Displacement pumps operate on the principle of creating a vacuum to draw in fluid and then mechanically forcing it out. The general working mechanism involves:
Suction Phase – The pump expands its cavity, creating a low-pressure zone that draws fluid into the pump.
Discharge Phase – The pump reduces the cavity size, increasing pressure and forcing the fluid out through the discharge port.
Since displacement pumps move a fixed volume per cycle, their flow rate is directly proportional to the speed of operation (RPM) and displacement volume.
