Flowserve Spring Diaphragm Rotary Actuators Manuel d'utilisateur télécharger pdf (Page 11)

Spring Diaphragm Rotary Actuators FCD VLAIM050-01 – 05/12

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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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Flowserve Spring Diaphragm Rotary Actuators Manuel d'utilisateur Page 11