Samson 3349 - User Manual

Questions and Answers

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Michael BrownAug 11, 2025
Why is my Samson Control Unit valve leaking to the atmosphere?
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  chuffAug 11, 2025
  The valve may leak to the atmosphere due to several reasons: * The diaphragm is not correctly clamped into position. Ensure it is correctly seated, and replace it if necessary. * The diaphragm is damaged and needs replacement. * The packing is defective and needs replacement. * For versions with adjustable packing, the packing may not be tightened correctly. Adjust the packing accordingly. Contact after-sales service if the leak persists. * A flanged/threaded/clamped joint may be loose, or the gasket may be worn out. Check the pipe connection and replace the gasket if necessary.
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Cindy WilliamsAug 16, 2025
What to do if the actuator and plug stem of my Samson Control Unit does not move?
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  Brian RobertsAug 16, 2025
  If the actuator and plug stem do not move on demand, it could be due to the following reasons: * The actuator is blocked. Check the attachment and remove any blockage. Be careful, a blocked actuator or plug stem can suddenly start to move uncontrollably. Disconnect and lock the pneumatic air supply and control signal before unblocking. Release any stored energy in the actuator before unblocking. * The diaphragm in the actuator is defective. Please, refer to the associated actuator documentation for guidance. * The signal pressure is too low. Check the signal pressure and the signal pressure line for any leakage.
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jonesmichelleAug 23, 2025
Why doesn't the actuator and plug stem stroke through the entire range on my Samson Control Unit?
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  jamesmitchellAug 23, 2025
  If the actuator and plug stem do not stroke through the entire range, consider these potential causes: * The signal pressure may be too low. Inspect the signal pressure and check the signal pressure line for leaks. * The plug may have become detached. Fasten the plug and plug stem together. * The valve accessories might be set incorrectly. Verify the settings of the valve accessories.
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Scott BarronAug 29, 2025
What to do if there is increased flow through a closed Samson Control Unit valve?
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  Preston KnoxAug 29, 2025
  If you observe increased flow through a closed valve (seat leakage), the following could be the cause: * Dirt or other foreign particles may be deposited between the seat and plug. Shut off the pipeline section and flush the valve. * The valve trim, particularly with a soft seat, may be worn. Replace the plug or contact after-sales service.
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Elizabeth JonesSep 4, 2025
How to fix jolting movement of the actuator and plug stem in my Samson Control Unit?
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  johnsonlauraSep 4, 2025
  If you're experiencing jolting movement of the actuator and plug stem, and you have a version with adjustable packing, the packing might be tightened too far. To resolve this, tighten the packing correctly. Refer to the 'Adjusting the packing' information in the 'Installation' section under 'Testing the installed valve'.