1. Rotary Vane Vacuum Pump 2. light weight, low noise 3. Equipped ... can also be used for the booster pumps, diffusion pumps, molecular pumps pump the first stage, the maintenance of pumps, pre- ... rotary vane vacuum pump1. Small size, light weight, low noise2. Equipped with gas ballast valve, can be a ... rotary vane vacuum pump Type2XZ-12XZ-22XZ-4Pumping speed(L/s)124Ultimate pressure (Pa)6×10-²6×10-²6 ...