Definitions for "PISTON PUMP"
a high pressure pump of the positive displacement variety which substantially consists of a powerful electric motor, transmission mechanism and crank mechanism, as well as a pump assembly with a pump block, valves and a number of plungers or pistons
a positive displacement pump which means it delivers variable output in
a type of "entrainment" pump whereby gas entering the inlet is trapped inside and then must be expelled as a separate part of the operating cycle