Explosion-proof mechanical booster pumps are approved for use in potentially explosive atmospheres.

The EH500C mechanical booster pump is approved for use in CSA (Canadian Standards Association) Section 1, Gas Class I, Group CD and Dust Class II, Group FG, Temperature Class T3C operating environments. The temperature classification of the pump is based on the discharge pressure of the pump maintained below the critical inlet pressure of 10 mbar (1 x 10 ³ Pa) with no flow.

The mechanical booster pump type EH, based on the Roots principle, is still the pump of choice for applications that require high suction capacities at pressures in the range of 0.01 to 10 mbar. This pump must always be operated with a backing pump that can pump against atmospheric pressure.

Since mechanical booster pumps operate at relatively low pressure, they are not as exposed to corrosive process media as the backing pump and are therefore highly reliable.

Explosion-proof mechanical booster pumps can be supplied with individual explosion-proof motors or as part of an explosion-proof system. Consult Edwards for advice.