Samson 3351 - User Manual

Questions and Answers

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Jessica DayJul 28, 2025
What to do if the Samson Control Unit valve leaks to the atmosphere?
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  Nicholas BriggsJul 28, 2025
  If the Samson Control Unit valve leaks to the atmosphere, it could be due to several reasons. The packing might be defective, requiring replacement. Also, a defective diaphragm could be the cause, which would also need replacing. Another possibility is a loose flanged joint or a worn-out gasket, in which case you should check the flanged joint and replace the gasket if necessary.
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randall93Aug 5, 2025
Why doesn't the Samson Control Unit actuator and plug stem move on demand?
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  Susan Hernandez DDSAug 5, 2025
  If the Samson Control Unit actuator and plug stem do not move on demand, it could be due to a blocked actuator. Check the attachment and remove any blockage, remembering to disconnect and lock the pneumatic air supply and control signal first. It could also be caused by a defective diaphragm, which would need to be replaced. Another cause could be signal pressure being too low, so check the signal pressure and the signal pressure line for any leakage.
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Seth HerringAug 11, 2025
What to do if there is increased flow through closed Samson 3351 valve?
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  nicholsonthomasAug 11, 2025
  If you notice increased flow through a closed Samson Control Unit valve, it may be due to dirt or foreign particles lodged between the seat and plug. Try shutting off the pipeline section and flushing the valve. Alternatively, the valve trim could be worn out, requiring replacement of the seat and plug. Damaged facing may also be the cause.
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michelleaguirreAug 20, 2025
How to fix Samson 3351 actuator and plug stem not stroking through full range?
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  loritaylorAug 20, 2025
  If the Samson Control Unit actuator and plug stem do not stroke through the full range, it could be due to low signal pressure. Ensure you check the signal pressure and the signal pressure line for leaks. Also, verify the settings of the valve accessories, as an incorrect setting can cause this problem.
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БекзатAug 14, 2025
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