Ball valve without fixed shaft is called floating ball valve, also known as floating ball valve. There are two seat sealing rings in the body of floating ball valve, and a ball is clamped between them. There is a hole in the ball. The diameter of the through-hole is slightly less than the inner diameter of the pipe. The ball can rotate freely in the seat seal ring with the help of the stem. When opening, the ball hole is aligned with the diameter of the pipe, which ensures the minimum resistance of the pipe working medium. When the stem turns 1/4 turn, the ball hole is perpendicular to the valve channel, and the ball is pressed tightly against the valve seat seal ring at the outlet end by the pre-tightening force and medium pressure added to the two seat sealing rings, thus ensuring the valve is completely sealed. This ball valve is a single-side forced seal.

Application scope of floating ball valve:

Floating ball valves are suitable for general industrial use, and are suitable for chemical, petroleum, natural gas, metallurgy and other industries as well as long natural gas pipeline with hydrogen sulfide containing many impurities and serious corrosion.

Floating ball valves are divided into ordinary carbon steel series WCB and A105 on the basis of shell materials according to different service requirements. Stainless steel series 304,316; Low temperature steel series LCB,LCC; Anti - sulfur series, etc.

Structural features of floating ball valve:

Floating ball valve is mainly characterized by the ball without supporting shaft, the ball is held by two seats in a "floating" state, it is mainly used in the pipeline to cut off, distribute and change the direction of media flow. Floating ball valve main characteristics of the valve seat seal design, reliable reverse seal valve stem, fireproof static function, automatic pressure relief and lock device structure characteristics.

The article comes from: http://www.jztfcy.com