What is the difference between floating and fixed ball valves?
Fixed ball valve is the ball with the lower stem fixed, pressure will not produce movement, therefore, in the design, two sealing ring must have sufficient preload to ensure that the valve seat and sphere seal, is a two sided forced seal. Thrust or sliding bearings are usually provided on the upper and lower stems of the ball.
Floating ball valve ball is floating in the medium under pressure, the ball can have a certain displacement along the center axis and pressed in the export side of the seat ring, to ensure that the export side seal and the inlet end cannot seal, the floating ball valve is a single force seal form.
Ball valve according to whether the ball is supported, can be divided into spheres, floating and fixed type of two.
