One-piece Ball Valve Two-piece Ball Valve Three-piece Ball Valve Structure And Use Difference
Apr 01, 2024| Ball valve is a commonly used fluid control valve, according to the different structure, ball valve can be divided into one piece ball valve, two piece ball valve and three piece ball valve.
The one-piece ball valve has a simple structure and is composed of a ball and two flanges. When the ball rotates, the flow of the medium is controlled through the hole in the center of the ball. The sealing performance of the one-piece ball valve is poor, and it is suitable for small and medium-sized pipelines.
The two-piece ball valve is composed of a ball, a valve stem, a flange and a gasket, and each end of the ball has a seat connected with the ball, and the seat is sealed when it is in contact with the ball. Two-piece ball valve sealing performance is good, suitable for small and medium-sized diameter pipelines, often used in chemical, oil, natural gas and other industrial fields.
The three-piece ball valve is more complex than the one-piece and two-piece ball valve, and is composed of a ball, a valve body, a seat and a gasket. The sealing performance and pressure resistance of the three-piece ball valve are better, which is suitable for large diameter and high pressure pipelines, and is widely used in petroleum, chemical industry, metallurgy, electric power and other industries.
In general, according to the flow rate of the pipeline, pressure, media and other parameters to choose the appropriate ball valve structure and model. When installing a ball valve, pay attention to maintaining the verticality of the pipe and valve flanges to prevent excessive tightening of the flanges and valve stem, which may affect the normal use of the valve.