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Characteristics of ball valves
Classification: Company News
Dec 25,2024
First, wear-resistant; because the spool of the hard seal ball valve is alloy steel spray welding, sealing ring is alloy steel surfacing, so the hard seal ball valve will not produce too much wear and tear when switching. (Its hardness coefficient is 65-70)
Second, good sealing performance; because the seal of hard seal ball valve is manually grinding, until the spool and the seal ring completely match before use. So his sealing performance is reliable.
Third, the switch is light; because the hard seal ball valve sealing ring at the bottom of the spring so that the sealing ring and the spool held tightly together, so in the outside world force exceeds the spring preload switch is very light.
Fourth, long service life: has been widely used in petroleum, chemical, power generation, paper, atomic energy, aviation, rockets and other departments, as well as people's daily life.
Pneumatic ball valve simple and compact structure, reliable sealing, easy maintenance, sealing surface and the ball surface is often in a closed state, not easy to be media erosion, easy to operate and maintain, suitable for water, solvents, acids and natural gas and other general working media, mainly used to cut off or connect the pipeline medium, can also be used for fluid regulation and control.
Pneumatic ball valves and other types of valves, compared with the angular stroke output torque, open quickly, smoothly and reliably, widely used, as well as some of the following advantages:
1, thrust bearing reduces the friction torque of the valve stem, which can make the valve stem operate smoothly and flexibly for a long time.
2、Anti-static function: a spring is set between the ball, valve stem and valve body, which can export the static electricity generated during the switching process.
3, due to PTFE and other materials have good self-lubrication, and the friction loss with the ball is small, so the service life of the pneumatic ball valve is long.
4, small fluid resistance: pneumatic ball valve is the smallest fluid resistance of all valve classifications, even if it is a reduced diameter pneumatic ball valve, its fluid resistance is quite small.
5, reliable stem sealing: because the valve stem only rotating movement without lifting movement, the valve stem packing seal is not easy to destroy, and sealing capacity with the media pressure increases.
6, good sealing performance of the valve seat: the use of PTFE and other elastic materials made of sealing ring, the structure is easy to seal, and pneumatic ball valve valve sealing capacity with the increase in media pressure and increase.
7, small fluid resistance, full bore ball valve basically no flow resistance.
8, simple structure, small size, light weight.
9, tight and reliable. It has two sealing surfaces, and the sealing surface material of the ball valve is widely used in a variety of plastics, the sealing is good, can realize the complete seal. In the vacuum system has also been widely used.
10, easy to operate, open and close quickly, from fully open to fully closed as long as the rotation of 90 °, easy to control from a distance.
11, easy maintenance, simple structure of the ball valve, the seal is generally active, disassembly and replacement are relatively convenient.
12, in the fully open or fully closed, the ball and the sealing surface of the valve seat and the media isolation, the media through, will not cause the valve sealing surface erosion.
13, a wide range of applications, the diameter from small to several millimeters, large to several meters, from high vacuum to high pressure can be applied.
14, because the ball valve in the opening and closing process of wiping, so can be used in the medium with suspended solid particles.
15, high processing precision, expensive, high temperature should not be used, such as impurities in the pipeline, easily blocked by impurities, resulting in the valve can not be opened.
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