cashco CA-2 Manual de instalación, uso y mantenimiento - Página 5

Navegue en línea o descargue pdf Manual de instalación, uso y mantenimiento para Equipamiento industrial cashco CA-2. cashco CA-2 10 páginas. Back pressure / relief regulators

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VII. TROUBLE SHOOTING GUIDE

1. Erratic operation; chattering.

Possible Causes

A. Oversized regulator.

B. Worn plug.

2. Regulator inlet (upstream) too high:

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 rise (build).

3. Leakage through the spring chamber vent hole.

Possible Causes

A. Normal-life diaphragm failure.

B. Abnormal short-life diaphragm failure. B1. Can be caused by excessive chattering. See No.1.

4. Sluggish operation.

Possible Causes

A. Plugged spring chamber vent.

B. Fluid too viscous.

IOM-CA

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. Contact factory.

A5. Before replacing regulator, contact factory.

B. Replace regulator.

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.

B. Replace range spring with proper lower range. Contact factory

C1. Review rise (build) expected.

C2. Contact factory.

A. Replace diaphragm.

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. Clean vent opening.

B. Heat fluid. Contact factory.

Remedies