Power unit with components:

1. Motor, Oil Pump：Provide driving force for the hydraulic system, oil pumps can be vane pumps (variable vane pump, fixed pump); gear pumps (internal gear pump, external gear pump).

2. Solenoid Directional Control Valve：Also known as wet type solenoid valve, control the direction of flow of hydraulic oil in the system, and change the direction of movement of the hydraulic cylinder.

3. Relief Valve：There are two types of relief valve namely as solenoid relief valve and hydraulic relief valve. Commonly seen in power units with solenoid relief valve, with the solenoid valve and circuit design, a variety of uses stacked to achieve space-saving effect. The main function of the relief valve is to prevent the entire hydraulic system from overpressure, equivalent to a safety valve, protect the safety of the pump and the oil system, maintaining a constant pressure of the hydraulic system.

4. Check Valve：Usually installed in the oil pump outlet, when the machine stops to prevent the hydraulic oil backflow, resulting in the system motor, oil pump will instant reversal.

5. Pressure Reducing Valve：Suitable for a system requiring different pressure applications, and has two (or more) hydraulic circuit pressure needs.

6. Flow Control Valve：In the hydraulic system, you can change the flow rate of the circuit pressure oil, allow to change the hydraulic motor or hydraulic cylinder movement speed, and the flow rate able to limit the flow.

7. Filter：According to the circuit design of the power unit, there will be two filter ports in the oil tank. One is installed at the suction inlet/outlet of the oil pump to avoid impurities in the hydraulic oil of the tank. Another one is installed in the hydraulic oil return line of the system to ensure the quality of the hydraulic oil returned to the tank from the hydraulic cylinder or operating line of the machine. The other one is installed in the hydraulic oil return line of the system to ensure the quality of the hydraulic oil returning to the tank from the hydraulic cylinder or operating line. There is a differential pressure alarm device on the piping system, when the filter is clogged, it can be visually or by telecommunication number to indicate the alarm, then the filter should be cleaned or replaced.

8. Pressure Gauge：Used to display the working pressure of the hydraulic station, in order to facilitate the user to view the pressure.

9. Oil Level Meter：As the name suggests, in order to view the scale of hydraulic oil in the tank tool, which installed on the side of the tank and show real-time display of hydraulic oil level.

10. Temperature Gauge：Depending on the demand and display the temperature of the hydraulic oil.

11. Air-Cooled Radiator：Through the cooled radiator to effectively suppress the temperature rise, the hydraulic parts and hydraulic oil can extend the service life, is an indispensable part of the power unit to stabilize the oil temperature.