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J-VALVES
Structural Features
Carbon Steel WCB Body：The valve body is cast per ASTM A216 WCB carbon steel, featuring high tensile strength, favorable mechanical properties and pressure-bearing capacity, suitable for medium and high-temperature working conditions.
Triple Eccentric Structural Design：Friction between disc and seat is eliminated to enable rapid valve opening and closing, achieving genuine metal-to-metal contact sealing with outstanding sealing performance.
Metal Hard Sealing：The sealing faces of disc and seat are hardfaced with stainless steel or hard alloy overlay. The structure delivers high temperature resistance, wear resistance and corrosion resistance, applicable for high-temperature, high-pressure media and fluid carrying solid particles.
Zero-Leakage Sealing：The triple eccentric structure generates cam-like self-tightening force upon full closure, realizing bidirectional zero leakage compliant with ISO 5208 Rate A standard.
Flanged Connection：Standard flanged ends comply with EN 1092-1 / GB/T 9113 (PN10), guaranteeing reliable field installation and dimensional interchangeability.
Fire-Safe Design：Conforms to API 607 fire test standard. The metal sealing structure retains sealing integrity under fire exposure to prevent medium leakage.
Anti-Static Device：Built-in anti-static mechanism avoids static accumulation and mitigates fire and explosion hazards.
Anti-Blowout Stem Design：Top-entry anti-blowout stem structure secures operational safety.
Friction-Free Operation：Thanks to triple eccentricity, the disc disengages from the seat during opening and presses tightly against the seat during closing. Sealing surface abrasion is minimized to extend service life.
Compact Construction：Compact overall layout with low weight. It occupies less space than gate valves and globe valves of identical nominal size, facilitating installation and integration into existing piping systems.
Technical Parameters
Size Range: DN2800
Pressure Class: PN10
Temperature Range: -29℃ ~ +425℃
Valve Body Material: ASTM A216 WCB; ASTM A352 LCB/LCC (low-temperature version); ASTM A217 WC6/WC9 (high-temperature version)
Disc Material: WCB with stainless steel overlay; ASTM A351 CF8/CF8M; ASTM A890 4A/5A (duplex stainless steel)
Stem Material: ASTM A182 F6a, F304, F316, 17-4PH
Seat Sealing: SS304/SS316/SS316L hardfaced with Stellite, nickel-based alloy, tungsten carbide
Packing: Flexible graphite, PTFE, carbon fiber
End Connection: Flanged (RF/MF/RTJ), compliant with EN 1092-1, GB/T 9113, ASME B16.5
Operation Mode: Manual (lever/worm gear), pneumatic (double-acting/spring return single-acting), electric, hydraulic
Design Standard: API 609
Test Standard: API 598
Application Fields
Oil & Gas Industry：Deployed in oil/gas field production, gathering pipeline, refining, storage and transportation systems for positive isolation and flow regulation. Adaptable to sulfur-containing and particle-laden process media.
Chemical & Petrochemical Industry：Suited for pipelines and reaction systems transporting high-temperature, high-pressure and corrosive fluids to meet stringent sealing requirements for harsh service conditions.
Metallurgical Industry：Applied to high-temperature gas piping for blast furnace gas, hot blast stoves and heating furnaces.
Water Treatment & Environmental Protection:Used in water supply & drainage, sewage treatment, flue gas desulfurization and denitrification systems for corrosive media service.
Shipbuilding & Offshore Engineering:Installed in ballast water, bilge water and fuel oil systems, meeting requirements for marine classification society certifications.
General Industrial Services:Controls isolation and throttling of water, oil, gas, steam, powder and other common industrial media.
Advantages & Value
Zero-Leakage Sealing Performance:Triple eccentric metal hard sealing realizes bidirectional bubble-tight shutoff, satisfying strict environmental protection and safety codes.
Extended Service Life:No contact friction between disc and seat during cycling. Minimal wear on sealing surfaces supports tens of thousands of open-close cycles.
Excellent High-Temperature & High-Pressure Compatibility:Metal sealing withstands temperatures exceeding 600℃, applicable for severe conditions including high-temperature steam and hot oil.
Reduced Operating Torque:Optimized triple eccentric geometry cuts operating torque by 30%~50% compared with conventional butterfly valves, allowing selection of smaller-sized actuators.
Superior Safety Level:Integrated fire-safe, anti-static and anti-blowout designs plus reliable sealing drastically lower leakage risks and protect personnel and equipment.
Easy Installation & Maintenance:Flanged joints simplify installation. The top-entry stem design enables online replacement of internal components and shortens system downtime.
Wide Service Adaptability:Multiple material grades, pressure ratings and sealing configurations are optional, covering full operating spectrum from cryogenic to ultra-high temperature and vacuum to high pressure.
