Elmo Rietschle R-VWP 500/1000/1500/2500 - Manual (Page 15)

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Set up and operation
B
A
B
C
A High-vacuum connection
B Pre-Vacuum connection
Fig. 5 Rotary lobe vacuum pump R-VWP
C Unloading valve
4.3 Areas of application
The contact-less operating Roots vacuum pumps R-VWP are primarily used for producing coarse and fi ne
vacuum and for handling gasses and vapours.
They can tolerate water vapour and most corrosive vapours. Contamination that could be drawn in such as
dust and liquid can not build up in the conveyor chamber even after shutdown because the direction of fl ow
is from the top to the bottom of the units.
Roots boosters are normally used in combination with backing pumps.
The vacuum capacities at atmosphere are 485, 1072, 1580 und 2293 m 3 /hr operating on 50 cycles. The
pumping curves which show max. compression ratio against pre-vacuum, can be found in data sheets D 200
and D 201.
If the unit is switched on more frequently (at regu-
lar intervals of about 10 times per hour or at higher
ambient temperatures and intake temperatures, the
excess temperature limit of the motor winding and
the bearings may be exceeded.Please contact the
manufacturer should the unit be used under such
conditions.
If it is installed in the open air the unit must be pro-
tected from environmental infl uences, (e.g. by a pro-
tective roof).