Emerson Fisher 3025- Manuals

Page 2 - Instruction Manual; Description; Specifications; Installation

Instruction Manual D251402X012 3025 Actuator May 2011 2 Description The Fisher 3025 size P460, P462, P460-200 and P900 spring-opposed diaphragm actuators position the valve plug inthe valve body in response to varying controller or valve positioner pneumatic output signals applied to the actuatordia...

Page 3 - Mounting the Actuator on the Valve; CAUTION

Instruction Manual D251402X012 3025 Actuator May 2011 3 If the actuator is equipped with a side-mounted handwheel, also refer to the figures 13, 14, 15 and 16. Figure 13shows the size P460 and the size P462 side-mounted handwheel, figure 14 the size P460-200 and figure 15 illustratesthe size P900. C...

Page 4 - Travel Stop Adjustment; WARNING

Instruction Manual D251402X012 3025 Actuator May 2011 4 2. Lift or hoist the actuator onto the valve bonnet: a. For the 3-9/16 yoke boss: Slowly lower the actuator down onto the valve. As the yoke passes over the end of the valve stem, place the yoke locknut over the valve stem. Once the actuator is...

Page 5 - Installing the Stem Connector Assembly

Instruction Manual D251402X012 3025 Actuator May 2011 5 5. If the travel span is not correct, a wrong or damaged spring has been installed in the actuator. To obtain the correct spring sizing information, refer to Fisher Catalog 14, Actuator Sizing and Sample Calculations to determine thecorrect spr...

Page 6 - Loading Connection; Maintenance; Actuator Maintenance

Instruction Manual D251402X012 3025 Actuator May 2011 6 11. If the actuator is equipped with a side-mounted handwheel, insert the screw (key 139) and the nut (key 140) into the stem connector half (key 78). Then screw the nut against the stem connector half. Adjust the handwheel travelindicator (key...

Page 7 - Size P460 Actuator Disassembly

Instruction Manual D251402X012 3025 Actuator May 2011 7 Key numbers refer to figures 3 through 12 unless otherwise indicated. Figure 3 and 4 show the size P460, figure 5 and6 the size P462, figure 7 and 8 the size P460-200 and figures 9 through 12 illustrate the size P900. It may be necessary to app...

Page 8 - Size P460 Actuator Assembly

Instruction Manual D251402X012 3025 Actuator May 2011 8 16. From the diaphragm casing (key 1) remove the retaining ring (key 8), the wiper ring and the seal retainer (keys 4 and 5) and the O-ring (key 6). 17. If required remove the casing bushings (keys 7 and 33), the pins (key 28) from the diaphrag...

Page 9 - Size P462 Actuator Disassembly

Instruction Manual D251402X012 3025 Actuator May 2011 9 13. The first four bolts tightened should be diametrically opposed and 90 degrees apart. Tighten these four bolts to 8 N S m (6 lbf S ft). 14. Tighten the remaining bolts in a clockwise, crisscross pattern to 8 N S m (6 lbf S ft). 15. Repeat th...

Page 10 - Size P462 Actuator Assembly

Instruction Manual D251402X012 3025 Actuator May 2011 10 7. Remove the yoke cap screws (key 77), then lift the actuator off the yoke. 8. Remove the lifting lug cap screws (key 44), the lifting lug (key 40), the gasket (key 71) and the spacer if used (key 67). If required remove the cap (key 43) and ...

Page 14 - Size P900 Actuator Disassembly

Instruction Manual D251402X012 3025 Actuator May 2011 14 12. Align the diaphragm casings and diaphragm holes. Be sure the vent and air connection on the diaphragm casings are still diametrically opposed. Install the cap screws and nuts (keys 45 and 46). Tighten the diaphragm cap screwsand nuts in th...

Page 15 - Size P900 Actuator Assembly

Instruction Manual D251402X012 3025 Actuator May 2011 15 6. To separate the actuator from the valve body, remove the yoke locknut or the bolts and then lift off the actuator.7. Remove the yoke-to-actuator cap screws (key 77), then lift the actuator off the yoke.8. Remove the lifting lug cap screws (...

Page 18 - Side-Mounted Handwheel Maintenance; Side-Mounted Handwheel Disassembly

Instruction Manual D251402X012 3025 Actuator May 2011 18 27. Align the diaphragm casings and diaphragm holes. Be sure the vent and air connection on the diaphragm casings are still diametrically opposed. Install the cap screws and nuts (keys 45 and 46). Tighten the diaphragm cap screwsand nuts in th...

Page 21 - Parts Ordering

Instruction Manual D251402X012 3025 Actuator May 2011 21 11. For sizes P900 and P460-200 only, screw the actuator stem locknut away from the from the connector half location. 12. Screw the stem connector half (key 124) onto the actuator stem.13. Perform one of the following procedures as appropriate...

Page 22 - Parts List

Instruction Manual D251402X012 3025 Actuator May 2011 22 Parts List Note Part numbers are shown for recommended spares only. For partnumbers not shown, contact your Emerson Process Management salesoffice. Actuator Assembly (figures 3through 12) Key Description Part Number 1 Lower Diaphragm Casing 2 ...