Author: Site Editor Publish Time: 2018-11-21 Origin: Site
Ball valve is mainly used in connecting or blocking line medium, especially in the pleading agile open closed parts, such as emergency relief. Because the ball valve has a brief layout, less parts, light weight, good sealing performance advantages, it has become increasingly widely used.
Ball valve is composed of the valve body, valve cover, sealing seat, ball and stem, etc. Perforated sphere is the ball valve core. The sphere is controlled by the stem to control opening and closing, and the rotation is the entire switch. Ball valve can be divided into two categories, floating ball valve and the trunnion mounted ball valve. The characteristics of the floating ball valve are the sphere can float at ease.
According to the seal seat ball valve layout is divided into mounted seal seat and unusual seal seat belt activity two kinds. The valve body is equipped with two fluorine molding into mounted sealing seat, and between two seats clamped a floating ball that made of carbon steel or stainless steel. Sphere has a circular hole, after opening, the channels open. When stem shift, the valve perpendicular to the channels. The ball hole is pressured on the back of the seat tightly, and guaranteeing the valve seal.
Next, we make a brief description of the advantages and disadvantages of the advanced ball valves layout.
1. The fluid resistance is small. The ball valve of the full port has no resistance basically.
2. The ball valve layout has the features of the simple structure, small volume, and light weight.
3. The ball valve layout is compact and reliable. The ball valve layout has two sealing surface, and the ball valve sealing surface widely uses all kinds of plastic materials. The ball valve layout has good sealing, and can realize completely sealed. The ball valve layout has been widely used in the vacuum system.
4. The ball valve layout is easy to operate, open and close quickly, and from open to close just rotate 90 °, which is advantageous for the remote control.
5. The ball valve layout is easy to maintain. The ball valve has simple structure. Sealing ring, which generally removes replacement is more convenient.
6. Because the ball valves layout in the process of opening and closing has wiped .it can be used to bring in the medium of suspended solid particles.
The machining precision is high, the price is expensive. It is difficult to use in high temperature, such as pipe contains impurities. It can be blocked by impurities easily, and lead to the valve cannot open.
With the progress of the society, science and technology is more and more important. Ball valve layout is also important to us. I believe, in the future, the ball valve layout will become more and more perfect.