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J-VALVES
Design Features
One-piece Forged Body:Valve body is integrally forged from high-quality forged steels including A105, F304, F316, F11, F22, F91, featuring dense grain structure, free from casting defects, with pressure-bearing capacity significantly higher than cast steel valves.
High Pressure & High Temperature Adaptability:Design pressure ranges from Class 150LB to 2500LB, and temperature range covers -29℃ to +650℃, meeting requirements of supercritical and ultra-supercritical power units.
Flanged & Welded End Design:RF (Raised Face), RTJ (Ring Type Joint) or BW (Butt-Weld) ends complying with ASME B16.5/B16.11 standards, ensuring reliable sealing under high pressure.
Rising Stem Structure:External or internal threaded rising stem design. Stem nuts are made of copper alloy or stainless steel, wear and corrosion resistant, with stable operating torque.
Disc Sealing Technology:Flat, conical or spherical disc available. Seat is Stellite alloy hardfaced, erosion and galling resistant, allowing in-line lapping and repair.
Guiding & Anti-Vibration Design:Double upper-and-lower disc guiding or cage guiding structure prevents vibration and noise under high pressure differential, ensuring long-term stable operation.
Packing Sealing System:Multi-layer flexible graphite packing or bellows seal design meets API 622 low-emission requirements. Zero-leakage bellows seal structure is optional.
Flexible Operation Modes:Handwheel (standard), impact handwheel, gearbox, electric actuator, pneumatic/hydraulic actuator, supporting automated control integration.
Position Indication & Locking:Standard stem stroke indicator. Opening indicator, limit switches and locking device are optional to comply with safety operation regulations.
Special Service Adaptation:Jacketed insulation structure, bellows seal, degreasing treatment for oxygen service, nuclear-grade cleanliness requirements, etc., are available upon request.
Technical Specifications
Size Range: 1/2″ to 4″ (DN15 to DN100)
Pressure Rating: Class 150LB to 2500LB (PN20 to PN420)
Temperature Range: -29℃ to +425℃
Body: A105 (carbon steel), F304/F304L, F316/F316L, F11 (1.25Cr-0.5Mo), F22 (2.25Cr-1Mo), F91 (9Cr-1Mo-V), F51 (duplex stainless steel), Inconel 625
Disc / Seat: A105 with Stellite hardfacing, F316 with Stellite hardfacing, solid carbide
Stem: F6a (410 stainless steel), F316, 17-4PH, Inconel 718, XM-19
Packing: Flexible graphite, graphite with nickel wire, PTFE, bellows (316L / Inconel)
Gasket: Spiral wound gasket (304/316 + graphite), metallic ring gasket (soft iron, 304, 316, F5)
End Connections: Flanged (RF/RTJ), Butt-Weld (BW), Socket-Weld (SW), Threaded (NPT)
Design Standard: ASME B16.34, API 602
Test Standard: API 598
Face-to-Face Dimension: ASME B16.10
Applications
Oil & Gas Industry:High-pressure gathering and transportation, long-distance pipelines, compressor stations, LNG liquefaction and receiving terminals, used for throttling, regulation and emergency shutdown.
Petrochemical Industry:High-pressure high-temperature reactor inlets and outlets, heat exchanger bypasses, hydrogen pipelines in hydrocracking, catalytic reforming, ethylene cracking and other units.
Coal Chemical Industry:High-pressure coal slurry pipelines, syngas cooling systems, black water pipelines in coal gasification plants, with excellent erosion and corrosion resistance.
Shipbuilding & Offshore Engineering:High-pressure production pipelines, water injection pipelines, fire fighting systems on FPSOs and offshore platforms.
Advantages & Value
Excellent Pressure Bearing Capacity：One-piece forged structure is free from casting defects such as blowholes and sand holes, with uniform wall thickness and high safety factor, suitable for high-pressure and alternating load conditions.
Outstanding Sealing Performance:Precision-machined disc and seat matching. Metal sealing achieves Class V leakage rate, soft sealing realizes zero leakage, complying with environmental and safety regulations.
Precise Flow Regulation:Globe valve features excellent inherent flow characteristic with an approximately linear relationship between opening and flow, superior to gate valves in regulation performance, ideal for process control.
Wide Material Selection:From carbon steel to nickel-based alloys, covering conventional to extreme corrosive services, meeting NACE MR0175/ISO 15156 requirements for sour service.
Safe & Reliable Operation:Blowout-proof stem, anti-static structure, fire-safe design (API 607) and low-emission packing provide multiple protections for personnel and equipment safety.
