Hydraulic Pumps convert mechanical energy (from motor or engine) into fluid energy and they are called positive displacement pumps. Typical hydraulic pumps fall into three categories Piston, Vane and Gear.
Hydraulic Motors convert hydraulic power (hydraulic fluid flow) to mechanical rotation force. Their rotation speed can be steplessly adjusted by controlling the supply flow, while their supply torque depends on the difference between the motor inlet and outlet pressures. The motors are available in gear, vane and piston types. Piston motors with variable displacement also available.
Hydraulic Valves control pressure and flow in hydraulic circuits and are grouped according to the control method to be achieved in each system.
They come in different types: Directional Control Valves, Relief Valves, Sequence Valves Counterbalance Valves, Check Valves, Proportional Valves, Mobile Valves, Pressure Control Valves….. etc.