Elmo Rietschle V-VGD 11 Originalbetriebsanleitung Seite 45

4.2 Data plate
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Type / size (mechanical version)
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Year of construction
3 Serial number
4 Item No.
5 Suction capacity 50 Hz
Fig. 4 Data plate (example)
4.3 Description
The V-VGD 11, V-VGD 16 and V-VGD 21 have a fine mesh filter on the suction side and on the outlet side an
oil and oil mist separator to return the oil to the oil circulation system.
The motor fan cools the motor and the pump housing. The motor and the pump have a common shaft.
An integral non-return valve prevents the evacuated system from being ventilated after the pump has
stopped. If the machine has been idle for more than two minutes the connected pipe should be ventilated to
atmospheric pressure.
A gas ballast valve (Fig. 2- 3/U) prevents water vapour condensation getting inside the pump if low amounts
of steam are sucked in when the pump is at operating temperature.
4.4 Areas of application
These oil-sealed rotary vane vacuum pumps V-VGD 11, V-VGD 16 and V-VGD 21 are suitable for creating
vacuum. The suction capacity with unrestricted suction is 10 m³/h, 15 m³/h and 20 m³/h at 50 Hz.
These types are suitable for the evacuation of closed systems. These types are not suitable for a continuous
operation mode. The switching interval may not exceed 12 times an hour (start/stop) at a pressure range of
2 – 100 mbar (abs.) for V-VGD 11, V-VGD 16 and 1.5 – 100 mbar (abs.) for V-VGD 21.
If the unit is operated constantly outside these ranges there is the risk of oil leaking through the outlet open-
ing. When evacuating closed systems the volume to be evacuated must be no more than 2 % of the nominal
suction capacity of the vacuum pump.
If the unit is switched on more frequently (at regular intervals of about 12 times an hour) or at
higher ambient temperatures and intake temperatures, the excess temperature limit of the motor
winding and the bearings may be exceeded. Please contact the manufacturer should the unit be
used under such conditions.
If it is installed in the open air the unit must be protected from environmental influences, (e.g. by
a protective roof).
Prematic AG, Märwilerstrasse 43, 9556 Affeltrangen www.prematic.ch
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www.gd-elmorietschle.com © Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH
Product overview and functioning
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Speed 50 Hz
Motor output 50 Hz
Operating mode
Final pressure (abs.) 50 Hz
Tel. 071 918 60 60, Mail: v-g@prematic.ch
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