 |
| Quantity: | |
|---|---|
J-VALVES
Structural Features
CF8M Stainless Steel Valve Body: Precision cast from CF8M (316 stainless steel) containing 2–3% molybdenum, providing excellent resistance to pitting corrosion, crevice corrosion and chloride-induced stress corrosion cracking, suitable for corrosive media and marine environments.
Triple Eccentric Design: The triple eccentric structure eliminates friction between the disc and seat during opening and closing; contact occurs only at the moment of full closure, significantly extending seal life and achieving zero-leakage sealing.
Metal-to-Metal Sealing: The disc sealing surface is hardfaced with Stellite alloy or nickel-based alloy, while the seat is made of solid metal or hardfaced with wear-resistant alloy. It features high temperature resistance and erosion resistance, ideal for high-temperature, high-pressure conditions and media containing solid particles.
Large-Bore High-Pressure Design: 24" (DN600) large bore with Class 900 (PN150) pressure rating. Wall thickness is calculated in accordance with ASME B16.34. Critical components including body, disc and stem are verified by finite element analysis to ensure structural integrity under high-pressure large-bore conditions up to 15 MPa.
Flanged Connection: RF (Raised Face) or RTJ (Ring Type Joint) flanged connections in compliance with ASME B16.5, ensuring reliable installation and sealing performance for large-bore high-pressure applications.
Bidirectional Sealing Performance: The triple eccentric structure combined with a flexible metal seat achieves bidirectional zero-leakage sealing to meet requirements of bidirectional flow conditions.
Fire-Safe Design: Complies with API 607 standard. The metal sealing structure is inherently fire-safe and maintains sealing functionality under fire conditions.
Anti-Static Device: An anti-static device is installed between the stem and body to ensure continuous electrostatic conduction, meeting safety requirements for explosive hazardous areas.
Anti-Blowout Stem Design: The stem features a top-mounted anti-blowout structure with an internal retaining shoulder to prevent stem ejection under abnormal pressure, ensuring operational safety.
Low Operating Torque: The frictionless triple eccentric design combined with precision bearings significantly reduces opening and closing torque for large-bore high-pressure applications, facilitating cost-effective automation.
Adjustable Seat: On selected models, the seat can be adjusted or replaced inline, extending service life and reducing maintenance costs.
Technical Specifications
Nominal Size: 24" (DN600)
Pressure Class: Class 900 (PN150)
Temperature Range: -29℃ to +425℃
Body: CF8M (316 stainless steel); alternatives include CF8 (304), CF3M (316L), WCB, WC6, WC9, C5, C12A
Disc: CF8M, CF8M with Stellite hardfacing, WCB with ENP, Inconel 625 overlay
Stem: F316, 17-4PH, Inconel 718, XM-19
Seat: Multi-layer metal seal (stainless steel + graphite + stainless steel), solid Stellite alloy, Inconel 625, RPTFE (low-temperature type)
Bearing / Bushing: 316 stainless steel + PTFE composite, Devlon, PEEK, self-lubricating metal bearing
Leakage Class: Zero leakage in accordance with API 598, ISO 5208 Rate A, MSS SP-61 zero leakage
End Connection: Flanged (RF / RTJ); wafer and lug types available on request
Operation: Manual, pneumatic, electric, hydraulic
Design Standard: API 609, ASME B16.34
Test Standard: API 598
Face-to-Face Dimensions: In accordance with ASME B16.10
Quality Certification: API 609
Application Areas
Oil & Gas Long-Distance Pipelines: Used as large-bore trunk line block valves, station inlet and outlet valves, and compressor station isolation valves, replacing gate valves for quick operation and lightweight construction.
Chemical and Petrochemical Plants: High-temperature, high-pressure large-bore fluid control in catalytic cracking, hydrocracking and ethylene cracking units, replacing high-temperature gate valves and globe valves.
Metallurgical Industry: High-temperature large-bore medium control for blast furnace gas, converter gas and hot blast stove systems.
Seawater Desalination and Water Treatment: CF8M material resists seawater corrosion, while the large-bore design meets high seawater intake flow requirements.
General Industrial Large-Bore Applications: Control and isolation of large-bore media including water, oil, gas and steam.
Advantages and Value
Triple Eccentric Zero-Leakage Sealing: Metal-to-metal torque sealing meets API 598 zero-leakage standards, making it a reliable alternative to gate valves and ball valves in critical shutoff applications.
Lightweight for Large-Bore High-Pressure Service: 40–60% lighter and 50% more compact than comparable gate valves, reducing pipeline support costs and installation space requirements.
Fast Operation for Energy Efficiency: 90° quarter-turn operation takes only 1/10 the time of gate valves, suitable for emergency shutdown and frequent cycling.
Frictionless Long-Life Design: No contact between disc and seat during operation minimizes sealing face wear, resulting in significantly longer service life than conventional butterfly valves.
Reliable Bidirectional Sealing: Triple eccentric structure with flexible metal seat provides bidirectional zero leakage, independent of installation orientation.
Intrinsically Safe Design: Multiple safety features including fire-safe, anti-static and anti‑blowout functions. SIL 3 certification is available to meet functional safety requirements.
