Operation
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GA03108_002_C1 - 04/2018 - © Leybold
With small vacuum vessels, the maximum permissible pressure differential
can be briefly exceeded (max. 3 min) upon start-up. If a pressure switch has
been installed, do not set it to this higher pressure because it will fail to pro-
tect the pump against overload in the event of a greater gas quantity.
It is advisable to switch the RUVAC WS on and off via a pressure switch to
ensure that it runs only in the permissible pressure range.
4.2 Operation
When the RUVAC is operated at a pressure difference of ∆p > 10 mbar or at
> 60 Hz.then LVO 210 should be used.
Do not operate the pump without having connected the flanges to a vacu-
um system. Observe safety informations 0.2.
The screws of the flanges on the suction and the pressure side must not
be loosened in the presence of a vacuum or while the pump is still running.
During operation of the RUVAC, check the lubricant level from time to time
and also the condition of the lubricant. Correct as required (see Section 5.2).
Normally, the oil LVO 100 is light-brown. If it turns dark, this is a sign of early
ageing due to excessively high temperatures. When using PFPE as intended,
PFPE will not be subject to ageing.
Dirt Ingress into the Oil via the Piston Rings
In the case of dusty processes which are frequently vented with atmospheric
air, there is the risk of dust being forced into the oil chambers. This can be
prevented by a pressure equalisation between the oil chamber and the pump
chamber. For this, install a valve at the oil inlet which during operation is
opened simultaneously with the venting valve.
Run the Roots pump exclusively under the operating conditions for which it
has been designed. Any modification of the operating parameters (e. g.
intake pressure, intake temperature, ratio between Roots pump and
backing pump) for a longer period may place an inadmissible thermal load
on the pump. Increases in temperature which are not compensated by
taking suitable measures may damage the Roots pump and/or the backing
pump.
Hot surfaces, risk of suffering burns.
Notice safety information 0.3.
Note the labels on the pump.
Never open the oil-fill or oil-drain screw in the presence of a vacuum or
while the pump is running. There is the danger that oil may squirt out.
NOTICE
CAUTION
CAUTION
