Vacuum Pumps - Gardner Denver Elmo Rietschle Vacfox VC 50 Instructions De Service

Operating Instructions

Vacuum pumps

Pump ranges
These operating instructions
apply to the following oil flooded
rotary vane vacuum pumps:
VC 50, VC 75, VC 100 and VC
150
The nominal vacuum capaci-
ties at atmosphere are 50, 70,
100 and 150 m 3 /hr operating on
50 cycles. The pumping curves
showing capacity against
vacuum can be seen in data
sheet D 231.
Description
VC 50, VC 75, VC 100 and VC
150 vacuum pumps are fitted
with a mesh filter on the pump
inlet. The vacuum pump is en-
closed in a sound box. On the
exhaust side of the pump an oil
mist eliminator is fitted which
has the function of re-circulat-
ing 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
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
a 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 avoids at its operating temperature 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 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) and various vacuum gauges (ZVM).
Suitability
The units VC are suitable for the use in the industrial field i.e. the protection equipments corresponds to
DIN EN 294 table 4, for people aged 14 and above.
These models can be used for the evacuation of a closed system or for a permanent vacuum from: 0.5 to 500 mbar (abs.)
When these pumps are operated permanently outside the ranges listed above there may be oil seepage at the exhaust
port. For evacuation of closed systems the volume to be evacuated must not exceed 2% of the nominal capacity of the
vacuum pump.
For continuous operation > 100 mbar (abs.) we recommend the bigger motor size
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 12 and 40°C. For temperatures outside this range
please contact your supplier.
The standard versions may not be used in hazardous areas.
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.
B
F
E
F
F
F
O
A
E
E
VC
VC 50
U
VC 75
VC 100
VC 150
BE 231
1.2.2006
Rietschle Thomas
Schopfheim GmbH
Postfach 1260
79642 SCHOPFHEIM
GERMANY
Fon 0 76 22 / 3 92-0
Fax 0 76 22 / 39 23 00
e-mail:
info.sch@rtpumps.com
www.rtpumps.com/sch
Rietschle Thomas
UK Ltd.
Bellingham Way
NEW HYTHE
KENT ME20 6XS
UNITED KINGDOM
Fon 0 16 22 / 71 68 16
Fax 0 16 22 / 71 51 15
e-mail:
ukinfo@rtpumps.com
www.rtpumps.com/uk