Flowserve Spring Diaphragm Rotary Actuators Manual de usuario Pagina 11

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Spring Diaphragm Rotary Actuators FCD VLAIM050-01 – 05/12
flowserve.com
Flowserve and Valtek are registered trademarks of Flowserve Corporation.
Troubleshooting Rotary Actuators
Failure Probable Cause Corrective Action
Actuator operates, shaft
does not rotate
1. Broken actuator stem 1. Replace actuator stem
2.Brokenclevis(364)ormissingsnaprings(250)thatallowed
pin to move
2. Replace clevis if broken, and make sure the snap
rings are snugly placed into the snap ring groove
3. Torn or broken diaphragm 3. Replace diaphragm
High air consumption
or leakage
1. Leaks in the air supply or instrument signal system 1. Tighten connections and replace any leaking lines
2. Malfunctioning positioner 2. Refer to positioner’s maintenance instructions
3. Broken diaphragm or 0-ring seal 3. Replace diaphragm or 0-ring seal
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