... and application:1.From the atmospheric pressure to limit pressure have the higher suction speed2.To provide a clean, effluent free vacuum ... the space flight,solar power, chemical, pharmaceutical and petrochemical industries3.To pumping various gases:H2,O2,SF6 etc.4.It can ... the same type dry pump,this pump energy saving 20% to 60%, do not produce the industrial waste water, zero emissionsParameter ...