Taylor-Wharton EF-450 - Manual (Page 22)

Trouble-Remedy Guide
Trouble Possible Cause Remedy
a. Safety valve leaking or frozen
open.
a. Thaw out valve or replace if
necessary.
b. Safety disc ruptured. b. Replace disc.
c. Piping leaks to atmosphere. c. Leak test and repair piping.
d. Pressure building / economizer
regulator malfunction.
d. Adjust regulators. Replace if
necessary.
e. Excessive product withdrawal. e. Check for leaks downstream.
Reduce product use.
f. Pressure building valve closed. f. Open pressure building valve.
g. Malfunctioning pressure gauge. g. Replace pressure gauge.
1. Low operating pressure.
h. Excessive frost on pressure
building coils.
h. Thaw pressure building coils.
a. Extensive shutdown time. a. No remedy.
b. Low withdrawal rate. b. No remedy.
c. Malfunction of pressure
building circuit.
c. Adjust pressure building
regulators. Replace if necessary.
d. Malfunction of pressure gauge. d. Replace gauge.
2. Excessive system pressure.
e. Bad vessel vacuum. e. Perform NER test. Have vessel
repaired and re-evacuated if
necessary.
a. Dirt or ice in valve. a. Thaw out valve. Replace if
necessary.
3. Leaking relief valve.
b. Damaged valve seat. b. Replace valve.
a. Excessive vessel pressure. a. Refer to Step 2, this section.
Replace rupture disc.
b. Defective rupture disc. b. Replace rupture disc.
c. Atmosphere corrosion and/or
disc fatigue. c. Replace rupture disc.
d. Interior disc corrosion. d. Blow out safety device line.
Replace rupture disc.
4. Ruptured pressure vessel rupture
disc.
e. Relief device failed. e. Replace relief device and rupture
disc.
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