Ulvac G-20DA - Page 24

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4.5 Start up procedures in cold climate
In winter-season, when operating the pump in cold environment or outdoor especially, it will
be difficult to start up the pump. It is called over-load operation because of high viscosity
of the pump oil at low temperature.
Warm up the pump oil, or repeatedly turn on and turn off the pump (several times on-off
operation) until motor starts rotation.
In the case of the pump stoppage after several second operating, continuous operating will
be possible by opening the pump vent valve. After warming up the pump, close the pump vent
valve, and operate normally.
4.6 Set up oil mist trap (option)
Oil mist trap OMT-050A for G-20DA, 25SA, 50DA, 50SA can be equipped for trapping oil mist out
of the pump. After eliminating the standard exhaust pipe, equip the oil mist trap to the exhaust
port. This can reduce oil mists and exhausting noise.
Read the instruction manual of OMT-050A in detail.
4.7 Restriction in an operation of the oil mist trap (option)
When using oil mist trap, the following items should be restricted in an operation.
When the filter clogged with oil, change the filter.
The maximum pressure inside this pump is 0.03MPa(GAUGE).
For pressure reading excess 0.03MPa(GAUGE) in exhaust port, change the filter.
Explosion hazard. Keep the operational restriction in setting the oil mist trap.
When the filter clogged with oil, change the filter.