What is the sealing principle of directional control valve? How to ensure its sealing performance?

Directional control valves play a vital role in hydraulic systems, and their sealing performance is directly related to the normal operation and stability of the hydraulic system. Understanding the sealing principles of directional control valves is a key step in ensuring their functional reliability. The sealing principle of directional control valve involves two types of seals: static seal and dynamic seal.

Static seal refers to the seal between the valve body, valve core, valve seat and other components. The realization of this seal usually depends on the processing quality of the sealing surface and the selection of materials. Good processing quality ensures that the flatness and surface roughness of the sealing surface meet the requirements, and suitable materials can ensure the stability and integrity of the sealing environment. In directional control valves, the effectiveness of the static seal directly affects the sealing effect between the valve body and the valve core, so the processing of the sealing surface and the selection of materials are crucial.

Dynamic seal refers to the seal between the valve core or valve stem and the valve body, which plays a key role when the valve core or valve stem moves. Dynamic sealing is usually achieved by using components such as sealing rings, sealing pads or sealing chambers. These components are usually made of materials with good elasticity and wear resistance. This dynamic seal provides effective sealing when the valve plug or stem moves, preventing hydraulic fluid from leaking or entering areas where it should not enter.