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Ball valves are durable and usually work to achieve perfect shutoff even after years of disuse. They are therefore an excellent choice for shutoff applications. There are two type of ball valves based on the ball type, floating ball valves and trunnion mounted ball valves. Depending on the bore size of the ball itself, ball valves are designated as full port ball valves and reduced port ball valves. A full port or more commonly known full bore ball valve has an over-sized ball so that the hole in the ball is the same size as the pipeline resulting in lower friction loss. Flow is unrestricted but the valve is larger and more expensive so this is only used where free flow is required, for example in pipelines which require pigging.
Principle of the cast steel floating ball valve: This kind of ball valve has a floating
Principle of the forged steel floating ball valve: This kind of ball valve has a floating ball supported by two valve seats. Under the medium pressure effect, a certain displacement can be generated by the ball itself so as to be pressed onto the seat seal ring at the outlet, guaranteeing tightness at the outlet.
The side entry trunnion mounted ball valve has been designed two piece body type or three piece body type and with two floating seats, which are movable
Ball valves: Top-Entry Ball Valve Print this Page Bookmark this PDF Download E-mail Us MAIN FEATURES: The top-entry ball valve is designed as an integrated valve body. Its support and ball rod fixed by an upper-assembled pivot and an integrated pivot respectively and the integrated high-strength ball rod ensure an accurate ball positioning. The
The fully-welded ball valve adopts forged material, welded body, instead of bolts and nuts, to aviod any potential leakage from body