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Operating Instructions
Vacuum pumps
E
Pump ranges
These operating instructions concern the following oil flooded rotary vane vacuum pumps:
VGA (ultimate vacuum 20 mbar, abs.)
VGC (ultimate vacuum 2 mbar, abs.)
The vacuum capacities at atmosphere are 4, 6, 10, 15 and 20 m
capacity against vacuum can be seen in data sheets D 146 (VGA) and D 147 (VGC).
Description
VGA and VGC vacuum pumps are fitted as standard with a micro fine filter on the pump inlet. On the exhaust side of
the pump an oil mist eliminator is fitted which has the function of re-circulating oil back into the circulation system as
well as providing high efficiency separation on the pump exhaust. The motor fan cools both the motor and the pump
housing. Both the motor and pump have a common shaft.
A standard built-in non-return valve on the inlet of the pump, seals the pump from the process when the pump is stopped.
This prevents oil moving into the pumping cylinder when the pump is stationary. Excessive oil in the cylinder could cause
an hydraulic lock when the pump is started and hence undue stress on the rotor blades.
The gas ballast valve (U) which is fitted as standard (at VGA optional) avoids any condensation of a small amount of
water vapour inside the pump and hence emulsification of the oil.
Optional extras: The following standard optional extras can be supplied if required: Vacuum regulating valve (ZRV),
additional non-return valve (ZRK), dust inlet filter, high vacuum suction filter (ZVF), hose connection (ZSA) and motor
starter (ZMS).
D
Q
A
B
T
Q
O
F
A
F
Q
K
3
/hr operating on 50 cycles. The pumping curves showing
M
N
K
I
Q
H
B
I
Q
VGA
VGC
VGA
4
VGA
6
VGA 10
VGA 15
VGA 20
VGC
4
VGC 6
VGC 10
VGC 15
BE 146
1.4.2000
Werner Rietschle
GmbH + Co. KG
Postfach 1260
79642 SCHOPFHEIM
GERMANY
0 76 22 / 3 92-0
Fax 0 76 22 / 39 23 00
E-Mail: info@rietschle.com
http://www.rietschle.com
max.
Rietschle (UK) Ltd.
Bellingham Way
NEW HYTHE
min.
KENT ME20 6XS
UNITED KINGDOM
0 16 22 / 71 68 16
Fax 0 16 22 / 71 51 15
E-Mail: info@rietschle.co.uk
http://www.rietschle.co.uk
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