) by pushing out through inside

of Body (1).

9. Remove the Pinion Snap Ring (5) and Pinion Washer (4), and

pinion thrust washer (26).

10. Tap Pinion (3) lightly with plastic mallet to remove.