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5) When the pump is kept running for several hours, the oil temperature in
the case will be rise to about 70
℃
at a room temperature of 20
℃
. If the oil
temperature exceed 70
℃
when the gas ballast valve is kept closed, some
trouble might be suspected. Please stop the pump and contact ULVAC or
ULVAC's distributor at once.
6) If the pump does not start rotating, the pump cylinder might be filled with
oil. Open the leak valve to attempt to correct this problem.
8.2 Pump stop
1
）
Close vacuum valve [A].
2
）
Stop the motor and vent the pump. Open the leak-valve [B].
Note: Make sure the leak valve is opened when the pump is stopped or, in
the cage of a power failure, prevent the pump and vacuum system from
flooding with oil.
Note: Oil circulation
Pump oil will be introduced into the filter case through the
oil-feeding solenoid valve.
1) PKS-016 oil-flow check.
Remove the filter body cap, Observe the oil-flow [See Fig.4]
2) PKS-030 or PKS-070 oil-flow check.
Observe the oil filter window. [See Fig. 5
〜
6]
Note: Cooling water connection
1) The PKS-016 pump is air-cooled.
2) The PKS-030 or PKS-070 pump is water-cooled, so you must connect
the pump to a water supply. (Ref. Fig. 3)
