3 Product description
3.1 Function
The rotary vane pumps of the HenaLine are single-stage, oil-sealed rotary positive displacement pumps
with air cooling and circulatory lubrication. A non-return valve in the vacuum connection closes the in-
take line automatically when the rotary vane pump is switched off and prevents an operating fluid return
flow. The integrated oil mist filter cleans the conveyed gas and prevents the operating fluid mist from
being emitted at the exhaust. The operating fluid collected in the separator is supplied back to the rotary
vane pump. A filter is also installed on the operating fluid separator for cleaning the operating fluid.
Fig. 3:
Operating principle
The rotary vane pump requires operating fluid for sealing the gap, for lubrication and for cooling. The
operating fluid reservoir is on the pressure side of the vacuum pump on the floor of the operating fluid
separator. The pressure differential between the pressure side and suction side automatically causes
operating fluid to be sucked in over the supply lines from the operating fluid separator and injected into
the pumping system. The incoming operating fluid, together with the incoming gas, is pumped through
the rotary vane pump and exhausted into the operating fluid separator as oil mist. Operating fluid that is
separated at the exhaust filters collects in the upper part of the operating fluid separator and is returned
via an operating fluid return line directly to the intake side. The rotary vane pump is cooled by heat radi-
ation from the surface of the vacuum pump, the air flow of the two fans and the pumped gas.
Product description
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