ball valve, opening and closing part ( A sphere) Driven by the valve stem, and revolve around the axis of the ball valve. It can also be used for flow regulation and control, including hard seal V V ball valves in its V of carbide surfacing with its strong shear force between metal valve seat, especially suitable for fiber medium and small solid particles, etc. Multipass ball valve not only can flexibly control the flow concentration distribution and flow direction of medium, but also can turn off any channels connecting the other two. The valve should be installed level generally in the pipeline. According to the driver, ball valve can be divided into pneumatic ball valves, electric ball valve and ball valve manually. Ball valve features: 1. Wear resistance; As a result of the hard seal ball valve valve core is alloy spray welding, sealing ring is alloy steel welding, when hard seal ball Industrial Valves, so won't produce too much wear and tear. ( Hardness coefficient for 65, 70 or less) : second, sealed performance is good; Due to the seal by hand grinding hard seal ball Industrial Valves, so until the valve core are in good agreement with the sealing ring, to be used. Therefore, the sealing performance is reliable. Third, the light switch; Due to the hard seal ball valve at the bottom of the sealing ring to use spring to keep sealing ring and valve core tightly together, when external forces than spring pre-tightening force, switch is very light. 4. Long service life: widely used in petroleum, chemical, power, papermaking, atomic energy, aerospace, rockets and other departments and people's life. Pneumatic ball valve structure with simple, compact structure, reliable sealing, convenient maintenance, sealing surface and spherical closed, not easily be medium corrosion, convenient operation and maintenance. Suitable for water, solvents, acid, natural gas and other general working medium, it is mainly used for cutting or connection of the pipeline medium, can also be used to adjust and control of the fluid. Compared with the other valves, pneumatic ball valve has a quarter-turn large output torque, quick opening, the opening is stable and reliable, and the advantages of wide scope of application: 1. Thrust bearing reduces the friction torque of the stem, the stem smoothly and the flexibility to work for a long time. 2. Anti-static function: in the sphere, the valve stem and Industrial Valves body between spring, can output switch process of static electricity. 3. Such as ptfe material has good self-lubricating performance, with small ball friction loss, pneumatic ball valve of a longer service life. 4. Small fluid resistance, pneumatic ball valves are categories of all valves valve fluid resistance small, even if it is to reduce the diameter of the pneumatic ball valve, the fluid resistance is small. 5. Stem seal reliable: can't afford to rise due to stem only rotating movement, the valve stem packing seal is not easy to damage, sealing ability with medium pressure increases. 6. Seat tightness performance good, made of elastic material such as ptfe sealing ring is easy to be sealed, pneumatic ball valve sealing ability increases with the increase of medium voltage. 7. Fluid resistance is small, the diameter of ball valve flow resistance. 8. Simple structure, small volume, light weight. 9, compact and reliable. It has two seal face, and widely used all kinds of plastic ball valve sealing surface of materials, good sealing, can realize completely sealed. Have been widely used in the vacuum system. 10. High-performance ball valve operation is simple, fast opening and closing, from open to close only rotate 90 °, is advantageous for the long distance control. 11. Easy maintenance, ball valve has simple structure, can generally be mobile sealing ring, it is more convenient to remove the replacement. 12. When the ball and seat fully open or closed, the ball and seat sealing surface and the dielectric isolation, when the media through does not cause the valve sealing surface wear. 13. Applicable scope wide, small path to a few millimeters, big to a few meters, from high vacuum to high pressure can be used. 14. Because the ball valve is in the process of opening and closing is wiped, therefore can be used in the medium of suspended solid particles. 15. High machining accuracy and high cost, high temperature should not be used, the impurities such as pipeline, easily blocked by impurities, lead to valve cannot open.

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