Emerson EL-O-Matic F Series - Appendix: A Spring load removal; A.1 Spring load relief

Appendix
Appendix: A Spring load removal
This section explains:
• How to remove the spring load safely of spring-return actuators in case:
— The valve gets “stuck” in mid position.
— One of the spring cartridges is broken.
WARNING: MOVING PARTS
A spring-return actuator mounted on a valve, which is stuck in mid stroke, contains a high
spring load which will cause a sudden rotation of the actuator versus the valve during
disassembly. This can cause serious injury to personnel or damage to material.
On spring-return actuators with a broken spring cartridge, the end cap can be “shot” away
during disassembly of the actuator. This can cause serious injury to personnel or damage to
material.
A.1 Spring load relief
CAUTION: ROTATING ACTUATOR
In case of an actuator/valve assembly “stuck” in mid position, leave the actuator on the
valve and/or mounting bracket during this procedure.
Figure A-1 Spring load removal
Crush / Amputaion Hazard
Failure to follow instructions
for removal of spring loaded
actuator may result in
surious personal injury
WARNING
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Installation, Operation and Maintenance Manual
DOC.IOM.EF.EN Rev. 7
September 2017
53
Appendix