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Three-piece butt welding ball valve has the following advantages:

1. The fluid resistance is small, and the resistance coefficient is the same as the pipe section of the same length.

2. Simple structure, small volume and light weight.

3. Compact and reliable, the sealing surface material of the ball valve is widely used in plastic, good sealing, and has been widely used in the vacuum system.

4. Easy operation, fast opening and closing, rotation of 90° from full open to full close, convenient for remote control.

5. Easy maintenance, simple ball valve structure, sealing ring is generally active, disassembly and replacement are relatively 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 the 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.

The ball valve is mainly used to cut off or connect the medium in the pipeline, can also be used for fluid regulation and control, compared with other valves, it has the following advantages.

1, small fluid resistance, ball valve is the least resistance of all valves, even if the diameter of the ball valve, the fluid resistance is also quite small.

2. The thrust bearing reduces the friction torque of the valve stem, making the stem stable and flexible for long-term operation.

3, the valve seat sealing performance is good, using ptFE and other elastic materials made of sealing ring, the structure is easy to seal, and the ball valve sealing ability increases with the increase of media pressure.

4, 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 capacity with the media pressure increased and increased.

5, due to ptFE and other materials have good self-lubrication, friction loss with the ball is small, so the long service life of the ball valve.

6, lower valve stem and stem head convex order to prevent the stem ejected, such as fire caused by stem seal damage, convex order and valve body can also form metal contact, to ensure the stem seal.

7. Anti-static function: spring is set between the ball, valve stem and valve body to export the static electricity generated during the switching process.

Design and manufacturing :GB12237-89, API608, API 6D, JPI 7S-48, BS5351, DIN3357.

Flange dimensions :JB/T74~90(JB74~90), GB9112~9131, HGJ44~76, SH3406, ANSI B16.5, JIS B2212~2214, NF E29-211, DIN2543.

3. Structure length :GB12221-89, ANSI B16.10, JIS B2002, NF E29-305, DIN3202.

4. Main test :JB/T 9092, API 598.