14
|
www.gd-elmorietschle.com
© Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH
Set up and operation
4.2 Description
The C-VLR 401 and C-VLR 501 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 non-return valve (Fig. 2/D)
prevents the evacuated system from being ventilated after the pump has stopped.
The ZEPHYR VLR 401 and C-VLR 501 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 401 and VLR 501 are 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).
Three-phase motor with integral frequency converter (Fig. 2/V) makes possible infinitely variable control of the
speed.
A vacuum relief valve is incorporated into the machine.
4.3 Areas of application
This contact free running claw vacuum pump, the C-VLR 401 and C-VLR 501, can be operated constantly
at any pressure between 700 mbars (abs.) and an inlet pressure of 200 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 380 m
3
/h and 495 m
3
/h at 50 Hz. Data sheet D 886-60
shows the dependency of the suction capacity on the intake pressure.
Version “XD”: The vacuum pump is provided with a corrosion-resistant coating and is suitable for conveying
water-moist gases (water vapor).
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).
