6 Operating the pump with less than the specified amount of cooling
water will result in excessively high surface temperatures. Moreover,
there exists the risk of suffering burns.
0.4 Hazards Caused by Materials and Substances
1 The vacuum line must be leaktight. Hazardous process gases may
escape or the pumped gases can react with air or atmospheric humid-
ity. After installation of the pump and after servicing work on the vacu-
um system, a leak search will always be necessary.
When pumping toxic, corrosive and reactive gases we recommend a
leak search on a regular basis. Leaks in the pump cannot be ruled out
under all circumstances. When pumping hazardous gases, the opera-
tor must ensure that that leaks at the pump will not be a hazard.
2 Before commissioning the pump, make sure that the media which are
to be pumped are compatible with each other so as to avoid hazard-
ous situations.
All relevant safety standards and regulations must be observed.
3 If required additional monitoring of the purge gas quantities is neces-
sary from the side of the operator when a well-defined and ensured
dilution is necessary from the side of the process.
The type of protection depends on the specific process and needs to
be assessed by of the customer.
4 The cooling water from the return is not of drinking water quality and
should not be used for this purpose.
After having operated the pump, the cooling water lines may suffer
from microbiological contamination. Take appropriate safety precau-
tions.
5 Before operating the pump with a gas ballast or a purge gas check the
compatibility of the gas with the pumped media so as to avoid danger-
ous conditions during operation.
6 Secure the purge gas supply so that in the event of a malfunction no
overpressure can occur in the system.
7 When the pump has been used to pump hazardous gases before,
introduce appropriate safety precautions before opening the intake or
the discharge connections. Before opening the pump, purge it for a
longer period of time with an inert gas. If necessary, wear gloves,
breathing protection or protection clothing and work under a fume
hood. Firmly seal off the pump. When shipping the decontaminated
pump for servicing please also indicate the type of hazard. For this see
Section 5.1 Service at Leybold.
8 Leybold is not in a position to perform servicing (repairs) and waste
disposal of radioactively contaminated pumps. Both needs to be
ensured from the side of the user.
DANGER
