 |
| Quantity: | |
|---|---|
J-VALVES
Design Features
Composite Material Structure:Valve body is integrally forged from forged steels such as A105 and F316, delivering high strength for pressure-retaining components. Trim parts including wedge and seat adopt C95500/C95800 nickel-aluminum bronze, providing excellent seawater corrosion resistance.
Nickel-Aluminum Bronze Trim:Contains 4%–5% nickel, 9%–11% aluminum and 3%–5% iron, with strength close to carbon steel. Its seawater corrosion rate is only 1/10 that of stainless steel, with outstanding cavitation resistance and erosion resistance.
Full Bore / Reduced Bore Optional:Standard full bore (FB) design features extremely low pressure drop and excellent pigging capability. Reduced bore (RB) design cuts cost and weight to meet economic requirements.
Resilient Wedge Sealing:Nickel-aluminum bronze wedge covered with NBR/EPDM, or solid nickel-aluminum bronze with soft sealing ring, realizes self-compensating sealing and bubble-tight zero leakage.
Flanged / Butt-Weld Connections:RF (Raised Face) and RTJ (Ring Type Joint) flanges conform to ASME B16.5; butt-weld (BW) ends are also available. Pressure ratings range from Class 150LB to 600LB.
Rising Stem Design:External threaded rising stem with stem nut made of nickel-aluminum bronze or stainless steel, resistant to seawater corrosion, with stable operating torque and visible open/close status.
Seat Hardfacing Technology:Seat sealing surface is Stellite alloy hardfaced or made of solid nickel-aluminum bronze, resistant to high-velocity seawater erosion and sediment abrasion, allowing in-line repair.
Anti-Corrosion Coating:Valve body exterior is coated with marine-grade epoxy coating or hot-dip galvanized, extending service life in buried or marine atmospheric environments.
Flexible Operation Modes:Handwheel (standard), impact handwheel, bevel gearbox, electric/pneumatic/hydraulic actuators, supporting remote control and automation integration.
Special Design Options:Extended stem (for buried / deep well installation), bypass balance hole (for large-bore high differential pressure), position indicator, locking device.
Technical Specifications
Size Range: 2″ to 24″ (DN50 to DN600)
Pressure Rating: Class 150LB to 600LB (PN20 to PN100)
Temperature Range: -29℃ to +425℃
Body: A105 (forged carbon steel), F316/F316L (forged stainless steel)
Wedge: Solid or covered C95800 nickel-aluminum bronze, C95500 nickel-aluminum bronze with rubber covering
Seat: C95800 nickel-aluminum bronze, A105 with Stellite hardfacing, F316 with Stellite hardfacing
Stem: F316 stainless steel, Monel K500, nickel-aluminum bronze
Stem Nut: C95800 nickel-aluminum bronze, aluminum bronze C63000
Packing: Flexible graphite, PTFE, synthetic fiber specially designed for seawater
Gasket: Spiral wound gasket (316 + graphite), metallic ring gasket
End Connections: Flanged (RF/RTJ), Butt-Weld (BW)
Design Standards: ASME B16.34, API 600, API 6D
Test Standard: API 598
Face-to-Face Dimensions: ASME B16.10, API 6D
Applications
Seawater Desalination Projects:Intake, high-pressure pump discharge, product water and brine pipelines in SWRO and MSF units, resisting high-salinity corrosion.
Coastal Power Plants:Seawater circulating cooling systems, condenser inlet/outlet, FGD flue gas heat exchangers, resisting chloride ion corrosion and microbial fouling.
Shipbuilding & Offshore Engineering:Ballast water, bilge water, cooling water and fire fighting systems, certified by classification societies including ABS, DNV, LR and BV.
Offshore Oil & Gas Platforms:Production water, water injection and utility seawater pipelines, resisting corrosion in marine atmospheric and splash zones.
Chemical & Chlor-Alkali Industry:Brine, wet chlorine gas, sodium hypochlorite, hydrochloric acid and other highly corrosive media, resisting pitting and crevice corrosion.
Marine Aquaculture & Environmental Protection:Seawater aquaculture systems, aquarium life support systems, coastal wastewater treatment plants, with low biofouling tendency and reduced chemical cleaning.
Advantages & Value
Optimal Balance of Corrosion Resistance and Strength:Forged steel body ensures high-pressure safety, while nickel-aluminum bronze trim solves seawater corrosion problems, avoiding the high cost of duplex stainless steel or titanium alloys.
Excellent Seawater Resistance:C95800 offers more than 10 times better corrosion resistance than 316 stainless steel in flowing seawater, with cavitation resistance close to duplex stainless steel, and service life of over 20 years.
Cost-Effective Solution:Cost reduced by 50%–70% compared with full titanium alloy or super duplex stainless steel valves, while performance meets most marine service requirements.
Reliable Bi-Directional Sealing:Resilient wedge automatically compensates for sealing surface wear; soft seal achieves zero leakage, and metal seal resists erosion, adapting to various operating conditions.
