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J-VALVES
A105N Forged Steel Body: The valve body is produced from ASTM A105N forged steel with dense grain structure, outstanding mechanical property and superior pressure bearing capacity to adapt to high-pressure working conditions.
Integrally Forged Large Bore Body: The 12-inch DN300 large-size body adopts integral forging craft to remove potential casting defects and guarantee uniform wall thickness and integral structural stability.
Straight-Through Flow Path Design: Fluid flows linearly along the central line of valve seat with low flow resistance and small pressure drop, fit for working conditions needing accurate flow adjustment.
Rising Disc Structure: The disc lifts vertically along the central axis of valve stem, causing slight abrasion on sealing surfaces and tight shutoff, achieving linear flow adjustment performance.
Flanged Connection: Equipped with RF raised face flange connection conforming to ASME B16.5 standard, ensuring stable installation and good tightness for large-caliber pipeline systems.
Pressure-Seal Bonnet: Pressure-seal bonnet is adopted for Class300 high pressure service. Higher medium pressure brings better sealing effect to effectively avoid external medium leakage.
Stellite Hard Alloy Overlay Sealing Surface: Both seat and disc sealing surfaces are hardfaced with Stellite alloy, featuring great wear and corrosion resistance to prolong valve service life.
Backseat Structure: When the valve is fully opened, the disc forms metal sealing with bonnet backseat, allowing on-site packing replacement and preventing medium leakage outward.
Anti-Blowout Stem Design: The bottom of valve stem is fixed by T-type head or pin structure to prevent stem blowout under internal medium pressure and guarantee safe operation.
Handwheel & Bevel Gear Operation: Standard bevel gear device is matched for 12-inch large bore to lower operating torque for easy opening and closing; electric actuator is optional to realize remote automatic control.
Technical Specifications
Item | Specification |
Nominal Size | 1/2"~12" (DN15 ~ DN300) |
Pressure Class | 150LB~2500LB (PN10~PN420) |
Operating Temperature | -29℃ ~ +425℃ (Standard Version); up to +538℃ for high-temperature variant |
Body Material | ASTM A105N Forged Carbon Steel |
Disc & Seat | ASTM A105N base with Stellite hardfacing overlay |
Stem Material | ASTM A182 F6a Stainless Steel |
Seat Face Type | FF (Flat Face) / RF (Raised Face) |
End Connection | RF Flanged per ASME B16.5 |
Operation | Manual (Bevel Gearbox), Electric, Pneumatic |
Design Standard | ASME B16.34, API 602 / API 623 |
Test Standard | API 598, ISO 5208 |
Face-to-Face Dimension | In accordance with ASME B16.10 |
End-to-End Length | Approx. 660mm (Long Pattern per ASME B16.10) |
Applicable Media | Water, Steam, Oil Products, Natural Gas and various chemical process fluids |
Oil & Gas Industry: Used for fluid cut-off and flow regulation on long-distance transportation pipelines, oil and gas gathering pipelines, compressor stations and metering stations.
Petrochemical Industry: Control high temperature and high pressure medium inside refinery equipment, cracking units and catalytic reforming devices.
Power Generation Industry: Serve for shut-off and flow adjustment on main steam pipeline, feedwater pipeline and bypass pipeline of thermal power plants.
Chemical Industry: Medium control for high-pressure production units including synthetic ammonia and methanol processing facilities.
Metallurgical Industry: Safe isolation for high-temperature high-pressure pipelines carrying blast furnace gas and industrial oxygen.
District Heating Industry: Main pipeline flow regulation and emergency shutoff for centralized heating network.
Excellent High Pressure Large Bore Safety Performance: Integral forging and A105N raw material greatly improve overall structural stability of 12-inch valve under Class300 pressure, ruling out equipment failure risk caused by casting defects.
Accurate Flow Modulation Capacity: Straight flow channel and rising disc design deliver stable adjusting property, ideal for process pipelines requiring precise flow control.
Long Service Life of Sealing Parts: Stellite hard surfacing effectively resists medium erosion and corrosion, lengthening maintenance cycle and cutting overall operating cost.
Multi-layer Safety Protection: Pressure-seal bonnet, backseat and anti-blowout stem jointly protect equipment and operators during high-pressure running.
Easy Field Maintenance: Flanged connection and replaceable seat design shorten overhaul duration and reduce production shutdown loss.
Universal Standardization: Full compliance with global ASME and API standards enables seamless matching with existing pipeline, saving engineering design and purchasing expense.
