Ulvac VD30C - The; Vacuum Pump Oil for Cold District

YK15-0009-DI-002-04
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WARNING
The guaranteed pressure resistance of this pump is 0.03 MPa (0.3
kg / cm2) (gauge pressure). Operate the supply pressure of the gas
ballast gas to be introduced within the following range.
Supply pressure: Atmospheric pressure to 0.03 MPa (0.3 kg / cm2
(gauge pressure)) or less.
4. 5 Vacuum Pump Oil For cold district
Starting the Pump operation might become difficult in winter season or in the cold district.
This is the overload phenomenon caused by increased viscosity of the Pump oil. To make sure,
you should confirm that the capacity of the motor overload protective device conforms to the motor
rated value, the Pump is not broken and the cable does not have abnormality. Then, warm up the
Pump oil or replace the oil with the Vacuum pump oil ULVOIL R-42 having lower viscosity.
Recommended type of oil:
(1) ULVOIL R-72 (standard oil)
(2) ULVOIL R-42 (For cold district in winter. In the case of ambient temperature 4~10℃)
IMPORTANT
① When temperature is low, and a pump does not run, warm up the Pump
oil or
turn the Pump on and off several times in short intervals.
② When the Pump
stops after run for several seconds, you try to move it while
putting slow leak in it, there is the thing that the Pump can run consecutively.
As the Pump
warmed, you close the slow leak valve, and please return it to
regular running.
CAUTION
① It is better to use the ULVOIL R-42
having less viscosity that enables you to
start rotating the Pump around 4℃.
You should, however, replace it with the ULVOIL R-72
if the temperature gets
10℃ or more. Be cautious as using the ULVOIL R-42 in war
m season would
cause such troubles as sealing error, oil leak or more serious trouble, due to
its lower viscosity.
③ ULVOIL R-42
is unfitted for high load operation. When performing the high
load operation, use ULVOIL R-72, and either warm the Pump
oil or perform
the Pump jog at several times, and start it up.