1. Wear resistance; Since the hard seal ball valve spout is alloy steel,
Sealing ring is alloy steel surfacing, so hard seal ball valve in the switch will not produce too much wear. (Its hardness coefficient is 65-70) :
2. Good sealing performance; Due to the hard seal ball valve seal is artificial grinding, until the spool and seal ring can be used. So its sealing performance is reliable.
Iii. Light switch; Because the hard sealing ball valve seal ring bottom USES the spring to make the seal ring and the spool tightly hold together, so in the outside force exceeds the spring pretension when the switch is very light.
Long service life: it has been widely used in petroleum, chemical industry, power generation, paper making, atomic energy, aviation, rocket and other sectors, as well as People's Daily life.
Pneumatic ball valve structure is compact, reliable sealing, simple structure, convenient maintenance, sealing surface and the spherical often in the closed state, not easily be medium erosion, easy operation and maintenance, and is suitable for water, solvents, acids and generally working medium, such as natural gas is mainly used for cutting or on line in the medium, can also be used to adjust and control of the fluid.
Compared with other valve types, pneumatic ball valves have angular stroke output torque, open quickly, stable and reliable, widely used, and the following advantages.
1. The thrust bearing reduces the friction moment of the valve stem, making the stem stable and flexible for long-term operation.
2. Anti-static function: spring is set between the ball, valve stem and valve body to export the static electricity generated during the switching process.
3, due to ptFE and other materials have good self-lubrication, friction loss with the ball is small, so the service life of pneumatic ball valve is long.
4, small fluid resistance: pneumatic ball valve is the smallest of all valve classification of fluid resistance, even if the diameter of the pneumatic ball valve, the fluid resistance is quite small.
5, valve stem seal reliable: because the stem only as if rotating without lifting movement, valve stem packing seal is not easy to destroy, and sealing ability increases with the media pressure.
6, seat sealing performance is good: the use of ptFE and other elastic materials made of sealing ring, the structure is easy to seal, and the sealing ability of pneumatic ball valve increases with the increase of media pressure.
advantages
1. Small fluid resistance, full size ball valves are basically no flow resistance.
2. Simple structure, small size and light weight.
3. Tight and reliable. It has two sealing surface, and the ball valve sealing material widely used in various plastics, good sealing, can achieve complete sealing. It has also been widely used in vacuum systems.
4. Easy to operate, fast to open and close,
It only needs to be rotated 90° from full open to full close for remote control.
5. Easy maintenance, simple ball valve structure, sealing ring is generally active, disassembly and replacement are more convenient.
6. When fully open or fully closed, the sealing surface of the ball and seat is isolated from the media, which will not cause erosion of the valve sealing surface when passing through.
7. Wide range of applications, sizes from small to a few millimeters, large to a few meters, from high vacuum to high pressure can be applied.
8. Because the ball valve in the opening and closing process of wiping, so can be used with suspended solid particles in the medium.
High machining precision, high cost, high temperature is not suitable for use, such as impurities in the pipeline, easy to be blocked by impurities, resulting in the valve can not be opened.
