Idiomas disponibles
Idiomas disponibles
Operating Instructions
Vacuum pumps
Pump ranges
These operating instructions con-
cern the following oil flooded rotary
vane vacuum pumps: VC 200 and
VC 300
The nominal vacuum capacities at
atmosphere are 200 and 300 m
operating on 50 cycles. The pumping
curves showing capacity against
vacuum can be seen in data sheet
D 232.
Description
VC 200 and VC 300 vacuum pumps
are fitted with a mesh filter on the
pump inlet. The vacuum pump is
enclosed in a sound box. 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 be-
tween the pump housing and the
motor, a high efficiency cooling fan
pulls cooling air in through the fan cover. A further fan inside of the oil cooler results in the cooling of the re-circulating
oil.
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 which is fitted as standard avoids any condensation of a small amount of water vapour inside the
pump and hence emulsification of the oil. The gas ballast vapour handling capacity can be increased if required to
tolerate higher vapour loads than normal.
All the pumps are driven by a direct flanged three phase, standard TEFV motor via a pin and bush coupling.
Optional extras: The following standard optional extras can be supplied if required: Vacuum regulating valve (ZRV),
additional non return valve (ZRK), dust inlet filter (ZFP), high vacuum suction filter (ZVF), direct on line (DOL) motor
starter (ZMS), softstarter (ZAD) and various vacuum gauges.
Suitability
The units VC are suitable for the use in the industrial field i.e. the protection equipments corresponds to
EN DIN 294 table 4, for people aged 14 and above.
The ultimate vacuum can be user selected at either 0.5 mbar (abs.) for fine vacuum or 10 mbar (abs.) for coarse
vacuum (see adjusting bolt (X)).
These models can be used for the evacuation of a closed system or for a permanent vacuum from:
Fine vacuum
0.5 to 100 mbar (abs.) • Coarse vacuum
When these pumps are operated permanently outside the ranges listed above, there may be oil seepage at the exhaust
port. If closed systems are evacuated from atmospheric pressure down to a suction pressure close to the ultimate
vacuum there will be no problem with the oil system, provided the vacuum limit is achieved within a 10 minute pump down
time.
Amounts of water vapour may be handled. Water, other liquids, aggressive or inflammable gases and
vapours may not be handled. For water vapour tolerance, see information I 200.
Handling of inflammable or aggressive gases and vapours is only possible with special versions, if the safety
instructions XE 2 are noted.
When handling oxygen, the saftey instruction sheet XE 3 should be noted.
The ambient and suction temperatures must be between 5 and 40°C. For temperatures outside this range
please contact your supplier.
The standard versions may not be used in hazardous areas. Special versions with Ex-proof motors can be supplied.
The back pressure on the exhaust port must not exceed + 0.1 bar.
All applications where an unplanned shut down of the vacuum pump could possibly cause harm to
persons or installations, then the corresponding safety backup system must be installed.
O
B
F
3
/hr
E
F
N
E
A
F
D
X
10 to 500 mbar (abs.)
VC
VC 200
M
VC 300
F
E
E
BE 232
1.5.2000
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: [email protected]
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: [email protected]
http://www.rietschle.co.uk
