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Different Ball Valve Types
What Are the Types of Ball Valves
1. Floating ball valves
The balls of the floating ball valves are floating. Under the action of the medium pressure, the balls can produce a certain displacement and press tightly on the sealing surface of the outlet end to ensure that the outlet end is sealed. The floating ball valves have a simple structure and good sealing performance, but the load of the working medium on the sphere is all transmitted to the outlet sealing ring. Therefore, it is necessary to consider whether the material of the sealing ring can withstand the working load of the sphere medium. When subjected to a higher pressure impact, the sphere may shift. This structure is generally used for medium and low pressure ball valves. Floating ball valves are suitable for general industrial use.
2. Fixed ball valves
The balls of the ball valves are fixed and do not move after being pressed. Fixed ball valves are equipped with a floating seat. After being pressured by the medium, the seat will move so that the sealing ring is pressed tightly on the sphere to ensure sealing. Bearings are usually installed on the upper and lower shafts of the sphere, and the operating torque is small, which is suitable for high-pressure and large-diameter valves.