Fixed Ball Valve

Fixed ball valve is the mainstream type of high-performance ball valve, whose core feature is that the ball is fixed in the valve body by two upper and lower valve stems, and the central rotation point is in a "fixed" state during operation, without displacement. The pre tightening force of the valve seat sealing ring and the pressure of the pipeline medium work together to achieve bidirectional sealing of the sphere, especially suitable for high-pressure, large-diameter, and critical cutoff conditions. The structure of a fixed ball valve is relatively complex, usually consisting of a valve body, a fixed sphere, a floating or elastic valve seat, a valve stem, and bearings. Its working principle is that during operation, the driving device drives the valve stem of the sphere to rotate 90 °, aligning or making the through-hole of the sphere perpendicular to the flow channel, achieving opening and closing. The significant advantages of fixed ball valves are small opening and closing torque, stable and reliable sealing performance, high pressure resistance level, and minimal wear on the sealing surface. Due to the fixed shape of the sphere, its operating torque is not significantly affected by changes in pipeline pressure, making it easy to equip with large-diameter pneumatic or electric actuators. The turbine fixed ball valve, electric fixed ball valve, pneumatic fixed ball valve, hydraulic fixed ball valve, stainless steel fixed ball valve, forged steel fixed ball valve, three-stage fixed ball valve, two-piece fixed ball valve and other fixed ball valves produced by Kaiweixi Valve are particularly suitable for high-pressure, large-diameter (such as DN200 or above), long-distance pipelines and demanding occasions requiring bidirectional sealing. They are key valves in oil and gas transportation, chemical, power and large industrial facilities.