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Operating Instructions
Vacuum pumps
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Pump ranges
These operating instructions concern the following oil lubricated rotary vane vacuum pumps:
CLFG 11, CLFG 16, CLFG 26, CLFG 41, CLFG 61, CLFG 81, CLFG 101 (ultimate vacuum 50 mbar abs.)
Version (01)
Exhausted air exiting through an exhaust grill
Version (02)
Exhausted air exiting through a threaded exhaust port
The vacuum capacities at atmosphere are 10, 15, 25, 40, 60, 80 und 100 m
curves showing capacity against vacuum can be seen in data sheet D 101.
Description
The CLFG vacuum pumps are fitted as standard with a micro fine inlet 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. Metered lubrication is achieved utilising a built in oil
pump. Situated between the pump housing and the motor, a high efficiency cooling fan pulls air in through the oil tank,
over the double walled cylinder and out 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.
All the pumps are driven by a direct flanged three phase, standard TEFV motor via a pin and bush coupling.
Vacuum can be adjusted to the required levels, however, they are limited to a maximum point (see regulating valve (C)).
Optional extras: The following standard optional extras can be supplied if required: additional non return valve, dust inlet
filter, high vacuum suction filter, direct on line (DOL) motor starter and various vacuum gauges.
Suitability
The units CLFG 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.
These models can be used for the evacuation of a closed system or for a permanent vacuum from:
CLFG (50 Hz): 50 to 700 mbar (abs.)
CLFG (60 Hz): 50 to 500 mbar (abs.)
Using the pumps on permanent operation outside these ranges 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 is
no problem with the oil system providing the vacuum limit can be achieved within a 10 minute pump down time.
Amounts of water vapour, water, other liquids, aggressive gases, or vapours may not be handled.
Handling of inflammable or aggressive gases and vapours is only possible with special versions, if the safety
instructions XE 2 are 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.
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see picture
see picture
3
/hr operating on 50 cycles. The pumping
CLFG
CLFG
11
CLFG
16
CLFG (01)
CLFG
26
CLFG
41
E
CLFG
61
CLFG
81
CLFG 101
BE 101
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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