WLW oil-free vertical vacuum pump is a replacement product of the original W-type horizontal reciprocating vacuum pump, which improves vacuum cleanliness. It is widely used in vacuum distillation, evaporation, crystallization, drying, and filtration in petroleum, chemical industry, food, pharmaceutical and other fields. Waiting process. Exhaust gas can be recovered. The pump has the characteristics of low wear rate of moving parts, low power consumption, low water consumption, and small floor space. Reduced shear wave vibration and low noise.