Cashco P5 - Manual (Page 5)

IOM-P5 5
SECTION VII
VII. TROUBLE SHOOTING GUIDE
2. Regulator can not pass suffi cient fl ow.
1. Erratic operation; chattering.
4. Excessive pressure downstream.
3. Sluggish operation.
Possible Causes Remedies
A. Oversized regulator; inadequate rangeability. 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.
A5. Before replacing regulator, contact factory.
B. Worn poppet; inadequate guiding. B. Replace trim (possible body replacement).
C. Weakened/broken poppet spring. C. Replace poppet spring. Determine if corrosion is causing the failure.
Possible Causes Remedies
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. Too much droop. B1. Review droop expected.
B2. Contact factory.
Possible Causes Remedies
A. Fluid too viscous. A. Heat fl uid. Contact factory.
Possible Causes Remedies
A. Regulator not closing tightly. 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. Downstream block.. B. Check system; isolate (block) fl ow at regulator inlet - not outlet. Relocate regulator if
necessary.
C. No pressure relief protection. C. Install safety relief valve, or rupture disc.
D. Restricted piston movement. D. Ensure no moisture in spring chamber at temperatures below freeze point.