HK series Hydraulic power unit is a sepatate hydraulic system unit which can supply oil,control the fluid direction, pressure and flow according to the central instruction. So that it can be used for different hydraulic manchinery which can be separate from its main engine. Customer only need to connect the hydraulic power unit with the executive device(oil cylinder and oil motor)by oil pipe, all the required action can be done. The hydraulic power unit combines the pump, hydraulic manifold block and valve, tank and control panel into one system.