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Protective mea-
sures, depending
on application
Observe vacuum
pump design
Note mechanical
load capacity
20901367_EN-US_PC3001 VARIO select Serie_V1.3_100720
Possible protective measures
ð Purge the vacuum pump with inert gas or air before chang-
ing the medium to be pumped.
ð Use inert gas to dilute critical mixtures.
ð Prevent the release of hazardous, toxic, explosive, corro-
sive fluids, gases or vapors or those that are harmful to
health or the environment, for example, through suitable
laboratory facilities with a fume hood and ventilation control.
ð Protect the inside of the vacuum pump from deposits or
moisture, e. g, through the provision of a gas ballast.
ð Be aware of interactions and possible chemical reactions of
the pumped media.
ð Check the compatibility of the pumped substances with the
wetted materials of the pumping unit.
ð Contact us if you have concerns about using your vacuum
pump with certain working materials or media.
Prevent foreign bodies inside the pump
Particles, liquids and dust must not get inside the vacuum pump.
ð Do not pump any substances which could form deposits in-
side the vacuum pump.
ð Install suitable separators and/or filters upstream of the in-
let. Suitable filters are chemical-resistant, clog-proof and
have a reliable flow rate, for example.
ð Replace porous vacuum hoses without delay.
2.8 Possible sources of danger
Take mechanical stability into account
The high compression ratio of the pump may result in a higher
pressure at the outlet than the mechanical stability of the system
allows.
ð Always ensure that the outlet line is clear and non-pressur-
ized. The outlet must not be blocked to ensure that gases
can exit freely.
ð Prevent uncontrolled overpressure, e. g, due to a locked or
blocked piping system, condensate or clogged outlet line.
ð At the gas connections, the connections for the inlet IN and
outlet EX must not be mixed up.
Safety information
17
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