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J-VALVES
Design Features
Integrally Forged Valve Body:Valve body is integrally forged from high-quality forged steels including A105, LF2, F304, F316 and F51 (duplex stainless steel), featuring dense grain structure and high pressure-bearing capacity, suitable for high-pressure service from Class 600LB to 2500LB.
Fully Welded Structure:Valve body is fabricated by butt-welding of cylindrical forgings or fully welded from split forgings, without body flanges or external leakage paths, achieving true zero fugitive emission andcomplying with API 6D requirements for buried service valves.
Electric Actuator Configuration:Multi-turn or part-turn electric actuators with protection grade IP67/IP68 and explosion-proof rating Ex d IIB T4/Ex d IIC T6. Supports communication protocols such as Modbus, Profibus and HART, enabling integration with SCADA systems.
Floating Ball / Trunnion Mounted Ball Optional:DN50–DN200 (2″–8″) adopts floating ball design with pressure-activated self-sealing; DN250 and above (10″ and above) adopts trunnion mounted ball design with low stem torque and easy operation under high pressure.
Seat Sealing Technology:Soft seats (PTFE/RPTFE/PEEK) provide bubble-tight zero leakage; metal seats (Stellite alloy / nickel-based alloy) are high temperature and erosion resistant, with service temperature up to +650℃.
Butt-Weld End Design:BW (Butt Weld) ends comply with ASME B16.25, with groove type automatically matched to wall thickness, high welding joint coefficient, suitable for buried and crossing projects.
Anti-static & Fire-safe Design:Anti-static springs and copper conductors installed between body and ball, stem and body, with resistance <10Ω. Complies with API 607/ISO 10497 fire test, maintaining sealing after fire.
Blowout-proof Stem Design:Stem is equipped with a bottom shoulder to prevent accidental blowout under internal pressure, meeting API 6D safety requirements.
Grease Injection & Sealing System:Grease injection valves provided at seat and stem areas for emergency temporary sealing. Double Piston Effect (DPE) seat design enables self-sealing for either upstream or downstream leakage.
Buried Service Adaptation:Extended stem and protective sleeve optional to locate operating mechanism above ground. Drain and vent valves installed on top of body for on-line maintenance.
Technical Specifications
Size Range: 2″ to 48″ (DN50 to DN1200)
Pressure Rating: Class 150LB to 2500LB (PN20 to PN420)
Temperature Range: -29℃ to +425℃
Body: A105 (carbon steel), LF2 (low-temperature carbon steel), F304/F316, F51 (duplex stainless steel), F53 (super duplex stainless steel), Inconel 625
Ball: F316, F51, F53, Inconel 625 with Stellite alloy coating (thickness ≥0.3mm, hardness ≥HRC 55)
Seat: PTFE, RPTFE, PEEK, Devlon V, 316 with Stellite hardfacing, Inconel 718 with tungsten carbide coating
Stem: F316, 17-4PH, Inconel 718, XM-19, hard chrome plated or nitrided surface
Gaskets: Metallic ring gaskets (soft iron, 304, 316, F5), lens gaskets (for high-pressure service)
Packing: PTFE V-type set, flexible graphite, low-emission graphite rings (compliant with ISO 15848-1)
End Connections: Butt Weld (BW, ASME B16.25), fully welded body (direct pipeline welding without ends)
Actuator Type: Multi-turn (gate valve type), part-turn (ball valve type)
Control Mode: On-off, modulating (4-20mA/0-10V), intelligent (local display, fault diagnosis)
Communication Protocols: Modbus RTU/TCP, Profibus DP/PA, HART, Foundation Fieldbus
Safety Functions: ESD emergency shutdown, Partial Stroke Test (PST), SIL 2/SIL 3
Design Standards: API 6D, API 608, ASME B16.34
Test Standards: API 6D, API 598
Applications
Natural Gas Long-Distance Pipelines:Mainline block valves, compressor station inlet/outlet valves, pig launcher/receiver valves, enabling remote monitoring and emergency shutdown to ensure pipeline safety.
District Heating Networks:High-temperature and high-pressure hot water or steam pipelines in thermal power plants, booster pump stations and heat transfer stations, withstanding temperature up to +350℃ and pressure up to 2.5MPa.
Oil Transmission Pipelines:Pump station inlet/outlet valves and tank farm isolation valves for crude oil and refined product pipelines, resistant to sour media and wax deposition.
LNG Receiving & Liquefaction:Low-temperature pipelines (-162℃) at LNG terminals, liquefaction plants and vaporizing stations, maintaining reliable sealing and operation under cryogenic conditions.
Coal Chemical & Chemical Industry:High-pressure syngas and hydrogen pipelines in coal-to-gas and coal-to-oil plants, resistant to high pressure and corrosive media.
Underground Gas Storage:Key shut-off valves for injection-production wells and gathering stations, resistant to high-pressure alternating loads and impure natural gas.
Advantages & Value
Intelligent Automation Integration:Electric actuators support full digital communication, connecting to SCADA/DCS systems for remote monitoring, fault diagnosis and predictive maintenance.
Safety & Compliance Assurance:ESD emergency shutdown, SIL safety certification, fire-safe and anti-static design, meeting functional safety regulations and insurance requirements.
Lower Total Cost of Ownership:Maintenance-free design reduces inspection and repair labor; intelligent diagnosis cuts unplanned downtime losses, delivering significantly lower 20-year TCO compared with split-body valves.
