Ball valve

One； Wear-resistant ； Since the valve core of a hard-sealed ball valve is made by spray welding of alloy steel, and the sealing ring of a three-piece ball valve is formed by surfacing welding of alloy steel, hard-sealed ball valves do not experience significant wear when opened or closed. (Its hardness coefficient is 65-70): Two ； Good sealing performance ； Since the sealing of a hard-sealed ball valve is achieved through manual grinding, it can be used only after the valve core fits perfectly with the seal ring. So its sealing performance is reliable. three ； The switch is lightweight ； Since the bottom of the sealing ring in a hard-sealed ball valve is equipped with a spring that keeps the sealing ring tightly pressed against the valve core, it is very easy to operate the valve when external forces exceed the pre-tension of the spring. Four ； Long service life: It has been widely used in various industries such as petroleum, chemicals, power generation, papermaking, nuclear energy, aviation, and rockets, as well as in people’s daily lives. Pneumatic ball valves feature a compact structure, reliable sealing, simple design, and ease of maintenance. The sealing surface and the ball are usually in a closed state, making them resistant to erosion by the medium flowing through them. They are easy to operate and maintain, and are suitable for use with various common working media such as water, solvents, acids, and natural gas. They are primarily used to shut off or connect the medium in pipelines, but can also be utilized for regulating and controlling fluid flow. Compared to other types of valves, pneumatic ball valves offer angular stroke torque, rapid and smooth operation with reliability, wide applicability, as well as several other advantages. 1. The thrust bearing reduces the friction torque on the valve stem, enabling smooth and flexible operation of the valve stem over the long term. 2. Anti-static function: Springs are installed between the sphere, valve stem, and valve body to conduct away the static electricity generated during the switching process. 3. Due to the good self-lubricating properties of materials such as polytetrafluoroethylene, the frictional loss with the ball is low, resulting in a long service life for pneumatic ball valves. 4. Low fluid resistance: Pneumatic ball valves have the lowest fluid resistance among all types of valves; even reduced-diameter pneumatic ball valves exhibit quite low fluid resistance. 5. Reliable stem sealing: Since the stem only rotates and does not move up or down, its packing seal is less likely to be damaged, and its sealing capacity increases as the pressure of the medium rises. 6. Good sealing performance of the valve seat: Sealing rings made of elastic materials such as polytetrafluoroethylene ensure effective sealing, and the sealing capacity of the pneumatic ball valve increases as the pressure of the medium rises. Advantages: 1. Low fluid resistance – ball valves with a full bore have virtually no flow resistance. 2. Simple structure, small size, and light weight. 3. Tight and reliable. It has two sealing surfaces, and various plastics are widely used as the materials for these sealing surfaces in ball valves; this ensures good sealing performance and complete isolation. It is also widely used in vacuum systems. 4. Easy to operate with rapid opening and closing; the high-performance ball valve requires only a 90° rotation from fully open to fully closed, facilitating remote control. 5. It is easy to maintain; the ball valve has a simple structure, and the sealing rings are usually movable, making disassembly and replacement straightforward. 6. When fully open or fully closed, the sealing surfaces of the ball and the valve seat are separated from the medium; thus, as the medium passes through, it does not cause erosion of the valve’s sealing surfaces. 7. It has a wide range of applications, with diameters ranging from a few millimeters to several meters, and it can be used in conditions ranging from high vacuum to high pressure. 8. Due to the wiping action of ball valves during opening and closing, they can be used in media containing suspended solid particles. It features high processing precision but is expensive; it is not suitable for use at high temperatures. If there are impurities inside the pipeline, they can easily cause blockages, preventing the valve from opening.