From these two calculated limit temperatures it will now be necessary to take
into account the value which guarantees the higher degree of safety.
*The value for the glow temperature applies to a dust thickness of 5 mm. In
the case of even thicker dust deposits, the temperature safety margin should
be increased even further.
Potential Ignition Sources
An assessment of the ignition risk was performed in accordance with the
European standard EN 13463-1 (EN 13463-1 Non-electrical equipment for
potentially explosive atmospheres. Part 1: Basic method and requirements).
Based on this assessment the ignition sources listed in the following were
determined which may occur during operation of the pump:
Potential ignition sources Remarks
Hot surfaces inside and outside due to process gas inlet
temperature and gas compression
Hot gases, adiabatic Hot gases from the process which are being
compression pumped, temperature increase owing to gas
compression within the pump.
Hot gases are ejected at the exhaust.
Mechanical sparks Will not occur during normal operation
Electrical sparks Outside of the pump due to motor,
accessories
Static electricity Will not occur during normal operation
Chemical reactions Will not occur during normal operation
Special Requirements for Safe Usage “X”
Conforming utilisation of this pump demands the connection of, and opera-
tion 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 elec-
trically 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 sur-
face temperatures and cause severe damage to the pump.
During normal operation, the oil temperature must not exceed 70° C. A regu-
lar check will be necessary, see also Chapter 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 regularly.
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