Rotation speed.
Once the needed vacuum rate has been reached, we recommend reducing the vacuum pump
speed to its working speed (see paragraph “Usage limitations”): this allows keeping the achieved
vacuum/pressure rate constant. The pump speed can also be reduced to values lower than the working
speed during the tank discharging phase (with the 4-way valve in pressure mode) without increasing the
draining time. Thus, exhaust temperature is reduced, vane durability is increased and both oil consumption
and power absorption are reduced.
Before starting any maintenance operation, follow the safety prescriptions as described in
paragraph “Safety and accidents prevention”.
Pump operation condition CHECKING FREQUENCY
Lubrication: dripping into oilers D
Rotating speed D
Operating
Working pressure D
Side mounted tank oil level D
Empty the oil gathered in the exhaust silencer. D
Check vanes wear W
Clean filter and vacuum line shutoff W
Check pressure relief valve condition M
Gear box oil level M
Venting of the pump water cooling circuit M
Standstill
Gear box oil change 1500 h
Frequency: D: daily W: weekly M: monthly
Check dripping into the oilers.
Be sure it is regular (app. 40 drops/min at max. speed) to grant a correct lubrication of the pump. At lower
speeds, the number of drops must be directly proportional.
If the pump is run without lubrication, the internal components may quickly damaged due to
overheating. Stop the vacuum pump and check the oil level and the lubricating pump.
Do not use the exhausted oil gathered on the bottom of the exhaust silencer again.
Dispose of the oil as provided by current specifications.
8. ORDINARY MAINTENANCE
CHECKING THE DRIP OILERS
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