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GFH45-IOM Rev. 0 12/18 Printed in USA
TROUBLESHOOTING GUIDE
Symptom
: Outlet pressure continues to rise after flow
ceases.
Potential Cause
: Valve seat leakage
Repair
: Disassemble and clean regulator
components. Install new valve plug and filter element
(if applicable). Reassemble.
Symptom
: External leakage
Potential Cause
: Diaphragm to body joint seal
leakage.
Repair:
Disassemble. Inspect regulator body where
diaphragm seals. Replace diaphragm assembly.
Potential Cause
: Bowl to body joint leakage.
Repair:
Disassemble. Inspect regulator body where
bowl o-ring contacts. Inspect bowl where o-ring
contacts. Replace o-ring.
Symptom
: External leakage
Potential Cause
: Draincock leakage.
Repair:
Tighten draincock by turning handle
clockwise.
Symptom
: Outlet pressure cannot be adjusted to
maximum control range.
Potential Causes:
1. Control knob positive stop adjustment.
2. Flow induced droop.
Repair:
1. Adjust positive stop of control knob.
2. A higher output range regulator may be required.
Symptom:
Noisy operation.
Potential Causes:
Turbulence in adjacent piping.
Repair:
Insure that there are no elbows, line tees or
other turbulence creating piping directly upstream or
downstream of the pressure regulator.
