The hydraulic end can be selected and installed with discstructure inlet and outlet valve group or cone structure inlet and outlet valve group to meet the requirements of different working conditions. It is suitable for metallurgical descaling,secondary oil recovery,tertiary oil recovery,water injection,injection,hydraulic plunger pump and other industrial applications requiring large flow. This series ofproducts can transport 0~50°C water,emulsion,and other chemical property similar to water liquids.