Ulvac CRYOPUMP CRYO-U Series Instruction Manual page 66

Maintenance
S:Scheduled maintenance
Item
Cryopump
U 80K baffle
U 15K cryopanel replacement
U Cryopump cleaning
S Insulation properties of
heater for regeneration (*1)
S Pressure relief valve
U Calibration of cryometer
Refrigerator unit
S Seal kit replacement
S Driver assembly
Replacement
S Motor bearing replacement
S Cylinder bolt replacement
S Displacer replacement
U Valve body replacement
U Other parts replacement
Compressor unit
S Adsorber replacement
(*1):
Only applicable to a cryopump system with heater.
8-2
Table 8-1 Maintenance Parts and Intervals
U:Unscheduled maintenance or part replacement at fault
Parts
15K cryopanel
Heater
Pressure relief
valve
MBS-C
Cryometer
Seal kit
Driver bearing
Valve bearing
Set screw
Motor bearing
Cylinder bolt
st nd
1 /2 stage of
displacer
Intake/Exhaust
valve body
Other parts
Adsorber
ULVAC CRYOGENICS INCORPORATED
Interval
At fault
Every month
Once or twice
a month
At fault
R10 RM10
R10R
12,000h 16,000h
24,000h 16,000h
At fault At fault
At fault At fault
Refer to the compressor unit instruction manual.
Remarks
When reassembling,
always use new indium
gasket.
Replace when 10MΩ
or less
Check the safety of
pumped gas.
Use the (paid)
calibration service.
The maintenance
cycle depends on the
manner of operation.