An operator tells you that a control valve in a stuck? How will you start checking?


#1
  • First of all get the control valve is passed from operation.
  • Check the lingual to the diaphragm of the control valve.
  • Disconnect it possible the actuator stem from the control valve stem.
  • Stroke the actuator and see whether the actuator operates or not. It not then the diaphragm may be punctured.
  • If the actuator operates connect it back to the plug stem stroke the control valve. If it does not operate loosen the gland nuts a bit and see if it operates. If it does not then the control valve has to be removed from the line to w/shop.