high temp ball valve Description
High-temperature ball valves employ a metal-sealed structure with metal-to-metal sealing. The sealing can be interchangeably metal-to-metal with metal sealing rings, stainless steel plate with graphite composite plate sealing rings with metal sealing. Besides electric drive, the driving forms of hard-sealed butterfly valves include manual, worm gear drive, and pneumatic. The butterfly plate of the high-temperature ball valve is installed in the diameter direction of the pipeline. Within the cylindrical passage of the hard-sealed ball valve body, the disc-shaped butterfly plate rotates around the axis, with a rotation angle between 0° and 90°. When rotated to 90°, the valve is in the fully open position.
high temp ball valve Specification
| Valve size | 2" ~ 48" (DN50-DN1200) |
| Pressure | ANSI Class 150~2500(PN16-PN420) |
| Temperature | -60ºC~ 500ºC |
| Body Materials | Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel |
| Design | ASME 16.34/ API 6D |
| Face to Face | ASME B16.10 |
| End Flange | ASME B16.5 |
| BW End | ASME B16.25 |
| Test | API 598/ BS 6755 |
| Fire Safe Test | API 607/API 6FA |
high heat ball valves
The main issues encountered in the application of high-temperature ball valves include seal failure and high-temperature seizing. Seal failure mainly manifests as internal leakage. There are several reasons for this, primarily:
1) Improper selection of coating materials, hardening processes, and poor process stability leading to insufficient surface hardness, resulting in wear; or low bonding strength between the coating and substrate leading to detachment.
2) Poor fit of sealing components causing various issues such as particle accumulation and unstable operation. These factors combined contribute to the eventual failure of the seal.
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