2oth pump and compressor are designed according `to internationally advanced technology. It is widely used in pumping pure,water-fast, and innocuous gas, so that vacuum and pressure is produced in the sealed container.It is also used in pumping caustic, flammable, and explosive gas, supposed we change the material, structure, and introducean explosion-proof electromotor.Single grade adoption, availability of segregator, existence of gas entrance from different directions, addition of drain tap maintaining windown on the surthce, make it simple, effective, reliable and easy to maintain. It is widely used in Papermaking, Chemical lndustery, Petrification Industry, Light Industry, Medicine Production, Foodstuff, Metallurgy, Building Materials, Coal Washing, Chemicals etc.Items:2BEA-103~2BEA-705/2BEC-42~2BEC-72,Motor power 11~630KW,extract capacity 290~27000m3/h,Limit vacuum -0.097~-0.084MPa。