2 | Product Description
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0870567093_NC0630C_ACV_A0002_IM_en
NOTE
Technical term.
In this instruction manual, we consider that the term ‘machine’ refers to the ‘vacuum
pump’.
2.1 Operating Principle
The machine works on the one-stage, twin-screw pump principle.
Two screw rotors are rotating inside the cylinder. The pumping medium is trapped
between the individual screw coils, compressed and transported to the gas discharge.
During the compression process, the two screw rotors do not come into contact with
each other nor with the cylinder. There is no need for a lubrication or an operating fluid
in the process chamber.
2.2 Application
The machine is intended for the suction of air and other dry, non-aggressive, non-toxic
and non-explosive gases.
Conveying of other media leads to an increased thermal and/or mechanical load on the
machine and is permissible only after a consultation with Busch.
The machine is intended for the placement in a non-potentially explosive environment.
The machine is capable of maintaining ultimate pressure, see
Technical Data [
►
34]
.
The machine is suitable for continuous operation.
Permitted environmental conditions, see
Technical Data [
►
34]
.
2.3 Standard Features
2.3.1 Air Cooling
The machine is cooled by a cooling liquid circuit in the cylinder cover and cylinder.
The cooling liquid pump (CLP) allows a recirculating flow in the cooling liquid chamber.
The cooling liquid is cooled by an air-water heat exchanger (AHE).
A motor driven fan, integrated to the heat exchanger, allows the cooling air to be drawn
through the heat exchanger. See
Electrical Connection of the Heat Exchanger Fan Mo-
tor [
►
19]
.
2.3.2 Temperature Switch
The temperature switch monitors the oil temperature of the machine.
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