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ABNORMAL OPERATION
A652-18-880 Issue C
3 ABNORMAL OPERATION
The following usage of the equipment is prohibited:
z Use of the equipment in a zone with a higher ATEX category than that applied to the equipment (for
example, using category 2 equipment in a category 1 system).
z Use of the equipment as a positive pressure compressor.
z Use of the equipment whilst subjected to high back pressure (for example, as caused by an exhaust line
blockage).
z Reverse rotation of the pump.
z Pumping of or use in the presence of potentially flammable or explosive dust atmospheres.
z Use in ambient conditions other than those specified in Section 4.3 of this manual.
z Pumping of pyrophoric materials.
z Pumping gases that cause the inlet pipeline to exceed a surface temperature of 40 °C.
z Pumping of hydrocarbon oxides.
z Pumping of gases that tend to self decompose or are chemically unstable.
z Pumping of IIC gases.
z Use with materials with auto ignition temperatures below the defined temperature rating.
z Operation such that the pump inlet temperature falls below the dew point of a flammable vapour. This could
lead to condensate that can collect and lead to the risk of corrosion or an ignition hazard.
z Use with oxygen enriched atmospheres.
z Use in an external atmosphere where there is a potentially flammable dust atmosphere.
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