Cashco CA-2 - Manual (Page 5)

IOM-CA 5
A. Plugged spring chamber vent. A. Clean vent opening.
B. Fluid too viscous. B. Heat fl uid. Contact factory.
A. Normal-life diaphragm failure. A. Replace diaphragm.
B. Abnormal short-life diaphragm failure. 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. Upstream (inlet) pressure build-up occurring that overstresses
diaphragms. Re lo cate regulator or protect with safety relief
valve.
A. Regulator undersized. A1. Confi rm by opening bypass valve together with regulator.
A2. Check actual fl ow conditions, re-size regulator; if regulator has
inadequate capacity, replace with larger unit.
B. Incorrect range spring (screwing in CW B. Replace range spring with proper lower range. Contact factory
of adjusting screw does not allow
bringing pressure level up to proper
level.
C. Too much rise (build). C1. Review rise (build) expected.
C2. Contact factory.
A. Oversized regulator. A1. Check actual fl ow conditions, re-size regulator for minimum
and maximum fl ow.
A2. Increase fl ow rate.
A3. Decrease regulator pressure drop; decrease inlet pressure by
placing a throttling orifi ce in inlet piping union.
A4. Install next step higher range spring. Contact factory.
A5. Before replacing regulator, contact factory.
B. Worn plug. B. Replace regulator.
Remedies
2. Regulator inlet (upstream) too high:
3. Leakage through the spring chamber vent hole.
4. Sluggish operation.
Possible Causes
1. Erratic operation; chattering.
SECTION VII
VII. TROUBLE SHOOTING GUIDE
Possible Causes Remedies
Possible Causes Remedies
Possible Causes Remedies