Piston Pumps

When high operating pressures are required, piston pumps tend to be used. Piston pumps will traditionally endure higher pressures than equipment pumps with similar displacements; however, there exists a higher initial cost connected with piston pumps as well as a lower resistance to contamination and improved complexity. This complexity falls to the gear designer and service technician to understand to be able to make certain the piston pump is working correctly with its extra shifting parts, stricter filtration requirements and closer tolerances. Piston pumps are often used with truck-installed cranes, but are also found within other applications such as snow and ice control where it could be desirable to vary system stream without varying engine rate.

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

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