[Valve knowledge] Advantages of Two-piece and Three-piece Type Stainles Steel Ball Valve

Structural features:

1. There is no friction in opening and closing. This function completely solves the problem of traditional valves affecting the sealing due to the friction between the sealing surfaces.

2. Top-mounted structure. The valves installed on the pipeline can be directly inspected and repaired online, which can effectively reduce the shutdown of the device and reduce the cost.

3. Single seat design. It eliminates the problem that the medium in the cavity of the valve affects the safety of use due to abnormal pressure increase.

4. Low torque design. The valve stem with special structure design can be easily opened and closed with only a small handle valve.

5. Wedge-shaped sealing structure. The valve is sealed by the mechanical force provided by the valve stem to press the ball wedge to the valve seat, so that the sealing of the valve is not affected by the change of pipeline pressure, and the sealing performance is reliably guaranteed under various working conditions.

6. Self-cleaning structure of the sealing surface. When the ball is tilted away from the valve seat, the fluid in the pipeline passes evenly along the sealing surface of the ball at 360°, which not only eliminates the local scouring of the valve seat by the high-speed fluid, but also washes away the accumulation on the sealing surface to achieve the purpose of self-cleaning.

Advantages:

1. The fluid resistance is small, and its resistance coefficient is equal to that of the pipe section of the same length.

2. Simple structure, small size and light weight.

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

4. Easy to operate, fast opening and closing, from full open to full closed, as long as the rotation is 90°, which is convenient for long-distance control.

5. It is easy to maintain, the structure of the ball valve is simple, the sealing ring is generally movable, and it is more convenient to disassemble and replace.

6. When fully open or fully closed, the sealing surface of the ball and the valve seat is isolated from the medium, and the erosion of the sealing surface of the valve will not be caused when the medium passes.

7. Wide range of application, from small to a few millimeters, as large as a few meters, from high vacuum to high pressure can be applied.