OMC RE20 - Rotary Positioner Installation Steps

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Installation
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O
p
eration and Maintenance Manual ManRE20en Rev.06/2022
OMC S.p.A: Via G. Galilei, 18 - 20060 - Cassina de Pecchi (MI) - ITALY - www.omcvalves.com - Tel.: (+39) 02.95.28.468
Fig. 3-11: Actuator stem Height Fig. 3-12: Exploded Brackets
3.4.3 Rotary positioner Installation Steps
1. Please check the actuator’s stem height and adjust the brackets by referring to the above
bracket table.
2. Attached the brackets onto the actuator. It is recommended to use spring washer so the bolts
will not be loosen from vibration.
3. Set rotation position of the actuator stem at 0%. For single acting actuator, it is easy to check 0%
point by supplying no pressure to the actuator. For double acting actuator, check actuator stem’s
rotation direction – clockwise or counter-clockwise - by supplying pressure to the actuator.
4. Attach the positioner to the bracket. Setting alignment of center of main shaft of the positioner
and center of the actuator’s stem is very important. Poor alignment of the main shaft and the
actuator’s stem decreases the positioner’s durability due to unnecessary forces on the main shaft.
Fig. 3-13: Main shaft center alignment
5. Tighten the positioner and the bracket with bolts after checking the positioner’s position.