Flowserve Valtek GS User Manual (English)

Questions and Answers:

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Jacqueline FerrellAug 3, 2025
How to fix a Flowserve Valtek GS when the stem does not move?
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  Dr. Denise LewisAug 3, 2025
  If the stem of your Flowserve Control Unit isn't moving, here's what to check: * For pneumatic actuators: ensure there are no leaks in the supply and that the air pressure is at the recommended level (usually 87 psig; 6 bar). * For electrical actuators: verify the power supply, checking connections, circuit breakers, and voltage. Also, excessive tightening of the packing box can prevent movement; loosen the packing follower until the valve operates properly, ensuring there are no leaks. If these steps don't resolve the issue, further inspection or professional assistance may be required.
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Brandy KellyAug 8, 2025
What to do if the Flowserve Valtek GS Control Unit stem travel is less than full stroke?
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  Dylan GreenAug 8, 2025
  If the stem travel of your Flowserve Control Unit is less than the full stroke (0 to 100%), consider the following: * For pneumatic actuators, ensure the air supply pressure matches the pressure specified on the serial plate (European production only) and check the handwheel position. * For electric actuators, verify the limit switches are properly adjusted according to the actuator manufacturer’s specifications. Also, inspect the positioner and readjust it to the positioner manufacturer’s specification if necessary.
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robertrossAug 13, 2025
How to stop a Flowserve Control Unit packing box system from leaking?
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  Lisa WilliamsAug 13, 2025
  To address a leaking packing box system in your Flowserve Control Unit: * Slightly retighten the packing box, but be careful to ensure the stem can still move freely. * Clean the stem with a suitable cleaning agent to remove any dirt that may be contributing to the leak. If retightening doesn't solve the problem, the packing may be worn.
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kaufmankevinAug 18, 2025
Why is the stem movement jerky in my Flowserve Valtek GS Control Unit?
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  Alexander MccormickAug 18, 2025
  Jerky stem movement in a Flowserve Control Unit may be due to a defective electric actuator, in this case you should clean the stem with suitable cleaning agent. Another cause can be that the actuator is not powerful enough. Compare the actuator specifications on the serial plate with the operation specifications of the facility.