Rotary vane vacuum pump is a type of positive displacement oil sealed vacuum pump, which drives the sliding plate to rotate in the stator chamber through an eccentric rotor, periodically changing the volume of the working chamber, thereby inhaling, compressing and discharging gas. This product has a compact structure, high ultimate vacuum, and stable pumping speed, making it one of the most widely used low to medium vacuum acquisition equipment in the laboratory, industrial, and medical fields. Applied to freeze-drying, vacuum oven, molecular pump front-end experiments; Sterilization cabinet, dental suction, vacuum concentration; Vacuum impregnation and vacuum packaging; Drying of lithium batteries, degassing of transformers, and vacuuming of refrigeration systems.