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4.3
Leak Test the system
After you have installed the pump, leak test the system and seal any leaks found.
The level of leak tightness required will depend on the application of the system. You must
leak test the system to ensure the integrity of the system and its vacuum seal.
4.4
How to Stop the Pump
(1) Close the valve 1. As for valve 2 shut, valve 3 are open then.
(2) Switch off the heater of the pump.
(3) Because the rank oil continues jetting it for 20 to 30 minutes after having off the heater,
please keep the same state.
(4) Close valve 3 about from 30 to 60 later and stop an oil rotary vacuum pump.
(5) Leak the oil rotary vacuum pump side at a leak valve.
(6) Stop the cooling water.
One hour or more, please continue draining a coolant after a pump stop by all means.
5.
Maintenance and Inspections
5.1
Regular inspections
Maintenance and the check depend on use frequency and the application of this pump.
More frequent maintenance may be required if the pump has been used to process corrosive
or abrasive gases and vapors. If necessary, adjust the maintenance plan according to your
experience.
Check the pump fluid level
Inspect the pump fluid
Clean the cooling pipe
Clean the pump
Renew a heater
Check the heater terminal nuts
5.2
Renew of heater
The heater of diffusion ejector pump are three kinds and it is pipe heater, wire heater and
cartridge heater. If any trouble is caused from the heater, the heater assembly is easily
removed from the pump and the heater is easily cleaned or replaced.
This procedure will be done as follows:
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