Pumps are usually rated according to their volumetric output and pressure. Volumetric output (delivery rate or capacity) is the amount of liquid that a pump…
All pumps create flow. They operate on the displacement principle. Fluid is taken in and displaced to another point. Pumps that discharge liquid in a…
Figure 2-2, shows a power-driven pump operating a reversible rotary motor. A reversing valve directs fluid to either side of the motor and back to…
An electro-hydraulic stepper motor (EHSM) is a device, which uses a small electrical stepper motor to control the huge power available from a hydraulic motor…
A limited rotation hydraulic motor provides a rotary output motion over a finite angle. This device produces a high instantaneous torque in either direction and…
In this type, the axial reciprocating motion of the pistons is obtained by a swash plate that is either fixed or variable in its degree…
As the name implies, these pumps discharge a fixed quantity of oil per revolution of the pump shaft. In other words, they produce flow proportional…
They are also known as hydro-dynamic pumps. In these pumps the pressure produced, is proportional to the rotor speed. In other words, the fluid is…
The sole purpose of a pump in a hydraulic system is to provide flow. A pump, which is the heart of a hydraulic system, converts…
A variable displacement pump is more expensive, but it adds tremendous options for the design of a fluid power circuit. A servo valve can be…