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Advantages of one-piece, two-piece and three-piece stainless steel ball valve
That is, the working principle of Guangzhou-type ball valve is to make the valve unblocked or blocked by rotating the valve. The ball valve is portable, small in size, can be made into a large diameter, reliable in sealing, simple in structure and convenient in maintenance. The sealing surface and spherical surface are often closed, and are not easy to be eroded by media. It is widely used in various industries.
Two-piece ball valve
Structural features:
1. Open and close without friction. This function completely solves the problem that the sealing of traditional valves is affected by the friction between sealing surfaces.
2. Top-mounted structure. The valve installed on the pipeline can be directly inspected and maintained 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 valve cavity affects the use safety due to abnormal pressure rise.
4. Low torque design. The valve rod with special structure design can be opened and closed easily with only a small handle valve.
5. Wedge sealing structure. The valve is sealed by pressing the ball wedge onto the valve seat with the mechanical force provided by the valve stem, so that the sealing performance of the valve is not affected by the change of the pipeline pressure difference, and the sealing performance is reliably guaranteed under various working conditions.
6. Self-cleaning structure of sealing surface. When the ball is tilted away from the valve seat, the fluid in the pipeline passes through the valve seat at 360 ° along the sealing surface of the ball, which not only eliminates the local scouring of high-speed fluid on the valve seat, but also washes away the accumulation on the sealing surface to achieve the purpose of self-cleaning.
Three-piece ball valve
advantage:
1. The fluid resistance is small, and its resistance coefficient is equal to the pipe section of the same length.
2. Simple structure, small size and light weight.
3. It is tight and reliable. At present, the sealing surface material of ball valve is widely used in plastic, with good sealing performance, and has also been widely used in vacuum system.
4. It is easy to operate and open and close quickly. It only needs to rotate 90 ° from full open to full close, which is convenient for remote control.
5. Convenient maintenance, simple structure of ball valve, movable sealing ring, easy disassembly and replacement.
6. When the valve is fully open or closed, the sealing surfaces of the ball and valve seat are isolated from the medium. When the medium passes through, it will not cause the erosion of the valve sealing surface.
7. It can be used in a wide range of applications, ranging from a few millimeters to several meters in diameter, from high vacuum to high pressure.
