3 Product description
3.1 Function
The operating principle of the
HiLobe
roots pump is based on 2 synchronous pistons that rotate in a
housing without touching. The pumping effect is produced as a result of the opposing rotation of 2 fig-
ure-of-eight shaped roots pistons. While suction chambers are formed between the rolling pistons and
the housing, the rolling pistons continuously form a mutual seal without touching each other or the hous-
ing. A pair of gears positioned on the extended shaft ends, causes the opposing, synchronous running
of the roots pistons. Lubrication is limited to the two bearing and gear chambers which are arranged
separately from the suction chambers.
and see how Pfeiffer Vacuum roots pumps work.
1
3
4
5
2
6
11
12
7
8
9
10
13
14
Fig. 3:
Design, construction
1 Vacuum flange with flange cover
8
Drain screw
2 Reinforcing flange
9
Sight glass, fixed bearing side
3 Measurement connection on vacuum side
(both ends)
10
Cooling water connection, fixed bearing side
4 Filler screw
11
Measurement connection on fore-vacuum side
(both ends)
5 Motor power supply plug
12
Cooling water connection, floating bearing side
6 Cooling water connection, motor
13
Sight glass, floating bearing side
7 Fore-vacuum flange
14
Filler screw
Product description
19/68
