As a high-tech enterprise focusing on aluminum product molds, die casting, and machining, Ningbo Beilun Youyuan Machinery Manufacturing Co., Ltd. has rich experience and advanced technology in the manufacture of pressure regulating valve body.
1. Sealing between valve seat and valve core
In the pressure regulating valve body, the seal between the valve seat and the valve core is usually achieved in the following ways:
Contact seal: Contact seal is used between the valve body and the valve seat, and between the valve core and the valve seat, and the sealing is ensured by the close quality of the working surface. In this sealing method, the width of the sealing contact zone is usually accurately controlled within a certain range (such as 0.1~0.2mm) to ensure the sealing effect.
Gap seal: In some cases, gap seal may be used between the valve body and the valve hole, and the sealing is ensured by the small gap between the mating surfaces. This sealing method requires a very precise sealing gap (such as 0.001~0.003mm) to avoid fluid leakage. However, between the valve seat and the valve core, gap sealing is usually not used due to the need for higher sealing performance.
Special sealing materials: In order to improve the sealing performance, the sealing surfaces of the valve seat and the valve core are usually specially treated, such as surfacing or coating with hard alloys. These hard alloys have excellent wear resistance, corrosion resistance and abrasion resistance, which can significantly improve the service life and sealing effect of the sealing surface.
2. Factors that may affect the sealing performance
Impurity contamination: If the fluid contains hard mechanical impurities, these impurities may cause wear and tear on the sealing surface under high-speed flushing, thereby destroying the sealing performance. Therefore, maintaining the cleanliness of the fluid is essential to ensure the sealing performance.
Temperature change: Temperature changes may cause the relaxation of the sealing pair and changes in the size of the parts, which in turn affects the sealing effect. In order to reduce the impact of temperature on the sealing performance, elastic valve seats or other thermal compensation measures may be required.
Sealing surface specific pressure: The specific pressure of the sealing surface directly affects the sealing function and service life of the valve. Excessive specific pressure may cause valve damage, while too small specific pressure may cause leakage. Therefore, the specific pressure of the sealing surface needs to be precisely controlled during the design and manufacturing process.
Material selection: The material selection of the valve seat and valve core has an important influence on the sealing performance. High-quality materials should have excellent wear resistance, corrosion resistance and abrasion resistance to adapt to various harsh working environments. Ningbo Beilun Youyuan Machinery Manufacturing Co., Ltd., as a professional manufacturer, will select suitable materials to manufacture the pressure regulating valve body according to customer needs and working environment.
Manufacturing accuracy: The manufacturing accuracy of the valve seat and valve core is also crucial to the sealing performance. If the manufacturing accuracy is not high enough, it may cause poor fit between the sealing surfaces, thereby affecting the sealing effect. Therefore, the processing accuracy and assembly quality need to be strictly controlled during the manufacturing process.
In summary, Ningbo Beilun Youyuan Machinery Manufacturing Co., Ltd. will use advanced processes and technologies to ensure the sealing performance between the valve seat and the valve core when manufacturing the pressure regulating valve body. At the same time, customers also need to pay attention to factors such as maintaining the cleanliness of the fluid, controlling temperature changes, selecting suitable materials and manufacturing accuracy when using the pressure regulating valve body to ensure the long-term stable operation of the pressure regulating valve body.