Taylor-Wharton M2000, Руководство по эксплуатации и техническому обслуживанию

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MB2000/3000/5000 OPERATING AND MAINTENANCE MANUAL
TAYLOR-WHARTON (BEIJING) CRYOGENIC EQUIPMENT CO., LTD.
20
TROUBLE-REMEDY GUIDE
TROUBLE POSSIBLE CAUSES REMEDY
l
．
Tank Pressure too low
a
．
Tank Pressure Relief Valve leaking
or frozen open
b
．
Tank Rupture Disc rupture
c
．
Piping leaks to atmosphere
d
．
Low liquid level
e
．
Excessive product withdrawal
f
．
Improper filling procedure
Thaw out valve or replace if necessary, Refer to this section.
Replace Tank Rupture Disc. Refer to this section.
Test and repair tank
Refill tank
Install higher capacity Pressure Building Coil.
Refer to filling instruction in Operation Section.
2.
Excessive tank
pressure
a
．
Extensive shutdown time No Remedy
b
．
Low withdrawal rate No Remedy
c
．
Malfunction of Pressure Building
Regulator
Refer to this section
d
．
Malfunction of tank Pressure Gauge
e
．
Inner Vessel. Lack of refrigeration
caused by low liquid level
f
．
Malfunction of economizer regulator
Replace Pressure Gauge,
Inner Vessel. Refill tank
Refer to this section
3.
Erratic or erroneous
Liquid Level Gauge
readings
a
．
Leaking gauge lines
b
．
By-pass valve open
c
．
Liquid Level Gauge needle stuck
d
．
Liquid Level Gauge needle not
zero adjusted
e
．
Gauge line reversed
f
．
Liquid Level Gauge damaged or
faulty
g
．
Plugged gauge lines
Test and repair leaks.
Close by-pass valve
Tap Liquid Level Gauge slightly, Inspect needle and bend
as required
Adjust as required
Connect properly
Replace Liquid Level Gauge
Disconnect lines at Liquid Level Gauge and test for flow
4
．
Leaking safety valve
a
．
Dirt or ice under valve or disc
b
．
Improper valve set point
c
．
Damaged valve seat or disc
Thaw out valve, Replace if necessary
Replace valve
Replace valve
5.
Ruptured Pressure
Vessel Rupture Disc.
a
．
Excessive tank pressure
b
．
Defective Rupture Disc
c
．
Atmosphere corrosion and/or disc
fatigue.
d
．
Interior disc corrosion
e. Improper Rupture Disc
Refer to this section.
Replace Rupture Disc
Replace Rupture Disc,
Blow out safety device line. Replace Rupture Disc
Install correct Rupture Disc
6
．
Tank vacuum leak
a
．
Leak in Vacuum Jacket bursting
disc.
b
．
Vacuum Pump Out Valve leak
c
．
Vacuum Probe or Vacuum Probe
Isolation Valve leak
Refer to Analyzing Vacuum Deterioration section. Replace Vacuum
bursting disc .
Replace Vacuum Pump Out Valve diaphragm. Re-evacuate
insulation space. Contact the factory for re-evacuation procedures
Replace faulty component. Re-evacuate insulation space. Contact
the factory for re-evacuation procedures