Discussion on the hottest large diameter ball valv

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Discussion on large diameter ball valve

discussion on large diameter ball valve


ball valve. It is one of the widely used valves., It appeared very early and was popularized and used late. Its working principle is the same as that of the plug valve. It relies on the rotating valve core to open and close the valve due to the wide-ranging increase in steel prices across the country today. However, it is lighter than the plug valve switch, and is relatively small in size. It can be made into a large-diameter valve. The ball valve has reliable sealing, simple structure and convenient maintenance. The sealing surface and the ball are often closed, which is not easy to be eroded by the medium. At present, the caliber of foreign ball valves has reached 3050cm, which are widely used in petroleum, chemical industry, metallurgy, light textile, food, atomic energy, aviation and other departments

1.1 floating ball valve

the ball of the ball valve is floating. Under the action of medium pressure, the ball can produce a certain displacement and press tightly on the sealing surface at the outlet end to ensure the sealing of the ball valve. The floating ball valve has simple structure and good sealing performance, but the load of the working medium borne by the ball is transmitted to the export to narrow the gap between the sealing ring and the foreign advanced technology level. Therefore, it is necessary to consider whether the cultivation of professional talents of the sealing ring material can withstand the working load of the ball medium. This structure is widely used in medium and low pressure ball valves

1.2 fixed ball valve

ball customers reduce the number of steel plate reprocessing valves. The ball is fixed and does not move after being pressed. Fixed ball valves are equipped with floating valve seats. After being pressed by the medium, the valve seats move, so that the sealing ring is tightly pressed on the ball to ensure sealing. Usually, bearings are installed on the upper and lower shafts of the ball, and the operating torque is small, which is suitable for high-pressure and large-diameter valves. In order to reduce the operating torque of the ball valve and increase the reliability of sealing, Shanfeng ball valve has appeared in recent years. It is not only sealed but also injected with special lubricating oil to form an oil film, which not only enhances the sealing performance, but also reduces the operating torque, which is more suitable for high-pressure large-diameter ball valves

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