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:
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. Rotate the connector half so that the distance between the bridge
and the connector half is equal to the valve travel. Be sure that the actuator stem threads are engaging the
threads of the stem connector by the distance of at least one diameter of the stem. Then slowly decrease the
diaphragm pressure until the connector half is contacting the bridge and line up the stem connector half.
b.
For an air-to-close actuator:
position the bridge (key 112) at the upper location and wedge it by inserting the
stoppage part (key 121) into the two holes. Rotate the connector half so that it is contacting the bridge and line
it up.
14. Install the cap screws (key 125 or 137) and tighten them.
15. For the sizes P460 and P462, install the cap screw and nut (key 130 and 131) and tighten them. For the sizes P900
and P460-200, screw the actuator stem locknut against the stem connector half.
16.
For an air-to-open actuator only:
slightly pressurize the actuator diaphragm until movement of actuator stem is
detected.
WARNING
To avoid personal injury due to sudden uncontrolled movement of parts, do not remove the stoppage part of the bridge
when the connector has spring force applied to it.
17. Remove the stoppage part from the bridge and install it into the protective cover for the sizes P460, P462 and
P900 or into the top holes of the handwheel yoke for the size P460-200.
18. For the size P460-200 only, Place the two bellows (keys 134, 135 and 133).
19. Install the travel indicator (key 113) by tightening the cap screw or nuts.
20. Lift the actuator and handwheel assembly and place it onto the yoke. For the sizes P460, P462 and P900 insert the
cap screws (key 122). For the size P460-200 insert the cap screws and nuts (keys 122 and 132). Then tighten them.
21. Mount the actuator and handwheel assembly in accordance with the procedures in the Installation section.
Parts Ordering
Each actuator has a serial number stamped on the nameplate. Always mention this number when corresponding with
your Emerson Process Management sales office regarding technical information or replacement parts. Also, reference
the complete part number of each part needed as 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 may void your warranty, might adversely affect the
performance of the valve, and could cause personal injury and property damage.
Note
Neither Emerson, Emerson Process Management, nor any of their affiliated entities assumes responsibility for the selection, use, or
maintenance of any product. Responsibility for the selection, use, and maintenance of any product remains with the purchaser and
end‐user.
