A hydraulic system is a system where the acting force is increased by raising the pressure. A complete hydraulic system consists of five components: a power unit, a control unit, an actuating unit, an auxiliary unit and hydraulic oil. There are two types of hydraulic systems: hydraulic transmission system and hydraulic control system. Hydraulic transmission systems mainly transmit power whereas hydraulic control systems control the output of the system to meet specific performance requirement.
A hydraulic pump is the power source in a hydraulic system. It is driven by an engine or an electric motor and pumps oil from the hydraulic oil reservoir through the system and eventually outputs the oil pressure to the actuator.
A hydraulic valve is the control unit in a hydraulic system. It is an automatic component driven by pressure oil. The valve is controlled by a distributing valve and pressure oil and usually works with an electromagnetic pressure control valve. It can be used to remotely open or shut the oil, gas or water pipeline.
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