ATEX
18 GA02411_002_C0 - 10/2016 - © Leybold
Special Requirements for Safe Usage “X”
Conforming utilisation of this pump demands the connection of, and oper-
ation with purge gas for Category 3 (inside).
For particle, respectively dust filters, the use of a mesh of 40 µm max. will
be mandatory in connection with ATEX applications so as to ensure the
safe operation.
If dusts occur, then an approved dust filter must be used and must be
electrically connected to ground correspondingly.
The pump must exclusively be filled and operated with the oil LVO 210 as
the operating agent.
The use of any other kind of oil may result in increased surface tempera-
tures and cause severe damage to the pump.
During normal operation, the oil temperature must not exceed 80° C when
air cooled, and 60 °C when water cooled. A regular check will be neces-
sary, see also Section 3.5 Oil Temperature.
The pump must be installed such that oil sight glass and SP-Guard are
easily visible and cannot be damaged. The oil level must be checked regu-
larly.
The pump must be installed so that only minimal quantities of dust can
deposit themselves on the surfaces. In those cases where dust deposits
form, measures must be introduced to remove these a regular basis.
The pumps must only be operated at an ambient temperature ranging
between 10 °C and 40 °C.
The maximum gas admission temperature must not exceed 100 °C.
The maximum overpressure at the gas inlet must not exceed p
amb
+ 55
mbar.
The maximum exhaust back pressure must not exceed p
amb
+ 200 mbar.
Safety Measures
Hot Surfaces
Compression of the gases will during normal operation of the vacuum pump
cause it to heat up resulting in hot surfaces. Tests have shown that during
conforming operation of the pump (in accordance with these Operating
Instructions) the process gas path which might come into contact with a
potentially explosive atmosphere, attains during operation at a nominal fre-
quency of 50 Hz or 60 Hz a maximum temperature below 160 °C.
The maximum temperatures are attained during constant operation at an inlet
pressure below 300 mbar (absolute). The actually attained temperature
depends on the inlet pressure.
Higher maximum surface temperatures can occur when not filling and oper-
ating the pump with the oil LVO 210.
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