What is the processing technology of direct acting relief valve valve core and valve seat?

In the hydraulic system, Direct Acting Relief Valve is a key pressure control component. Its performance is directly affected by the processing quality of the valve core and valve seat. As the core components of the valve, the precision of its processing technology is directly affected by the valve core and valve seat. It is related to the sealing, flow control accuracy and service life of the valve.

1. As a key component for controlling fluid flow, the machining accuracy of the valve core is very important. The material selection of the valve core must consider its wear resistance, corrosion resistance and strength requirements. High-quality materials such as stainless steel and alloy steel are usually used.
Rough machining: The rough machining stage of the valve core mainly includes turning, milling and other processes to remove the material allowance and form a rough outline shape. At this stage, the machining allowance must be strictly controlled to ensure the smooth progress of subsequent finishing machining.
Heat treatment: In order to improve the hardness and wear resistance of the valve core, heat treatment processes such as quenching and tempering are often required. These processes can significantly improve the physical properties of the material, making it more suitable for high-pressure and high-speed fluid environments.
Finishing: Finishing is a key link in valve core processing, including grinding, grinding, polishing and other processes. High-precision grinding equipment is used to finely process key parts such as the sealing surface and guide surface of the valve core to ensure that it is consistent with the valve core. The fitting accuracy and sealing performance of the valve seat, grinding and polishing further improve the surface finish of the valve core and reduce the resistance to fluid flow.
Inspection and assembly: After processing is completed, the valve core needs to be comprehensively inspected, including inspection of dimensional accuracy, geometric tolerance, surface roughness and other indicators. The qualified valve core will be cleaned, oiled and finally assembled into the valve.

2. As the valve seat is a key component that cooperates with the valve core to form a seal, its processing technology is equally important.
Material selection and rough machining: Valve seats are usually made of high-hardness, high-wear-resistant materials that match the valve core, such as carbide, ceramics, etc. In the roughing stage, the basic shape and size are formed through turning, milling and other processes.
Precision processing: The sealing surface of the valve seat needs to be precision processed to ensure a close fit with the valve core. This usually includes grinding, honing and other processes to form a smooth and flat sealing surface. The guide surface of the valve seat also needs to be processed to ensure the smooth movement of the valve core during the opening and closing process.
Quality inspection: After the processing is completed, the valve seat needs to be comprehensively inspected, including the flatness, hardness, wear resistance and other indicators of the sealing surface. The sealing performance of the valve core also needs to be tested to ensure that the two cooperate well.

The processing technology of Direct Acting Relief Valve valve core and valve seat is a complex and delicate process, involving material selection, rough machining, heat treatment, finishing, testing and other links. Only by strictly controlling each processing step can the valve core and valve seat be ensured. The processing quality of the valve seat ensures the performance and service life of the entire valve.