What is a ball valve? Ball Valve is the quarter-turn valve of which the opening and closing member (ball) is driven by the valve stem and rotates around the axis of the ball valve. What are the ball valve types? In terms of valve structure, we have floating ball valve and trunnion-mounted ball valve. The ball inside the floating ball valve is free to float. In contrast, the trunnion ball is fixed ...

In terms of valve structure, we could divide ball valve into floating ball valve and trunnion-mounted ball valve. The working principle for floating ball valve: The ball inside the valve body is floating, since it does not have lower stem to fix and support the ball. Under medium pressure, the medium pushes the ball, and the ball can generate a certain displacement and press on the sealing surface...

For trunnion-mounted ball valve, there is a metal seat ring and a soft seat insert to ensure the sealing performance of seat. The seat inserts are element mounted inside a metal seat ring and perform the same sealing functions as seat ring. There are mainly two types of seat insert materials, elastomeric and thermoplastic. Elastomeric seat insert is softer to achieve zero leakage of ball valve. Wh...

The spool ball of the floating ball valve moves between the two seat sealing rings with the help of medium pressure, while the spool ball of the trunnion mounted ball valve is connected with the valve stem and rotates around the center of the valve stem, and the floating seat support ring. Floating Ball Valve The ball of the floating ball valve is floating. Under the action of medium pressure, the...

Valve pressure rating is one of the primary parameters used to determine whether a valve can safely operate in a specific piping system. In industrial applications, pressure class does not simply represent the maximum working pressure of a valve. The actual pressure capability depends on the pressure-temperature rating defined by standards such as ASME B16.34, as well as valve materials, design co...