2XZ series vacuum pump has bipolar direct connecting structure, the working performance is consisted of high pressure and low pressure grades. The inhalant hole connects with vacuum equipment, the air in the container will be inhaled and exhausted greatly while running. The high pressure grade drain valve will close when the equipment acquires vacuum, the air inhaled by high pressure grade will be transferred to second grade, and inhale or exhaust through second grade, so the vacuum equipment can acquire certain vacuum. The technical parameter of the pump is 6X10-2Pa. The pump connects with electric machine with high rotating speed, small outline, impact structure and is convenient for liquidity working. This pump is suitable for metallurgy, chemical, electric light vacuum, vacuum film coating, food packing, medicine, electronic and drying unit use.