Parker, Parker PV series axial plunger pump the packard Parker plunger pump is a piston or plunger reciprocating motion direction parallel to the axis of plunger pump and cylinder center.

But for the hydraulic oil pollution more sensitive, more complex structure, cost is higher.

Axial piston pump is the use of parallel to the shaft of the plunger in the plunger hole reciprocating motion generated by the volume change for work. Because of the plunger and plunger hole are circular parts, when processing, can achieve high precision