Wear Resistance: Because the valve core of the hard-seal ball valve is made of alloy steel by spray welding, and the sealing ring is made of alloy steel by overlay welding, the hard-seal ball valve does not experience significant wear during opening and closing. (Its hardness coefficient is 65-70).
Excellent Sealing Performance: The seal of the hard-seal ball valve is achieved through manual grinding until the valve core and sealing ring are perfectly aligned. Therefore, its sealing performance is reliable.
Smooth Opening and Closing: The sealing ring of the hard-seal ball valve uses a spring at its base to tightly hold the sealing ring and valve core together. Therefore, opening and closing is very smooth even when external forces exceed the spring's preload.
Long Service Life: Widely used in petroleum, chemical, power generation, papermaking, nuclear energy, aviation, rocket, and other sectors, as well as in daily life.
Pneumatic ball valves have a simple and compact structure, reliable sealing, and convenient maintenance. The sealing surface and the ball are usually in a closed state, making them less susceptible to erosion by the medium. They are easy to operate and maintain, suitable for general working media such as water, solvents, acids, and natural gas. They are mainly used to cut off or connect media in pipelines, and can also be used for fluid regulation and control.
Compared to other types of valves, pneumatic ball valves offer several advantages, including: angular stroke output torque, rapid and stable opening, wide applicability, and the following benefits:
1. Thrust bearings reduce stem friction torque, ensuring smooth and flexible long-term operation.
2. Anti-static function: Springs between the ball, stem, and body discharge static electricity generated during operation.
3. Due to the excellent self-lubricating properties of materials like PTFE, friction 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 of all valve types; even reduced-bore pneumatic ball valves exhibit very low fluid resistance.
5. Reliable stem sealing: Because the stem only rotates and does not move up and down, the stem packing seal is less prone to damage, and the sealing capacity increases with increasing medium pressure.
6. Good seat sealing performance: The sealing ring, made of elastic materials such as PTFE, is easy to seal, and the sealing capacity of the pneumatic ball valve increases with increasing medium pressure. 7. Low fluid resistance; full-bore ball valves have virtually no flow resistance.
8. Simple structure, small size, and light weight.
9. Tight and reliable. It has two sealing surfaces, and ball valves widely use various plastics as sealing materials, resulting in excellent sealing performance and achieving a complete seal. It is also widely used in vacuum systems.
10. Easy operation; quick opening and closing. Only a 90° rotation is needed to go from fully open to fully closed, facilitating remote control.
11. Easy maintenance; the ball valve has a simple structure, and the sealing rings are generally movable, making disassembly and replacement convenient.
12. When fully open or fully closed, the sealing surfaces of the ball and seat are isolated from the medium, preventing erosion of the valve sealing surfaces during medium flow.
13. Wide range of applications; suitable for diameters from a few millimeters to several meters, and for applications ranging from high vacuum to high pressure.
14. Due to the wiping effect during opening and closing, ball valves can be used with media containing suspended solid particles.
15. It has high processing precision and is expensive. It is not suitable for use in high-temperature environments. If there are impurities in the pipeline, it is easy to get blocked by the impurities, which will prevent the valve from opening.
