- 7 -
5. Lubrication
5.1 Oil lubrication
The pump is despatched, normally, with full oil reservoirs, but the oil level
should be checked as a precaution. The reservoir is full when the oil reaches
the top of the gauge.
An oil level switch is normally fitted for the fresh oil reservoir. It automatically
switches off the vacuum pump when the minimum oil level is reached. The
vacuum pump can be started again once the reservoir has been filled to the
top of the gauge.
If an auxiliary oil reservoir is fitted, the appropriate gauge on the auxiliary
reservoir should be checked.
We recommend the following oil brands: Bechem VBL 100, BP Energol RC
100, Esso rotary oil 100, Mobil vacuum pump oil heavy, Shell Tellus oil C 100
or Aral Motanol HK 100. Other lubricants may only be used after consulting
the supplier.
Old and used oil must be disposed of corresponding with the
relevant health, safety and environmental laws.
If the oil brand is changed. The old oil must be drained completely from
the tank and the oil cooler.
5.2 Oil metering Pump
The oil metering pump is set to necessary output at the factory.
This rate can only be changed on request to our Company.
This rate can only be changed on request to our Company by turning the
regulating screw. The capacity will be changed about
1
/
3
per revolution.
Reduce oil counter-clockwise, increase oil clockwise.
Oil must be pumped into the pipes by the crank (about 150 to 200
revolutions) at first start-up, after a stoppage of more than 1 week,
after exchange of stages, after cleaning of the oil pump and after work on the oil pipes.
Oil Consumption for VLV:
l/hr
Oil Consumption for VLV + Roots booster on request
VLV
25-2
25-3
40-2
40-3
60-2
60-3
80-2
80-3
100-2
100-3
50 Hz
0.065
0.097
0.065
0.097
0.065
0.195
0.065
0.195
0.065
0.195
60 Hz
0.078
0.117
0.078
0.117
0.078
0.234
0.078
0.234
0.078
0.234
6. Maintenance
When maintaining these units and having such situations where personnel could be hurt by moving parts or by live
electrical parts the pump must be isolated by totally disconnecting the electrical supply. It is imperative that the unit
cannot be re-started during the maintenance operation.
Do not maintain a pump that is at its normal operating temperature as there is a danger from hot parts or hot lubricant.
Hazardous substances must be removed before serving. Maintenance personnel should be informed regarding the
presence of anything harmful and also be informed about all relevant safety regulations before carrying out any work.
6.1 Oil lubricating pump
Special maintenance of the oil lubricating pump is not necessary during operation. Please ensure that there is always sufficient
fresh oil in the reservoir to prevent air being pumped into the pipes. Should this occur, pipes which deliver against pressure should
be released at the lubricating point and should not be reconnected until the discharged oil is free from air bubbles. Petrol or
petroleum products must be pumped through the lubricating pump at least once a year, and the pipes must be cleaned. The fresh
oil reservoir must also be flushed out. The lubricating pump should be cleaned if it is not used immediately after delivery or has
not run for several months (see storage procedure on page 7). Oil residues in the ports may have solidified and adversely affect
operation of the pump.
Reduction of oil
Increase of oil
Oil metering pump
