Piston Pumps

When high operating pressures are required, piston pumps are often used. Piston pumps will traditionally endure higher pressures than equipment pumps with similar displacements; however, there exists a higher initial price associated with piston pumps in addition to a lower level of resistance to contamination and improved complexity. This complexity falls to the equipment designer and service technician to understand to be able to make certain the piston pump is definitely working correctly with its additional moving parts, stricter filtration requirements and closer tolerances. Piston pumps tend to be used with truck-mounted cranes, but are also found within other applications such as snow and ice control where it could be desirable to alter system circulation without varying engine rate.

A cylinder block containing pistons that move in and out is housed within a piston pump. It’s the motion of the pistons that draw oil from the supply port and then pressure it through the outlet. The angle of the swash plate, which the slipper end of the piston rides against, determines the distance of the piston’s stroke. As the swash plate remains stationary, the cylinder prevent, encompassing the pistons, rotates with the pump’s insight shaft. The pump displacement is certainly then determined by the total volume of the pump’s cylinders. Fixed and variable displacement designs are both available.

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