Advertisement
CAUSES
6.
Regulator experiences excessive drop.
a. Friction Damper too tight.
b. Wrong size orifice in Test Gun.
c. Partially plugged Inlet Filter.
d. Incorrect Adjusting Spring used
during repair.
e. Low Cylinder pressure or Manifold
test pressure.
f.
Flow exceeds Regulator capacity.
7.
Increase in the Low Pressure Gauge reading (creep).
a. Loose Nozzle.
b. Missing or damaged Nozzle O-
Ring.
c. Accumulation of foreign particles
on Seat Assembly or seating
surfaces.
8.
With the cylinder valve closed, the High Pressure Gauge indicator drops, and
there is no immediate increase in pressure indicated on the Low Pressure
Gauge.
a. Loose connection – Regulator to
Test Manifold.
b. Loose connection – Inlet Swivel to
Regulator Body.
c. Loose connection – High Pressure
Gauge to Regulator Body.
d. Leaking Gauge.
9.
Low Pressure Gauge indicator slowly drops, and there is no decrease in
pressure on the High Pressure Gauge when the Manifold Valve is closed.
a. Test Gun is not attached securely.
b. Loose connections at the Regulator
Body – Outlet Connection, L.P.
Gauge or Relief Valve/Plugs
c. Loose connection – Bonnet to
Body.
d. Damaged Diaphragm.
ESS7/EST4/ESL4/ELC4
POSSIBLE CORRECTIVE ACTIONS
Replace the Friction Damper and/or Gland.
Insure the correct orifice is installed in the
Test Gun - size #52 (.0635").
Clean or replace the Inlet Filter.
Replace with correct Adjusting Spring.
Check Cylinder and Manifold pressure and
adjust/replace as needed.
Reduce flow to below the maximum rating of
the Regulator.
Tighten Nozzle to 20 ft-lbs torque.
Inspect and install or replace O-Ring as
necessary.
Clean seating surfaces and/or replace Seat
Assembly.
Insure Regulator is securely tightened to the
Manifold.
Tighten the Swivel using 20 ft-lbs torque.
Tighten the High Pressure Gauge using 10 ft-
lbs torque minimum.
Replace the Gauge.
Tighten the Test Gun.
Tighten connections using 15 ft-lbs torque
minimum.
Tighten Bonnet Screws using 12-15 ft-lbs.
Follow the sequence shown in STEP 19
FIGURE 1 of the Assembly Procedure.
Replace Diaphragm Assembly.
- 28 -
SECTION 3
Advertisement
