Technical Characteristics of Ball Valves
Technical characteristics of ball valve
Ball valve has a circular hole, the sphere is the opening and closing parts, the ball with the valve stem rotation to achieve opening and closing movement of the valve. Ball valve is evolved from the cock, also known as spherical plug valve.
Ball valve is mainly used for cutting, distribution and change the flow direction of media, V-shaped ball valve opening also has a good flow control function.
The fully equal bore of the valve body provides a very small, straight-through flow path for the medium. Ball valve is not only simple structure, good sealing performance, but also in a certain nominal through the scope of the smaller, light weight, less material consumption, small size, and driving torque is small, easy to operate, easy to quickly open and close, easy to operate And maintenance, for water, solvents, acids and natural gas and other general working medium, but also for poor working conditions of the medium, such as oxygen, hydrogen peroxide, methane and ethylene. Ball valve body can be integrated, it can be combined.
The use of ball valves is very wide, the use of varieties and quantities continue to expand, to high temperature, high pressure, large diameter, high sealing Life, excellent regulating performance and a valve multi-functional direction, its reliability and other performance indicators have reached a high level, and has partially replaced the valve, globe valve, throttle. It is widely used in aerospace, petrochemical, long-distance pipeline, light industry food, building and many other aspects.
Compared with other types of valves, sanitary ball valve has many outstanding advantages, the main features are as follows:
1, the ball valve fluid resistance is small, with the lowest flow resistance (actually zero)
2, the ball valve can be opened and closed switch quickly and easily.
3, sealing performance of ball valve is great
Ball valves have generally two structures such as reduced diameter and not reduced diameter channel. Either way, sanitary valve flow resistance coefficient is relatively small. In particular, the so-called full-flow type, that is not reduced diameter ball valve, the channel diameter is equal to the diameter of the pipe, that is, in all valves, the valve flow resistance is minimum. In the rocket launch and its test system, the resistance of the transmission pipeline is as small as possible.