What is high temperature ball valve?
The High temperature ball valve consists of components such as the valve body, ball, and metal valve seat. The sealing surface employs hardening technologies like supersonic spraying of chromium carbide, achieving a surface hardness of HRC 60 or above. The elastic compensation structure (e.g., disc springs, metal elastic rings) can absorb thermal expansion deformation. Combined with the floating valve seat and extended valve stem design, it effectively prevents high-temperature jamming. The sealing forms include metal-to-metal hard sealing or composite material sealing. The bidirectional hard sealing design, along with spring preload force, ensures zero leakage in both forward and reverse directions. The driving methods cover manual, pneumatic, and electric actuation, supporting 90-degree quick opening and closing, making it suitable for various media such as water, acid, and natural gas.
The valve body adopts stainless steel forging technology, with some models equipped with a cavity purge interface and external cooling system, capable of handling harsh working conditions like oxygen and methane. The product complies with standards such as GB/T and ASME, featuring a compact structure, wear resistance, and easy maintenance.
Features and Principles
The main characteristics of the high-temperature ball valve are its compact structure, reliable sealing, simple construction, and easy maintenance. The sealing surface and the ball are often in a closed state, making them less susceptible to erosion by the medium. It is easy to operate and repair, suitable for general working media such as water, solvents, acids, and natural gas, as well as harsh-condition media like oxygen, hydrogen peroxide, methane, and ethylene. It is widely used in various industries. The valve body can be either integral or modular.
The high-temperature ball valve has a 90-degree rotary action, with the rotating plug being a ball featuring a circular bore or passage through its axis. In pipelines, the ball valve is primarily used for cutting off, distributing, and changing the flow direction of the medium. It only requires a 90-degree rotation and minimal torque to achieve tight closure. Ball valves are most suitable for on-off and shut-off applications, though recent developments have enabled their use in throttling and flow control, such as V-port ball valves.
The high-temperature ball valve adopts a metal sealing structure, with sealing forms including metal-to-metal sealing, replaceable metal sealing rings against metal sealing, and stainless steel plates with graphite composite sealing rings against metal sealing. The driving methods for hard-sealed butterfly valves include not only electric but also manual, worm gear, and pneumatic actuation. The disc of the high-temperature ball valve is installed along the pipeline's diameter. Inside the cylindrical passage of the hard-sealed ball valve body, the disc-shaped butterfly plate rotates around the axis within an angle range of 0°–90°. At 90°, the valve is fully open.
