cashco SA5 Manual de instalação, operação e manutenção - Página 7
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VIII. TROUBLE SHOOTING GUIDE
When trouble shooting this regulator there are many possibilities as to what may be causing problems. Many
times, the regulator itself is not defective, but one or more of the accessories may be. Sometimes the pro cess
may be causing difficulties.
The key to efficient trouble shooting is information and communication. The customer should try to be as precise
as possible in their explanation of the problem, as well as their understanding of the application and operating
con di tions.
It is imperative the following information be provided by the customer:
Fluid (with fluid properties)
Range of flow rate
Range of inlet pressure
Range of outlet pressure
Range of fluid temperature
Range of ambient temperature
Pressure readings should be taken at every location that pressure plays a role - i.e., regulator inlet (as close as
possible to inlet port), regulator outlet (as close as possible to outlet port), etc.
Below are some of the more common complaints along with possible causes and remedies.
1.
Erratic regulation, instability or hunting.
Possible Causes
A. Sticking of internal parts
B. Oversized regulator
2.
Upstream pressure to high.
Possible Causes
A. Debris in trim preventing movement A.
B. Undersized regulator.
3.
Diaphragm continually breaks.
Possible Causes
A. Differential pressure across dia-
phragm may have exceeded limits.
(See Tech Bulletin).
IOM-CA5/SA5
SECTION VIII
A.
Remove internals, clean, and if necessary, replace.
B.
Check actual flow conditions; resize regulator for min i mum
and maximum flow; if necessary, replace with smaller
regulator.
Clean unit of debris
B.
Check actual flow conditions; resize regulator for minimum
and maximum flow; if necessary, replace with larger regulator.
A.
Reference limits as recorded in technical bulletin as well as
where the various pressures are acting.
Remedies
Remedies
Remedies
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