cashco 2171 Kurulum, Çalıştırma ve Bakım Kılavuzu - Sayfa 5
Kontrolör cashco 2171 için çevrimiçi göz atın veya pdf Kurulum, Çalıştırma ve Bakım Kılavuzu indirin. cashco 2171 8 sayfaları. Back pressure / relief regulators
Sayfayı Yazdır
VII. TROUBLE SHOOTING GUIDE
1. Erratic operation; chattering.
Possible Causes
A. Oversized regulator.
B. Worn piston; inadequate guiding.
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.
4. Sluggish operation.
Possible Causes
A. Plugged spring chamber vent.
B. Fluid too viscous.
IOM-1171/2171
SECTION VII
Remedies
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.
Remedies
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.
B.2 Contact factory.
C1. Review rise (build) expected.
C2. Contact factory.
Remedies
A1. Replace diaphragm.
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, ensure not subjecting to over
temperature conditions.
B4. Upstream (inlet) pressure build-up occurring that overstresses
diaphragms.
Relocate regulator or protect with safety relief
valve.
Remedies
A.
Clean vent opening.
B. Heat fluid. Contact factory.
5