Delivering exceptional functionality and durability, Parker’s extensive line of hydraulic pumps deliver ideal performance in even the most demanding industrial and mobile applications. Parker’s comprehensive line includes gear pumps, piston and vane pumps, gold cup hydrostatic transmission pumps and flow dividers and intensifiers.Piston pumps and plunger pumps are reciprocating positive displacement pumps that use a plunger or piston to move media through a cylindrical chamber. They are also called well service pumps, high pressure pumps, or high viscosity pumps because they can deliver high pump pressures and are capable of handling both viscous and solids containing media.