Vacuum Pumps - Elmo Rietschle VC Serie Instructions De Service

Operating Instructions

Vacuum pumps

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Pump ranges
These operating instructions concern the following oil flooded rotary vane vacuum pumps: VC 400 to VC 1300
The vacuum capacities at atmosphere are 400, 550, 700, 830, 1100 and 1280 m
curves showing capacity against vacuum can be seen in data sheet D 233.
Description
VC 400 to VC 1300 vacuum pumps are fitted with a micro fine filter or fine mesh filter on the pump inlet depending upon
the application. The vacuum pump is enclosed in a sound box. 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. Situated between the pump housing and the motor, a high efficiency cooling fan pulls
air in through the oil cooler, 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.
This prevents oil moving into the pumping cylinder when the pump is stationary. Excessive oil in the cylinder could cause
an 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 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 pin and bush coupling.
Optional extras: The following standard optional extras can be supplied if required: Vacuum regulating valve (ZRV),
vacuum gauge (ZVM), direct on line (DOL) motor starter (ZMS), soft starter (ZAD), filter servicing indicator and oil level
control.
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.
The ultimate vacuum can be user selected at either 0.5 mbar (abs.) for fine vacuum or 10 mbar (abs.) for coarse vacuum
(see adjusting bolt (X)).
These models can be used for the evacuation of a closed system or for a permanent vacuum from:
Fine vacuum ➝ 0.5 to 100 mbar (abs.) • Coarse vacuum ➝ 10 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.
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 5 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.
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A
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D
H M
1
E
X
3 /hr operating on 50 cycles. The pumping
VC
VC 400
H
VC 500
VC 700
VC 900
VC 1100
E
VC 1300
K K I
1
BE 233
1.2.2006
Gardner Denver
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@
de.gardnerdenver.com
www.rietschle.com