Cashco 31-N User Manual
Page 9

IOM-31-N
9
Possible Cause
Remedy
A.
Diaphragm failure.
A.
Replace diaphragm.
B.
Downstream over-pressurization.
B1.
B2.
B3.
B4.
B5.
Correct process conditions/controls that cause P
2
pressure
to become greater than 50 psig (3.45 Barg).
Install safety relief valve or rupture disc with a 50 psig
(3.45 Barg) setting or lower.
Disassemble actuator assembly and check for bent
upper diaphragm plate. Check for relief cap distortion.
Flow is tightly shutoff downstream of regulator;
relocate shutoff valve.
Seat leakage; replace seat.
C.
Body gasket failure.
C1. Replace body gasket.
2. External
leakage.
Possible Cause
Remedy
A.
Closing cap removed.
A.
Reinstall gasketed closing cap.
B.
Plug vent.
B.
Clean vent opening in spring chamber.
3. Unstable
Operation.
See also other documents in the category Cashco Sensors:
- 8310HP (8 pages)
- 8310HP - Differential (1 page)
- 5300P Air Filter Regulator (2 pages)
- D (8 pages)
- 1000 HP Differential (16 pages)
- HP (8 pages)
- HP-1+6+S (8 pages)
- POSR-2 (20 pages)
- 1465 (8 pages)
- 4381 (8 pages)
- DA1 (16 pages)
- DA2 - Positive Differential (16 pages)
- DA3 (16 pages)
- DA0 (12 pages)
- DAP (12 pages)
- P3 (8 pages)
- P7 (9 pages)
- P2 (8 pages)
- P4 (8 pages)
- P5 (8 pages)
- PBE-L Pressure Build Economizer (8 pages)
- MPRV-H Pressure Reducing Regulator (8 pages)
- 1000 HP Basic (12 pages)
- 1000 Cryogenic (12 pages)
- 345 (8 pages)
- POSR-1 (12 pages)
- 1000 LP (12 pages)
- P1 (8 pages)
- PBE-H Pressure Build Economizer (8 pages)
- PBE Pressure Build Economizer (8 pages)
- MPRV-L Pressure Reducing Regulator (8 pages)
- PGR-1 (16 pages)
- C-PRV (8 pages)
- C-CS (8 pages)
- 5381 (8 pages)
- SAP (12 pages)
- CA1 (12 pages)
- CA4 (12 pages)
- 8311HP (8 pages)
- 1171 (8 pages)
- 6987 (8 pages)
- 123 (8 pages)
- 123-1+6+S (8 pages)
- CA-1 (8 pages)