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J-VALVES
Structural Features
Nickel‑Aluminum Bronze C95500 Material:It delivers outstanding seawater‑corrosion resistance, exceptional resistance to seawater erosion‑corrosion and cavitation erosion, excellent anti‑biofouling performance to cut down marine organism deposits, satisfactory thermal conductivity and hot‑crack resistance.
Two‑Piece Body Design:The valve body consists of bolt‑connected left‑hand and right‑hand sections. Featuring compact layout and lightweight construction, it permits on‑site inspection, maintenance and replacement of internal components including balls and seats without detaching the whole valve from pipelines, hence shortening system downtime.
Floating‑Ball Structure:The ball is free to drift under medium pressure and presses tightly against valve seats for dependable sealing. Sealing force comes from seat preload under low‑pressure conditions, while medium‑pressure‑boosted sealing capacity realizes self‑energized sealing at high pressure. This configuration boasts simple structure and stable sealing performance.
Flanged End Connection:RF (Raised‑Face) flanged ends comply with ASME B16.5 specifications. The Class 150 pressure rating guarantees installation stability and sealing property under low‑pressure working conditions and facilitates integration with existing piping systems.
Full‑Port Design:The bore diameter of the floating ball matches the inner diameter of pipelines. It maximizes flow capacity, minimizes pressure drop, eliminates fluid stagnant zones and simplifies pipeline cleaning and servicing.
Fire‑Safe Construction:Designed in compliance with API 607 standard, it adopts metal‑to‑metal contact as the backup fire‑safe sealing pair. The valve can sustain sealing performance and prevent medium leakage even in fire accidents.
Anti‑static Device:Built‑in anti‑static springs and steel balls conduct static electricity among the ball, stem and valve body, lowering fire and explosion hazards.
Blowout‑Proof Valve Stem:The bottom‑mounted blowout‑resistant stem is fitted with shaft shoulders and retaining rings. It stops the stem from being blown‑off by abnormal internal pressure and safeguards operational safety.
ISO 5211 Top Mounting Flange:The stem top is equipped with ISO 5211 standard flanged interfaces (F07 / F10). Pneumatic actuators, electric actuators and manual gearboxes can be directly installed to support remote and automated operation.
Low‑Torque Optimized Structure:Combined with self‑lubricating bearings and optimized flow‑passage profile, the floating‑ball setup cuts operating torque and extends the service life of driving actuators.
Optional Special Surface Treatments:Electrolytic polishing, sand‑blasting and anti‑fouling coating treatments are available for enhanced seawater corrosion resistance and marine‑organism adhesion inhibition.
Technical Parameters
Nominal Size: 4" (DN100)
Pressure Rating: Class 150 (PN20)
Operating Temperature Range: ‑196℃ ~ +200℃
Body & Bonnet Material: ASTM B148 C95500 (nickel‑aluminum bronze), C95800 (aluminum bronze), C95200 (aluminum bronze)
Ball Material: C95500, C95800, C95500 with ENP (Electroless Nickel Plating), F316 stainless steel (upon special request)
Valve Stem Material: C95500, C95800, F316, Monel K500, 17‑4PH
Seat Seal Material: PTFE, RPTFE (Reinforced PTFE), Nylon, PEEK
O‑ring Material: EPDM, FFKM (Perfluoroelastomer)
Packing Material: PTFE, flexible graphite
Gasket Material: Non‑asbestos fibre gasket, PTFE‑jacketed gasket, flexible graphite spiral‑wound gasket
End Connection: RF flanged connection (ASME B16.5); RTJ flange optional; NPT/BSP threaded ends and SW (Socket‑Weld) ends on request
Operation Type: Manual (hand lever / worm‑gear drive), pneumatic (double‑acting / single‑acting spring‑return), electric, hydraulic actuation
Design Standards: API 608, ASME B16.34
Inspection & Test Standard: API 598
Application Fields
Shipboard Seawater Systems:It provides reliable isolation and flow regulation for seawater cooling, ballast‑water, fire‑water, bilge‑water and deck‑wash piping systems and endures long‑term seawater corrosion.
Offshore Engineering Platforms:Applicable for seawater lifting, cooling, fire‑protection and utility systems on offshore oil platforms, FPSOs and drilling vessels.
Port and Dock Facilities:Controls seawater and fresh‑water pipelines for cargo‑handling, vessel water‑supply and fire‑fighting systems in harbour installations.
Subsea Pipeline Systems:Serves as shut‑off and regulating equipment for subsea water‑transport and water‑injection pipelines under high‑pressure corrosive seawater environments.
Marine Chemical Industry:Deployed in seawater desalination, seawater bromine extraction and brine handling pipelines for marine chemical plants.
General‑Purpose Marine Service:Suitable for dependable isolation of highly corrosive media such as seawater, brackish water and high‑salinity underground water as critical process control hardware for marine‑based facilities.
Advantages and Core Values
Premium Seawater‑Corrosion Resistance:C95500 nickel‑aluminum bronze contains 5 % nickel to generate a dense passive oxide film. Its seawater corrosion rate is merely 1/50 of carbon‑steel, delivering far longer service life than conventional bronze and stainless‑steel alloys.
Powerful Anti‑Biofouling Capacity:Copper‑base alloys naturally restrain the attachment of marine organisms, reduce biological fouling, and cut maintenance‑cleaning cycles and energy consumption.
Light‑Duty and Dependable Operation:The floating‑ball design features low operating torque for effortless manual actuation and frequent on‑off cycles. Its self‑energized sealing ensures zero‑leakage performance across the full pressure spectrum.
Convenient Installation and Maintenance:The two‑piece split body allows internal‑part replacement without pipeline dismounting. Flanged ends simplify installation and overhaul, and its compact profile reduces pipeline support expenses.
Effortless Automation Integration:The ISO 5211 standardized top flange matches pneumatic and electric actuators, enabling remote monitoring and automated operation on offshore platforms.
Wide‑Ranging Working Compatibility:Multiple bronze grades, sealing combinations and surface‑finish choices accommodate extensive marine working conditions ranging from cryogenic to high‑temperature service and from clean seawater to sediment‑laden salt‑water.
