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il free reciprocating piston vacuum pump, also known as dry vacuum pump, is the use of crankshaft, connecting rod mechanism to drive the piston in the pump cylinder to do reciprocating motion, so that the volume of the working chamber in the pump cylinder changes. When the volume of the studio expands. When the volume of the working chamber shrinks, the gas that is pumped (sucked) is discharged out of the compressed F, so that the reciprocating motion can generate vacuum in the pump and achieve the purpose of transportation.

The structure and principle of oil-free reciprocating piston vacuum pump are the same as those of reciprocating compressor, but their purposes are different. The purpose of compressor is to increase the pressure of gas, and W-type reciprocating piston pump is to reduce the pressure of inlet gas, so as to get the highest vacuum.

The structure of oil-free reciprocating piston vacuum pump is the same as that of reciprocating compressor. It is composed of pump body, cylinder, gas valve assembly, piston, piston rod, crosshead, connecting rod, crankshaft and other parts.