12 | Baker Hughes
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Troubleshooting
Problem
Likely Cause
Fails Shutoff Test (leaks from upstream
to downstream piping)
Damaged Plug Seal
Damaged Seat
Damaged Seat O-Ring
Damaged Body Seal
Porosity in Body Casting
Damaged sealing surface
Service conditions too cold for plug
seal
Fails External Leakage Test
Damaged Spring Cover O-ring
Damaged Body Seal
Damaged Sensing Diaphragm
Damaged Flowgrid Diaphragm
Damaged Upper Seal Plate O-ring
Damaged sealing surface
Damaged Sense Port Adapter O-ring
Fails External Leakage Test out of
Bleed Assembly
Damaged Bleed Cap O-ring
Damaged Bleed Stem O-ring
Damaged Sealing Surface
Vents gas out of Slam Shut Actuator
Body Vent Port
Damaged Sensing Diaphragm
Rubber damaged on diaphragm
assembly nut
Nut on diaphragm assembly not
properly tightened
Damaged Sealing Surface
Fails to Reset
Damaged Main Shaft external threads
Reset Shaft not properly tightened onto
Main Shaft
Main Shaft not properly tightened onto
Plug
Reset Pin missing
Rotator Shaft excessively worn or
damaged
Fails to Trip Closed
Rotator Shaft damaged
Excessive internal icing
