cashco P4 Installation, Operation & Maintenance Manual - Page 5

Browse online or download pdf Installation, Operation & Maintenance Manual for Industrial Equipment cashco P4. cashco P4 9 pages. Balanced pressure reducing regulator

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VII. TROUBLE SHOOTING GUIDE

1. Erratic operation; chattering.

Possible Causes

Oversized regulator; inadequate rangeability.

Worn poppet; inadequate guiding.

Weakened/broken poppet spring.

2. Regulator can't pass sufficient flow.

Possible Causes

Regulator undersized.

Incorrect range spring (adjusting aluminum knob CW does not

raise pressure to proper level).

Too much droop.

3. Sluggish operation.

Possible Causes

Fluid too viscous.

4. Excessive pressure downstream.

Possible Causes

Regulator not closing tightly.

Downstream block.

No pressure relief protection.

Restricted diaphragm movement.

IOM-P4

SECTION VII

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.

A5. Before replacing regulator, contact factory.

Replace trim ( possible body replacement).

Replace poppet spring. De ter mine if corrosion is causing the

failure.

A1. Confirm by opening bypass valve together with regulator.

A2. Check actual flow conditions, re-size regulator; if regulator has

inadequate capacity, replace with larger unit.

Replace range spring with proper higher range.

C1. Review droop expected.

C2. Contact factory.

Heat fluid. Contact factory.

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.

Check system; isolate (block) ﬂ ow at regulator inlet - not outlet.

Relocate regulator if necessary.

Install safety relief valve, or rupture disc.

Ensure no moisture in spring chamber at temperatures below

freeze point.

Remedies