cashco PL1 Instrukcja instalacji, obsługi i konserwacji - Strona 6
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VIII. TROUBLE SHOOTING GUIDE
1. Erratic operation; chattering.
Possible Causes
A.
Oversized regulator; inadequate rangeability.
B.
Worn o-ring; inadequate guiding.
2. Regulator can't pass sufficient flow.
Possible Causes
A.
Regulator undersized.
B. Incorrect range spring (screwing in CW of adjusting
screw does not allow bringing pressure level up to
proper level).
C.
Too much droop.
3. Leakage through the spring chamber vent hole.
Possible Causes
A.
Normal-life diaphragm failure.
B.
Abnormal short-life diaphragm failure.
C. O-ring failure.
4. Sluggish operation.
Possible Causes
A.
Fluid too viscous.
5. Excessive pressure downstream.
Possible Causes
A.
Regulator not closing tightly.
B.
Downstream block.
C.
No pressure relief protection.
D.
Restricted diaphragm movement.
6
SECTION VIII
A1. Check actual flow conditions, re-size regulator for minimum and maximum
flow.
A2. Increase flow rate.
A3. Decrease regulator pressure drop; decrease inlet pressure by placing a
throttling orifice in inlet piping union.
A4. Install next step higher range spring. Contact factory.
A5. Before replacing regulator, contact factory.
B.
Replace stabilizing o-ring (13).
A1. Confirm by opening bypass valve together with regulator.
A2. Check actual flow conditions, re-size regulator; if regulator has inadequate
capacity, consult factory.
B.
Replace range spring with proper higher range. Contact factory.
C1. Review droop expected.
C2. Contact factory.
A.
Replace diaphragm.
B1. Can be caused by excessive chattering. See No. 1. to remedy chatter.
B2. Can be caused by corrosive action. Consider alternate diaphragm material.
B3. For composition diaphragms, assure not subjecting to over-temperature
conditions.
B4. Downstream (outlet) pressure buildup occurring that overstresses
diaphragms. Relocate regulator or protect with safety relief valve.
C.
Replace O-ring (18), apply appropriate torque.
A. Heat fluid. Contact factory.
A. Inspect the seating. Clean and lap metal seat surfaces; replace if lapping
does not remedy. If composition seats are depressed, nicked or embedded
with debris, replace trim.
B. Check system; isolate (block) flow at regulator inlet - not outlet. Relocate
regulator if necessary.
C. Install safety relief valve, or rupture disc.
D. Assure no moisture in spring chamber at temperatures below freeze point.
Assure no dust or debris entering vent opening. If rainwater or debris can
enter, re-orient regulator.
Remedies
Remedies
Remedies
Remedies
Remedies
IOM-PA1-PL1