Sealing Method: Adopts a metal-to-metal (e.g., stainless steel, cemented carbide, etc.) contact sealing structure. Sealing is achieved through precise cooperation between the ball and the valve seat. The sealing surface undergoes hardening treatment (such as surfacing, spraying, and other processes), resulting in high hardness and strong wear resistance.
Core Components: Mainly composed of the valve body, ball, valve seat, valve stem, and driving device (manual, pneumatic, electric, etc.). The ball and valve seat are critical for sealing; their surface precision and hardness directly affect the sealing performance and service life.
The driving device drives the valve stem to rotate, causing the ball to rotate 90° around the center line of the valve body, thereby realizing the full opening or full closing of the valve:
- When fully open, the through-hole of the ball aligns with the pipeline channel, allowing the medium to pass smoothly;
- When fully closed, the sealing surface of the ball fits tightly with the valve seat, blocking the flow of the medium.
- High Temperature and High Pressure Resistance: The metal sealing structure can adapt to high-temperature (up to several hundred degrees Celsius or even higher) and high-pressure (up to several tens of megapascals) working conditions, making it suitable for extreme environments.
- Wear and Corrosion Resistance: The hardened sealing surface is resistant to scouring and wear, and has strong adaptability to media containing particles, dust, etc. Some materials can resist corrosive media.
- Reliable Sealing: It can maintain good sealing performance with a low leakage rate even after long-term use and under harsh working conditions.
- Wide Application Range: It can be equipped with different driving methods to meet the control needs of various industrial scenarios.
- Petrochemical Industry: Used in high-temperature and high-pressure pipelines, and transportation systems for corrosive or particle-containing media.
- Power Industry: Suitable for controlling high-temperature and high-pressure media such as steam and hot water in power plants.
- Metallurgical Industry: Plays a role in links such as metallurgical furnaces and high-temperature material transportation.
- Natural Gas and Energy Industry: Used in natural gas long-distance pipelines, coal chemical industry, and other high-pressure working conditions.
