Instruction Manual 3025 Actuator D251402X012 May 2011 Fisherr 3025 Sizes P460, P462, P460-200, and P900 Diaphragm Actuator Contents Figure 1. Fisher 3025 Size P460-200 Actuator Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instruction Manual 3025 Actuator May 2011 D251402X012 Description The Fisher 3025 size P460, P462, P460-200 and P900 spring-opposed diaphragm actuators position the valve plug in the valve body in response to varying controller or valve positioner pneumatic output signals applied to the actuator diaphragm. They can be specified either direct (air-to-close) or reverse acting (air-to-open). The size P460 offers 65 mm maximum actuator travel. The sizes P462 and P900 provide 120 mm maximum actuator travel.
Instruction Manual D251402X012 3025 Actuator May 2011 If the actuator is equipped with a side-mounted handwheel, also refer to the figures 13, 14, 15 and 16. Figure 13 shows the size P460 and the size P462 side-mounted handwheel, figure 14 the size P460-200 and figure 15 illustrates the size P900.
3025 Actuator May 2011 Instruction Manual D251402X012 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 in place, screw the yoke locknut onto the valve bonnet and tighten the locknut. b. For all other yoke bosses: Slowly lower the actuator down onto the valve.
Instruction Manual D251402X012 3025 Actuator May 2011 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 the correct spring selection for your application. Or contact your Emerson Process Management sales office for assistance. After replacing the spring, repeat the steps above.
3025 Actuator May 2011 Instruction Manual D251402X012 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 travel indicator (key 113) to correspond with the screw (key 139) used as neutral position indicator. It may be necessary to take off the protective covers (key 119) by removing the cap screws and washers (keys 120 and 128).
Instruction Manual D251402X012 3025 Actuator May 2011 Key numbers refer to figures 3 through 12 unless otherwise indicated. Figure 3 and 4 show the size P460, figure 5 and 6 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 apply a temporary loading pressure to the actuator during the disassembly. Size P460 Actuator Size P460 Actuator Disassembly 1. Bypass the control valve.
3025 Actuator May 2011 Instruction Manual D251402X012 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 diaphragm casing and diaphragm plate, the hellicoils (key 58), the travel scale, screw and nuts (keys 74, 75 and 76). Size P460 Actuator Assembly 1.
Instruction Manual D251402X012 3025 Actuator May 2011 13. The first four bolts tightened should be diametrically opposed and 90 degrees apart. Tighten these four bolts to 8 NSm (6 lbfSft). 14. Tighten the remaining bolts in a clockwise, crisscross pattern to 8 NSm (6 lbfSft). 15. Repeat this procedure by tightening four bolts, diametrically opposed and 90 degrees apart, to a torque of 16 NSm (12 lbfSft). 16. Tighten the remaining bolts in a clockwise, crisscross pattern to 16 NSm (12 lbfSft). 17.
3025 Actuator Instruction Manual May 2011 D251402X012 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 the travel stop (key 41). 9. Unscrew the cap screws (key 36) and remove the flange (key 34) and gasket (key 72). 10. Unbend the ring retaining (key 59) and slide towards the casing.
Instruction Manual D251402X012 3025 Actuator May 2011 10. Install the diaphragm casing (key 3) so that the vent and air connection are diametrically opposed. Take care when lowering the casing around the stem so that the threads do not damage the bushing. 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 sequence with a manual torque wrench.
3025 Actuator Instruction Manual May 2011 D251402X012 procedures in the Side- Mounted Handwheel Maintenance section to complete the actuator assembly (from step 9). 25. Lift the actuator and place it onto the yoke. Insert the cap screws (key 77) and tighten them. 26. If removed, screw the vent (key 49) into the diaphragm casing (key 3). 27. Mount the actuator onto the valve in accordance with the procedures in the Installation section. Size P460-200 Actuator Size P460-200 Actuator Disassembly 1.
Instruction Manual 3025 Actuator D251402X012 May 2011 16. Unscrew the cap screws (key 25), disassemble the ring (key 24), the diaphragm (key 47) and the diaphragm plate (key 26). 17. Unscrew the cap screws (key 70), remove the wiper ring and the seal retainer (key 4 and 5) and the O-ring (key 6). 18. If required, remove the casing bushings (keys 7 and 33) and the pins (key 28) from the diaphragm plate and casing. If required, remove the travel scale, screw and nuts (keys 74, 75 and 76).
3025 Actuator Instruction Manual May 2011 D251402X012 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 screws and nuts in the following manner. 13. The first four bolts tightened should be diametrically opposed and 90 degrees apart. Tighten these four bolts to 8 NSm (6 lbfSft). 14.
Instruction Manual 3025 Actuator D251402X012 May 2011 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 (key 44), the lifting lug (key 40) and the gasket (key 71). If required, loosen the locknut (key 42) and remove the travel stop (key 41). 9.
3025 Actuator Instruction Manual May 2011 D251402X012 2. Place the wiper rings (key 4) into the seal retainers (key 5). Apply lithium grease (key 201) to the O-rings (key 6), the wiper ring and seal retainer assemblies and install them into the diaphragm casings (key 1). Then insert the cap screws (key 21) and tighten them. 3. If removed, insert the pins (key 28) into the spring seat (key 29) and diaphragm plate (key 26). 4.
Instruction Manual D251402X012 3025 Actuator May 2011 13. 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 screws and nuts in the following manner. 14. The first four bolts tightened should be diametrically opposed and 90 degrees apart. Tighten these four bolts to 8 NSm (6 lbfSft). 15.
3025 Actuator Instruction Manual May 2011 D251402X012 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 screws and nuts in the following manner. 28. The first four bolts tightened should be diametrically opposed and 90 degrees apart. Tighten these four bolts to 8 NSm (6 lbfSft). 29.
Instruction Manual D251402X012 3025 Actuator May 2011 Figure 2. Side Mounted Handwheel 3. Remove the stem connector cap screws (key 87), the anti-rotator (key 78), the spacer if used (key 86) and the travel scale indicator (key 85). For the sizes P460, P462 and P460-200, loosen stem connector halves cap screws and nuts (keys 80 and 81) and unscrew the connector halves. For the size P900, unscrew the stem connector locknuts (keys 82 and 83) and then the connector halves. 4.
3025 Actuator Instruction Manual May 2011 D251402X012 14. If required, the driving shaft assembly can be broken down by removing the nut (key 118), the washer (key 117), the rotation indicator (key 114.5), the handwheel (key 116), and then the driving shaft (key 114.4) and the bearing (key 114.3). If required, remove the cap screws and nuts (keys 114.9 and 114.10) of the anti-rotator clamped on the driving shaft housing (key 114.1), the anti-rotator (key 114.7), the spacer (114.
Instruction Manual D251402X012 3025 Actuator May 2011 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: a. For an air-to-open actuator: position the bridge (key 112) at the lower location and wedge it by inserting the stoppage part (key 121) into the two holes.
Instruction Manual 3025 Actuator May 2011 D251402X012 Parts List Note Part numbers are shown for recommended spares only. For part numbers not shown, contact your Emerson Process Management sales office.
Instruction Manual 3025 Actuator D251402X012 Key Description 201 202 Lithium Grease Anti-Seize Lubricant May 2011 Key Part Number Part Number 114.9 Hex Head Cap Screw 114.
Instruction Manual 3025 Actuator May 2011 D251402X012 Key 30 Size P462 Actuator Spring TRAVEL DIAPHRAGM PRESSURE RANGE mm (Inches) bar 29 (1-1/8) --- --- --- 1.7-2.2 32 --- --- --- 1.7-2.3 38 (1-1/2) --- --- --- 1.7-2.4 45 --- --- --- 1.7-2.5 51 (2) --- 1.1-1.8 --- 1.6-2.5 55 --- 1.1-1.9 --- 1.6-2.5 65 --- 1.1-2.0 --- 1.4-2.5 76 (3) 0.5-0.9 1.1-2.2 1.5-2.4 --- 80 0.5-0.9 1.1-2.3 1.5-2.4 --- 100 0.5-0.9 --- 1.3-2.5 --- 102 (4) 0.5-1.1 --- 1.3-2.
Instruction Manual D251402X012 3025 Actuator May 2011 Figure 3.
3025 Actuator May 2011 D251402X012 Figure 4.
Instruction Manual D251402X012 3025 Actuator May 2011 Figure 5.
Instruction Manual 3025 Actuator May 2011 D251402X012 Figure 6.
Instruction Manual D251402X012 3025 Actuator May 2011 Figure 7.
Instruction Manual 3025 Actuator May 2011 D251402X012 Figure 8.
Instruction Manual D251402X012 3025 Actuator May 2011 Figure 9.
3025 Actuator May 2011 D251402X012 Figure 10.
Instruction Manual D251402X012 3025 Actuator May 2011 Figure 11.
3025 Actuator May 2011 D251402X012 Figure 12.
Instruction Manual D251402X012 3025 Actuator May 2011 Figure 13.
3025 Actuator May 2011 D251402X012 Figure 14.
Instruction Manual D251402X012 3025 Actuator May 2011 Figure 15.
3025 Actuator May 2011 D251402X012 Figure 16.
Instruction Manual D251402X012 3025 Actuator May 2011 39
3025 Actuator May 2011 Instruction Manual D251402X012 Fisher is a mark owned by one of the companies in 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.
