MAN205-0195042EN Rev. A Aug. 2011
Page 28 of 137 pages
3.5 The Vacuum Pump and the Heat Exchanger
For the generation of vacuum in the air removal and dry stages, the autoclave is
equipped with a water ring seal vacuum pump – Speck V 55, suitable for continuous
operation, and for achieving high vacuum.
The tap water necessary for the operation of the pump is supplied by the water
reservoir, connected to the tap water source.
The water level in the reservoir is maintained by a mechanical float valve.
A float switch mounted on the lower side of the reservoir prevents the pump running in
case of low water level in the reservoir.
A condenser (heat exchanger) is mounted on the vacuum pump inlet piping, to cool
down the steam exhaust from chamber before getting inside the pump, using tap water
as a cooling fluid.
Two important goals are achieved by this action:
1. It reduces the temperature of the fluids flowing through the pump;
therefore the scaling of parts is eliminated.
2. The efficiency of the vacuum pump is greatly improved through the
transformation of steam into condensate, resulting in a dramatic
increase of the vacuum generation speed.
The quality of tap water is very important for maintaining the vacuum pump and the
autoclave in good condition and prolonging the life duration of the machine. Refer to the
Water Quality paragraph.
Note:
After servicing the vacuum pump, make sure to reconnect the earth connection.
Vacuum pump Speck V 30/55
UL= connection for ventilation valve UV=connection for drainage valve
UB= connection for operation liquid Ue=drainage (screwed plug)
Note:
Before operating the vacuum pump for the first time, make sure that the pump is
free and you can turn the main axle with a screw driver without force.
Verify that the pump motor turns in the right direction.
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