Taylor-Wharton Microbulk Tanks - Manual (Page 24)

TW-407 Rev.-
22
Trouble Possible Cause Remedy
Low operating pres-
sure.
a Safety valve leaking or frozen open.
b Safety disc ruptured.
c Piping leaks to atmosphere.
d Pressure building / economizer regu-
lator malfunction.
e Excessive product withdrawal.
f Pressure building valve closed.
g Malfunctioning pressure gauge.
h Excessive frost on pressure building
coils.
a Thaw out valve or replace if neces-
sary.
b Replace disc.
c Leak test and repair piping.
d Adjust regulators. Replace if nec-
essary.
e Check for leaks downstream. Re-
duce product use.
f Open pressure building valve.
g Replace pressure gauge.
h Thaw pressure-building coils.
Excessive system
pressure.
a Extensive shutdown time.
b Low withdrawal rate.
c Malfunction of pressure-building cir-
cuit.
d Malfunction of pressure gauge.
e Bad vessel vacuum.
a No remedy.
b No remedy.
c Adjust pressure-building regula-
tors. Replace if necessary.
d Replace gauge.
e Perform NER test. Have vessel re-
paired and re-evacuated if necessary.
Leaking relief valve. a Dirt or ice in valve.
b Damaged valve seat.
a Thaw out valve. Replace if neces-
sary.
b Replace valve.
Ruptured pressure
vessel rupture disc.
a Excessive vessel pressure.
b Defective rupture disc.
c Atmosphere corrosion and/or disc
fatigue.
d Interior disc corrosion.
e Relief device failed.
a Excessive system pressure trouble
section. Replace rupture disc.
b Replace rupture disc.
c Replace rupture disc.
d Blow out safety device line. Re-
place rupture disc.
e Replace relief device and rupture
disc.
TROUBLE-REMEDY GUIDE