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© Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH
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Set up and operation
7
4
5
10
2
6
8
9
1
3
4.1.1 Data plate
Fig. 3 Data plate
4.2 Description
The C-VLR 301 model has a connection flange on the inlet side and an exhaust silencer on the pressure side
(Fig. 2/B
1
). The air sucked in is cleaned by a micro-filter. An integral non-return valve prevents the evacuated
system from being ventilated after the pump has stopped.
The ZEPHYR VLR 301 is a double shaft rotary piston vacuum pump in which the claws roll off against each
other contact free and dry. The counter-rotating claw rotors are synchronised by a gear pair in the gearbox.
The synchronous gearbox gear wheels and the bearings are lubricated with oil. These components are in
a gearbox that also contains the oil supply. Oil conveying devices always ensure that the bearings and the
gear wheels are sufficiently supplied with oil at all permissible speeds.
The gearbox and the compression chamber are separated from each other by special seals. The gearbox
is sealed from the outside with shaft seals and O rings, the compressor chamber with piston rings. The
VLR 301 is enclosed in an insulating hood. In order to dissipate compression heat, the cooling air is sucked
through between the machine and the hood using a drum fan that sucks in the fresh cooling air (Fig. 2/E)
and discharges the heated air out of the cooling air outlet (Fig. 2/F).
The VLR 301 is driven by standard flanged three-phase motors via a coupling.
A vacuum relief valve is incorporated into the machine.
4.3 Areas of application
This contact free running claw vacuum pump, the C-VLR 301, can be operated constantly at any pressure
between 700 mbars (abs.) and an inlet pressure of 150 mbars (abs.).
When evacuating closed systems the volume to be evacuated must be no more than 2% of the nominal
suction capacity of the vacuum pump.
The suction capacity with unrestricted suction is 290 m
3
/h at 50 Hz. Data sheet D 890 shows the depend-
ency of the suction capacity on the intake pressure.
Design “XD”: The vacuum pump is provided with a corrosion-resistant coating and is suitable for conveying
water-moist gases (water vapor). Special accessories are optionally available.
Please find further information in the supplementary sheet M 34.
If the unit is switched on more frequently (at regular intervals of about 10 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).
1
Type/ Size (mechanical version)
2
Serial number
3
Year of construction
4
Data matrix barcode
5
Item no.
6
Speed
7
Motor rating
8
Operating mode
9
Suction capacity
10
Ultimate vacuum (abs.)
Following information are encrypted in the barcode:
• Material number (MA)
• Production order (PR)
• Serial number (SC)
