9650 Valve Series
Installation and Maintenance Manual
28
5.2
MAINTENANCE - REPLACING ACTUATOR
Caution: following ANY valve maintenance it is required to fully test valve operation and to complete fps valve
automated valve repair check sheet FP081.0.
Note: FPS does not authorize body or actuator repairs on FM approved valves. Please contact the factory for any
replacement of valve or actuator.
Procedure shows a watertight limit switch, explosion proof is similar.
Disassembly:
To remove the actuator:
1)
Ensure valve is in its fail-safe (not actuated) position fully open or closed before disassembly. Pressure trapped
in the valve or actuator if partially stroked or a partially compressed actuator spring could be hazardous.
2)
De-pressurize process media and instrument air and turn off electrical power to the valve before attempting
any repair.
3)
Remove limit switch and solenoid by following the steps in sections 3 and 4 above.
4)
Remove the four nuts or bolts holding the actuator onto the valve and remove the actuator. Valve sizes larger
than 2 inch and all flanged valves use bolts while smaller valves use studs threaded in the actuator and nuts.
5)
Remove the actuator taking care not to lose the adapter insert circled. Take note of the order of assembly.
6)
If the solenoid used in the assembly is a NAMUR mount, and the actuator is to be replaced, not the location of
the set screw A, used to locate the solenoid adapter plate and remove it.
