Long-life non-contact pump

A long-life non-contact pump comprising:

• a pump cylinder having a certain pumping space for accommodating introduced fluid and receiving/discharging the fluid through a pumping operation via an inlet and an outlet formed on both sides thereof, the pump cylinder including an outlet valve that is provided on an outlet side and prevents backflow of the fluid when the fluid flows in along the inlet and an inlet valve that is provided on an inlet side and prevents backflow of the fluid when the fluid is discharged along the outlet;
• a bellows provided in the pumping space of the pump cylinder and varying a volume of the pumping space so as to pump the fluid flowing in/out along the inlet and outlet;
• a piston that closes one end of the bellows and moves together with the bellows;
• a reciprocating rod that is integrally connected to the piston and extends outward of the pump cylinder to expand and contract the bellows by reciprocally driving together with a movement of the piston;
• a cylinder cover that closes a part of the pump cylinder and fixes the other end of the bellows, and through which the reciprocating rod passes;
• and
• a reciprocating drive unit provided on the outside of the cylinder cover to drive the piston reciprocally along the connected reciprocating rod,
• wherein a vacuum space is formed, and vacuum is maintained inside the bellows in an expanded and contracted state through a vacuum line formed in the cylinder cover.