ATEX
19GA02411_002_C0 - 10/2016 - © Leybold
Hot Gases
Due to compression of the gases, the pump will produce during normal oper-
ation hot exhaust gases. The exhaust gas temperatures will not exceed the
stated maximum surface temperatures of the pump. The exhaust gases need
to be discharged through a suitable exhaust gas system.
Mechanical Sparks
During normal operation no mechanically generated sparks are created.
The intake of particles into the pump must be prevented so as to prevent the
formation of hot spots due to friction.
Electric Sparks
These can be caused by the electric motor and the accessories supplied
with the pump. Where the outside of the pump has been certified then motor
and supplied accessories have the same classification. Follow the manufac-
turer’s information.
Static Electricity
The pump needs to be sufficiently grounded so as to avoid any electrostatic
charging. This is attained when the ground connection is properly connected
at the point provided for this purpose. During normal operation no dangerous
electrical charges will be produced (for further information relating to the haz-
ards caused by static electricity, see CENELEC report CLC/TR 50404: 2003
Electrostatics - Code of practice for the avoidance of hazards due to static
electricity).
In connection with ATEX usage, the electrically conducting link between
pump chamber cover, exhaust flange and gear housing is absolutely manda-
tory! After any assembly work on the pump chamber, this link must be
checked. For this, use a resistance meter and measure the resistance of the
link which must be less than 100 Ohm.
A filter on the intake side must be connected to ground in accordance with
the Operating Instructions of the filter.
Use only the original spare parts from Leybold.
Ground Connection
Between the M 8 tapped blind hole on the pump (see figure) and the frame
ground/ground rail of the frequency converter, an EMC compliant ground
connection (copper strap, for example) must be provided.
Connect ground strap here!
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