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J-VALVES
Design Features
C95800 Nickel‑Aluminum Bronze Construction: The valve body is manufactured from ASTM B148 C95800 nickel‑aluminum bronze (Cu9Ni6Al4Fe4Mn), containing 8.5–9.5% nickel, 4.0–5.0% aluminum, 4.0–5.0% iron, and 0.8–1.5% manganese. It offers excellent seawater corrosion resistance, high resistance to cavitation and erosion corrosion, and effectively inhibits marine biofouling, making it suitable for long‑term immersion in seawater and medium‑ to high‑pressure marine environments.
90° Angle Design: Inlet and outlet ports are arranged at a 90° angle to redirect flow while fitting space‑constrained piping layouts. This reduces the need for elbow fittings, simplifies piping design, and lowers installation costs and space requirements.
Globe Valve Control Characteristics: The disc moves linearly along the centerline of the seat with a short stroke. When closed, the disc and seat sealing surfaces mate tightly for reliable shut‑off. In partial‑open positions, the annular throttling area between disc and seat enables precise flow control, ideal for regulating service.
Medium‑ to High‑Pressure Flanged Connections: The valve body is fitted with raised face (RF) flanges complying with ASME B16.5 Class 300. For the 3‑inch Class 300 configuration, flange outer diameter is 210 mm, bolt circle diameter 168.3 mm, 8 × M20 bolts, and flange thickness 28.6 mm, ensuring reliable joint integrity and sealing at 5.1 MPa.
Low Operating Torque: The stem nut uses friction‑reducing materials (copper alloy or self‑lubricating composite) with precision machined threads to minimize lifting friction. The 3‑inch size is lightweight for manual operation and can be equipped with small actuators.
Fire‑Safe Design: Complies with API 607. Graphite packing and metal sealing elements maintain sealing integrity under fire conditions to prevent media leakage.
Blowout‑Proof Stem: The stem is integrally forged and top‑mounted with anti‑blowout steps and sealing rings. Even if the packing gland loosens accidentally, the stem is retained by the bonnet for operational safety.
Graphite Packing Seal: The stuffing box uses flexible graphite braided packing or graphite ring assemblies. With a wide temperature range of −29°C to +500°C, it remains flexible at low temperatures and provides excellent self‑lubrication for long‑term reliable dynamic stem sealing.
Guide Ribs: Internal guide ribs in the valve body stabilize disc movement, prevent misalignment, ensure even loading of sealing surfaces, avoid sticking and scoring, and extend service life.
Anti‑Marine‑Fouling Design: The C95800 alloy forms a dense protective oxide layer that inhibits attachment of barnacles, algae, and other marine organisms. The streamlined disc design reduces fouling points and lowers maintenance frequency.
Compact & Lightweight Design: The 3‑inch angle valve has an approximate face‑to‑face length of 330 mm, height of 280 mm, and weight of 15–20 kg. It installs easily in space‑limited areas such as ship compartments and offshore platforms, reducing support structure costs.
Technical Parameters
Nominal Size: 3″ (DN80)
Pressure Class: 300LB (PN50)
Body Material: ASTM B148 C95800
Temperature Range: −29°C to +425°C (standard); −29°C to +200°C (high‑temperature option available)
Body/Bonnet: ASTM B148 C95800
Disc: C95800 with Stellite hardfacing (sealing surface) / full hardened treatment
Seat: C95800 with Stellite hardfacing (sealing surface)
Stem: Monel K500 / 316 stainless steel / C95800, seawater corrosion resistant
Packing: Flexible graphite braided packing / graphite rings / PTFE V‑rings
Gasket: Non‑asbestos fiber gasket / graphite spiral wound gasket / PTFE
Bolts: ASTM B193 B7M / 316 stainless steel (seawater corrosion resistant)
Nuts: ASTM B194 2HM / 316 stainless steel
End Connection: Flanged (RF), ASME B16.5 Class 300; optional NPT thread, socket weld, or marine‑standard flanges
Flange Facing Dimensions: ASME B16.5
Operation: Manual (handwheel / lever), pneumatic (linear stroke), electric (multi‑turn, on‑off / modulating), hydraulic
Design Standards: ASME B16.34, API 602, BS 1873
Testing Standard: API 598
Applications
Marine Seawater Systems: Used for flow regulation and shut‑off in 3‑inch medium‑ to high‑pressure shipboard systems including ballast water, bilge water, firewater, and cooling seawater. C95800 provides seawater corrosion resistance and anti‑fouling performance to meet classification society requirements.
Offshore Platform Engineering: Applied in seawater lifting, cooling, fire protection, and utility systems on offshore oil platforms, FPSOs, and drilling rigs. Resists dual corrosion from marine atmosphere and seawater immersion; angle configuration suits platform spatial layouts.
Seawater Desalination Plants: Used in high‑pressure pump discharge and energy recovery system lines for RO, MSF, and MED desalination processes. Withstands high‑salinity seawater and chemical cleaning media; Class 300 rating satisfies high‑pressure membrane desalination demands.
Marine Chemical Industry: Suitable for 3‑inch brine and concentrated seawater lines in salt production, bromine extraction, magnesium extraction, and similar processes, resisting high‑concentration salt solutions under medium‑ to high‑pressure conditions.
Subsea Equipment: Used in 3‑inch medium‑ to high‑pressure control lines for subsea valve manifolds, underwater pipelines, and ROV panels. C95800 withstands seawater pressure and corrosion for deepwater service.
General Industrial Service: Ideal for regulation and isolation of 3‑inch medium‑ to high‑pressure corrosive media including seawater, brackish water, and brine solutions, especially in marine and highly corrosive environments.
Advantages & Value
Medium‑ to High‑Pressure Seawater Corrosion Resistance: C95800 nickel‑aluminum bronze exhibits a corrosion rate in seawater only 1/50 that of carbon steel and 1/10 that of brass. A dense Al₂O₃·CuO protective film forms on the surface, resisting corrosion under long‑term immersion at Class 300 pressure with a service life exceeding 20 years.
Excellent Anti‑Biofouling Performance: The nickel‑aluminum bronze surface discourages marine organism attachment, reducing clogging by barnacles and algae. Maintenance intervals are extended by 3–5 times, lowering dry‑docking cleaning frequency and costs, especially for long‑immersion offshore installations.
Space‑Optimized Angle Configuration: 90° flow direction reduces piping elbows, adapts to confined installation spaces, and cuts pressure loss and installation costs by more than 30%.
Precise Flow Regulation: Globe valve design enables linear or equal‑percentage flow control, superior to the shut‑off‑only performance of gate valves, supporting automated process control.
Electrochemical Compatibility: Low galvanic potential difference with steel hulls and stainless steel pipelines ensures good compatibility with cathodic protection systems, avoids galvanic corrosion, enhances overall system reliability, and reduces corrosion protection costs.
Compact & Easy Installation: Weighing only 15–20 kg with a face‑to‑face length of approximately 330 mm, the 3‑inch angle valve installs flexibly in ship compartments and platform modules, reducing pipe rack and support costs by over 30%.
Light & Flexible Operation: Friction‑reduced stem nut design results in an operating torque below 25 N·m for the 3‑inch size, enabling single‑hand operation. Small pneumatic or electric actuators can be fitted for remote automated control.
Classification Society Certification Support: Type approvals available upon request from ABS, DNV, BV, CCS, and other leading classification societies, meeting marine and offshore classification requirements, shortening owner acceptance cycles, and enhancing project competitiveness.
