ABSTRACT
The basic concept of fluid power is simple; mechanical energy is converted to fluid energy, which is then converted back to mechanical energy. In the case of a pump–motor circuit, torque and rpm are converted to flow and pressure by the pump, and the motor converts the pressure and flow back into torque and rpm.
Pressure is required to obtain torque from a motor or force from a cylinder.
Flow is required to generate rotary motion with a motor or linear motion with a cylinder.
