Pfeiffer Vacuum DUO 11 ATEX, Руководство по эксплуатации

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3.2 Operating principle
1
3
4
5
6
2
Fig. 3: Rotary vane vacuum pump functional principle
1 Housing 4 Vane
2 Vacuum flange (inlet) 5 Suction chamber
3 Rotor 6 Exhaust (outlet)
The rotary vane pump is an oil-sealed rotary displacement pump. The pumping system is made up of
the housing, the eccentrically mounted rotor, and the centrifugally- and spring-loaded radially sliding
vanes, which divide the suction chamber into multiple chambers. The volume of each chamber changes
periodically as the rotor rotates. This provides suction of the gas at the vacuum flange, which thereby
continues to be compressed in the suction chamber via rotation of the rotor until the exhaust valve
opens and the gas is discharged against atmospheric pressure.
Gas ballast valve
The gas ballast device is used to blend inert gas with the process gas in the pumping system. An in-
crease in the proportion of inert gas prevents condensation in the suction chamber as the required gas/
vapor mixture is compacted within certain limits and discharged.
Operating fluid, oil
The pump oil, also known as operating fluid, fulfills various tasks in a rotary vane pump:
● lubrication of all moving parts
● filling part of the dead volume under the exhaust valve
● sealing the gap between the intake and exhaust channel, and between the vanes and the working
chamber
● ensuring an optimal temperature balance through heat transfer
3.3 Scope of delivery
● Rotary vane vacuum pump with motor
● Operating fluid
● Cone sieve with centering ring and O-ring for both connection flanges
● Blank flange for both connection flanges
● Stainless steel circlips
● Connecting elements for inert gas (separate package)
● Documentation
● Optional accessories
3.4 Identifying the product
► To ensure clear identification of the product when communicating with Pfeiffer Vacuum, always
keep all of the information on the rating plate to hand.
► Observe the motor-specific data on the motor rating plate attached separately.
► Learn about certifications through test seals on the product or at
www.tuvdotcom.com with com-
pany ID no. 000021320 .
Product description
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