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Operating Instructions
Vacuum pumps
max.
min.
Pump ranges
These operating instructions concern the following oil flooded rotary vane vacuum pump:
VCB 20 (ultimate vacuum 2 mbar, abs.)
The vacuum capacity at atmosphere is 20 m
vacuum can be seen in the data sheet D 159.
Description
VCB vacuum pump is fitted with a mesh 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. Situated between the pump housing and the motor, a high efficiency cooling fan pulls
cooling air in through the fan cover, which also provides protection from accidentally touching the fan when the pump
is in operation. 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) ➝ Version (07)) avoids any condensation of a small amount of water vapour inside the pump
and hence emulsification of the oil.
All the pumps are driven by a direct flanged one phase or three phase motor via a pin and bush coupling.
Optional extras: hose connection (ZSA), motor starter (ZMS) and gas ballast valve.
Q
F
P
H
M
K
I
3
/h operating on 50 cycles. The pumping curves showing capacity against
E
E
F
N
O
Q
A
B
Q
Q
F
E
E
F
VCB
VCB 20
U
BE 159
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
Rietschle (UK) Ltd.
Bellingham Way
NEW HYTHE
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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