9650 Valve Series
Installation and Maintenance Manual
20
4.4
MAINTENANCE - REPLACING LIMIT SWITCH
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.
Procedure shows a watertight limit switch (6010-1008), follow a similar procedure for the explosion proof model
(6010-1009).
For explosion proof limit switches (6010-1009) limit switch must be wired as per Class 1 Division 2 wiring methods
using class 1 Division 2 rated sealing fittings as required.
Disassembly:
To remove the limit switch:
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 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 cover by loosening four capscrews.
4)
Disconnect the two power leads from the limit switch terminal block and the ground lead from the ground stud.
Also remove all field connections, taking note of where each lead is landed.
