VACUUBRAND PC 301 - Manual (Page 11)

Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 999147 / 17/06/2014
page 11 of 40
• Consider interactions and chemical reactions of the pumped media. Ensure
that the materials of the pump’s wetted parts are compatible with the pumped
substances, see section „Technical data“.
When changing the substances pumped, we recommend purging the pump with
air or inert gas prior to changing the pumped media. Purging the pump will pump
out residues and it will reduce the possibility of reactions of the pumped substan-
ces with each other and with the pump’s materials.
Safety during operation
➨ Adopt suitable measures to prevent the release of dangerous, toxic, explosive,
corrosive, noxious or polluting fluids, vapours and gases. To prevent any emis-
sion of such substances from the pump outlet, install an appropriate collecting
and disposal system and take protective action for pump and environment.
➨ You must take suitable precautions to prevent any formation of explosive mix-
tures in the pump chamber or at the outlet of the pump. In case, e.g., of a dia-
phragm failure, mechanically generated sparks, hot surfaces or static electricity
may ignite these mixtures. Use inert gas for gas ballast or venting, if necessary.
➨ Drain appropriately or otherwise remove any potentially explosive mixtures at the
outlet of the pump, or dilute them to non-explosive concentrations.
☞ Prevent any part of the human body from coming into contact with vacuum.
☞ Make sure that the exhaust pipeline cannot become blocked.
☞ Comply with applicable regulations when disposing of chemicals. Take into con-
sideration that chemicals may be contaminated. Take adequate precautions to
protect people from the effects of dangerous substances (chemicals, thermal de-
composition products of fluoroelastomers). Use appropriate protective clothing
and safety goggles.
☞ Interruption of the pump (e.g., due to power failure), failure of connected compo-
nents or of parts of the supply, or change in parameters must not be allowed to
lead to dangerous conditions. In case of a diaphragm failure or in case of a leak
in the manifold, pumped substances might be released into the environment or
into the pump housing or motor.
Comply with all notes regarding proper use of the pumps, as well as operation
and maintenance guidance.
☞ The residual leak rate of the equipment might render possible an exchange of
gas, albeit extremely slight, between the environment and the vacuum system.
Adopt suitable measures to prevent contamination of the pumped substances or
the environment.
• Pumping at high inlet pressure may lead to overpressure at the gas ballast valve.
Pumped gases or condensate might be expelled if the valve is open. If an inert
gas supply is connected to the gas ballast, ensure that its inlet pipeline is not
contaminated.
• Pay attention to the safety symbol ”hot surfaces” on the equipment. Hot parts
may cause burns if touched. Adopt suitable measures to prevent any danger aris-
ing from hot surfaces or electric sparks. Ensure that hot surfaces of the pump do
not cause burns. Provide a suitable contact guard if necessary.
Prevent the backpressure of gases and the backflow of condensates at the outlet.
NOTICE