High Temperature Ball Valve

What temperature limit do standard ball valves have?

Ordinary regular carbon steel ball valves without high-temperature upgrades usually work safely within -20℃ to 180℃. Once working temperature goes above 200℃, common PTFE soft seals will soften, deform and start leaking easily, and ordinary cast steel bodies may gradually warp under prolonged continuous heat. Our regular GB floating ball valves follow this conventional temperature range and are only suitable for room-temperature water, normal-temperature gas and common low-heat industrial fluids, which cannot stand long-term high-temperature steam or hot oil service. In contrast, our dedicated high-temperature ball valves break this limit entirely.

What makes a ball valve "high temperature"?

A ball valve qualifies as high-temperature type mainly from three core upgrades different from standard models. First is customized heat-resistant sealing parts instead of regular PTFE filler; we adopt graphite, metal-to-metal hard seal or special alloy sealing rings that won’t soften under intense heat. Second is optimized body structural design, with special expansion gap reserved inside the valve cavity to offset metal thermal expansion and avoid stuck ball or seal crush at high heat. Third is selected heat-resistant raw materials for body and internal trim. Thanks to these three targeted improvements, the valve stays tight and flexible even under sustained high heat, which is the core difference separating it from ordinary ball valves.

Key Attributes

Which materials are best for the valve body?

Material selection depends directly on actual working temperature. For working temperature below 450℃, alloy steel like WC6 / WC9 is our most cost-effective mainstream pick, widely used on steam and hot oil pipelines in petrochemical and thermal power industries. If working conditions hit up to 550℃ or carry slightly corrosive high-temperature medium, F304 and F316 stainless steel become the preferred option for better heat and corrosion resistance. For ultra-high temperature over 600℃ under extreme harsh working environment, we use special high-temperature chrome-moly alloy steel on customized orders. Ordinary WCB carbon steel used on regular ball valves is never recommended for high-temperature working scenarios.

What common industries need high-temperature ball valves most?

These valves are heavily used in thermal power plants, petrochemical refining, waste heat recovery systems, boiler steam pipelines and asphalt delivery lines. Such working conditions carry continuous high-temperature steam, hot thermal oil and high-heat chemical fluid, where regular carbon steel ball valves cannot sustain long-term stable operation at all.

What pressure grades do your high-temperature ball valves cover?

Our product range covers PN16 up to PN100 to match various high-pressure high-heat working conditions. High-temperature medium usually brings bigger pressure fluctuation, so we thicken valve body wall and strengthen internal component structure compared with normal-temperature GB ball valves to improve overall pressure bearing performance.