Ulvac C30VR Series, Installation, Operation, Maintenance And Troubleshooting Instructions

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Section 2 Considerations before Installation
If the cooling water temperature is lower than 10°C, stop the water flow when the
compressor is suspended. If the cooling water of below 10°C is kept flowing, it may raise
viscosity of lubricant oil and the compressor may fail to startup when turned on.
CAUTION
Figure 2-3
Cooling water flow rate, water supply temperature, and water pressure
loss
(Except for C30PVRT)
0.2
0.17
0.1
0
(3) 0.04M Pa
0.02
0.15
0.05
0 5 10 15
32
30
20
15
10
5
(2) > 7 L/min
0
25
Temperature upper limit
Temperature lower limit
Water flow rate [L/min.]
Flow
rate
upper
limit
Operating water
temperature range
Flow rate lower limit
Allowable temperature
(See CAUTION above)
(1) When water temperature is at 30
℃
W
ate
r su
ppl
y temperature [
]
0 5 10 15
Water flow rate
℃
[L/min.]
Upper limit
Wa
te
r p
ress
ur
e loss
[MPa
0.02
Lower limit
]
ULVAC CRYOGENICS INCORPORATED 2-5