Structure and introduction of air source ball valve _ Industry knowledge _ Yangzhong Minghong Instrument Parts Factory

You are here： Home > Industry knowledge > Content

Structure and introduction of air source ball valve

- 2019-07-03-

Air source ball valve<>The sealing is good, but the load of the ball bearing the working medium is all transmitted to the outlet sealing ring. Therefore, it is necessary to consider whether the sealing ring material can withstand the working load of the spherical medium. When subjected to high pressure impact, the sphere may An offset has occurred. This structure is generally used for medium and low pressure ball valves. The ball of the air source ball valve is fixed and does not move after being pressed. The fixed ball valve has a floating valve seat. After the medium pressure, the valve seat moves, so that the sealing ring is pressed against the ball to ensure the seal. Usually mounted on the upper and lower shafts of the ball, the operating torque is small, suitable for high pressure and large diameter valves. In order to reduce the operating torque of the ball valve and increase the tightness of the seal, an oil seal ball valve is presented, which injects a special lubricating oil between the sealing faces to form an oil film, thereby enhancing the sealing property and reducing the sealing property. Operating torque, more suitable for high pressure and large diameter ball valves. The air source ball valve is a valve that can be precisely adjusted. It is widely used, such as the cutting distance for flame cutting. The knob for adjusting the flame temperature is the air source ball valve. The air source ball valve is an important part of the surface measuring pipeline system. The first is the globe valve and the ball valve. Its function is to open or block the pipeline passage. The spool of the needle valve is a very pointed cone, as if the needle pierced the valve seat, hence the name. The surface valve is a pipe fitting. It is a device used to modify the path section and the direction of media movement to manipulate the transport of media. The sealing function of the surface valve refers to the ability of each sealing part of the surface valve to prevent the medium from leaking. It is an important technical function index of the surface valve*. There are three sealing parts of the surface valve: the touch between the sealing surface of the opening and closing parts and the valve seat; the matching of the packing with the valve stem and the stuffing box; the connection between the valve body and the valve cover. The leak in the former place is called the internal leak, which is also known as the lack of strictness, which will affect the ability of the surface valve to block the medium. For blocking valves, internal leakage is not allowed. The leaks in the last two places are called external leakage, that is, the medium leaks from the valve to the outside of the valve. External leakage will constitute material loss, pollute the environment, and in serious cases, it will constitute an accident. With regard to flammable, explosive, toxic or radioactive media, external leakage is not allowed, so it is necessary for the surface valve to have a firm sealing function.

Previous: What is a welded joint

下一条: Installation requirements for ferrule joints

Product Categories

Related Industry Knowledge