The hydraulic power unit of the filter press is also called a hydraulic pump station or oil station, which is mainly composed of a hydraulic pump, a driving motor, an oil tank, a directional valve, a throttle valve, an overflow valve, and other hydraulic source devices or hydraulic devices including control valves. The hydraulic power pump station is a pump station that provides hydraulic power in the hydraulic system. It uses hydraulic oil as the medium, and the medium that meets the required flow rate and pressure is sent out by the pump (vane pump, gear pump, rotary pump, plunger pump, etc.) through the original power (electric motor or other power) to supply the hydraulic system.