widely used in election industry,vacuum drying,filter ,steep,coating,jointing,smelt and lab equipment field. ... or combined with booster pumps,diffusion pump,molecular pump or other high vacuum.widely used in election industry,vacuum drying,filter ,steep,coating,jointing,smelt ... .250.370.551.12.2Size of suction port(mm)1616/625/12/625/12/640/2540/25 2xz-8 Rotary Vane Vacuum Pump