Product description: The valve spool is the core component of the hydraulic valve, which is used to control the flow of liquid in the hydraulic system. The valve spool is usually made of metal material and has a specific shape and orifice. According to different functions and application scenarios, hydraulic valve spool can be divided into many types, such as one-way spool, pressure regulating spool, reversing spool and so on. The hydraulic valve spool changes the relative position between the spool and the seat by moving, rotating, etc., so as to control the flow, pressure and direction of the liquid. Hydraulic valve spool has the characteristics of flexible and reliable, fast response speed, wear resistance, etc., and is widely used in various industrial equipment and mechanical systems.