The Difference Between Fixed and Float Ball in Ball Valves
Sanitary ball valves are suitable for frequent operations. They open and close quickly, are lightweight, have a small fluid resistance, a simple structure, a relatively small size, are easy to maintain, have a good sealing performance, are not subject to restrictions of installation directions, have no vibration, and have low noise.
What are the types of ball valves?
According to the structures, ball valves can be divided into float ball valves, fixed ball valves, flexible ball valves, and oil sealing ball valves. According to the channel types, they can be divided into direct energy type, angle type, and three-way type. The three-way type can again be divided into T-shaped and L-shaped. According to the connection type, they can be divided into threaded connection, flange connection, and welded connection.
The float ball valve is a type of ball valve whose sphere doesn’t have a fixed axis. The fixed ball valve is a type of ball valve whose sphere has a fixed axis. The fixed ball valve is a new type of high-performance ball valve for long-distance pipelines and general industrial pipelines. In the design stage, its safety and resistance to harsh environments have been intentionally considered. It’s suitable for all kinds of corrosive and non-corrosive media.
The difference between the floating ball valve and the fixed ball valve
Compared with the float ball valve, the force generated by the fluid pressure on the sphere is passed on to upper and lower bearings, so the sphere will not move. The sealing of the valve is achieved by the spring and medium pushing the valve seat, so the valve seat will not bear too much pressure. Therefore, the valve seat of the fixed ball valve keeps its form well and has a light operating torque, a reliable sealing performance, and a long service life. It’s particularly suitable for high-pressure, large-caliber occasions.
The ball of the fix ball valve is fixed and the valve ball does not move under pressure conditions. Fixed ball valves are equipped with a floating seat, the valve seat would create movement under pressure conditions, so that the sealing ring is pressed on the ball to ensure the seal, at the same time the valve seat will not withstand excessive load. Usually in the upper and lower stem with the bearing sleeve, operation torque is small. Therefore, compared with the floating ball valve, the fixed ball valve has small torque, small seat deformation, and stable sealing performance, the fixed ball valves are suitable for high-pressure and large-diameter valves.