replace DSH081N Hydraulic valve

Accurate use and maintenance of hydraulic systems depend on a thorough understanding of fluid characteristics and the function of mechanical components. In order to operate and maintain a hydraulic system, people working in the field must have some basic knowledge of fluid power, but also need to be familiar with the seven basic components that make up the hydraulic system.
Many hydraulic systems seem extremely complex, but in fact, their basic design principles are quite simple. Regardless of the complexity of a hydraulic system, every system consists of seven basic components:
 storage oil tank;
 the pipeline used to transmit fluid power;
 Hydraulic pump that converts input power into fluid power;
 Pressure control valve for regulating pressure;
 control the direction of fluid flow direction control valve;
 the flow control device to adjust the speed or flow;
 The actuator that converts hydraulic energy into mechanical energy.