ESS7/EST4/ESL4/ELC4
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SECTION 3
TROUBLESHOOTING
CAUSES
POSSIBLE CORRECTIVE ACTIONS
1. No gas flows through the Regulator and the High Pressure Gauge does not
indicate pressure (or if no High Pressure Gauge is present).
a. Inlet or Inlet Filter is plugged.
Blow 40-45 PSIG of air through the Filter in
reverse direction of the normal gas flow.
b. Empty Supply Cylinder.
Replace the Cylinder.
2. No gas flows through the Regulator and the High Pressure Gauge does indicate
pressure (or if no High Pressure Gauge is present).
a. Damaged Adjusting Mechanism or
missing components.
Check the Drive Screw, Guide Bushing and
Thrust Washer – insure they are installed
correctly and moving freely in the Bonnet.
b. Adjusting Knob not installed
correctly.
Make sure the square of the Drive Screw is
properly mated into the square in the
Adjusting Knob.
c. Outlet Connection plugged.
Inspect and clear the Outlet Connection of
any debris.
d. Broken Adjusting Spring.
Replace the Adjusting Spring.
e. Broken Seat Stem.
Replace the Seat Assembly.
3. Gauge(s) do not indicate pressure but gas flows through the Regulator.
a. Defective Gauge(s).
Replace Gauge(s).
4.
Regulator does not deliver in its designed delivery pressure range.
a. Incorrect Adjusting Spring used
during repair.
Replace with correct Adjusting Spring.
b. Damaged Adjusting Mechanism or
missing components.
Check the Drive Screw, Guide Bushing and
Thrust Washer – insure they are installed
correctly and moving freely in the Bonnet.
5. Regulator hums or clatters while flowing.
a. Missing Friction Damper.
Install a Friction Damper.
b. Missing Bottom Guide.
Install the Bottom Guide.
c. Flow exceeds Regulator capacity.
Reduce flow to below the maximum rating of
the Regulator.
d. Restriction upstream of the
Regulator.
Inspect system and remove restriction.
