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J-VALVES
Design Features
Nickel-Aluminum Bronze Material:The valve body is made of ASTM B148 C95500 nickel‑aluminum bronze (CuNiAlFe), containing approximately 4.5% nickel and 10% aluminum. It provides excellent resistance to
seawater corrosion, cavitation corrosion, erosion and biofouling, with mechanical strength close to carbon steel, suitable for seawater, salt spray and chloride‑containing environments.
Two-Piece Design:The valve body consists of left and right sections, featuring a simple and compact structure for easy manufacturing, assembly and internal maintenance, reducing downtime and maintenance costs.
Floating Ball Design:The ball can float freely under medium pressure and tightly contacts the downstream seat to achieve reliable sealing. It delivers excellent sealing performance under low-pressure conditions with a simple and dependable structure.
Reduced Bore (2x1 1/2"):The valve end connection is 2 inches (DN50) with an internal flow passage of 1.5 inches (DN40). This design reduces valve weight, material consumption and operating torque while meeting most general flow control requirements, offering better economy than full-port designs.
Flanged Connection:RF (Raised Face) flanged connection conforming to ASME B16.5, pressure class 150LB
(PN20), providing high installation compatibility and stable sealing.
Anti-Static Device:Built-in anti-static spring/steel ball structure conducts static electricity between the stem and body, and between the ball and body, preventing safety hazards caused by static accumulation.
Blowout-Proof Stem:The stem is designed with a lower anti‑blowout shoulder, preventing the stem from being blown out by abnormal overpressure inside the valve and ensuring operational safety.
Lever Operation:Standard lever operator enables 90° quick opening and closing with simple and intuitive operation. A locking device can be fitted to prevent misoperation, ideal for frequent operation and local control applications.
Compact and Lightweight:The 2-inch nickel‑aluminum bronze construction results in a moderately sized, lightweight valve, easy to install in space‑restricted areas such as ship compartments, offshore platform pipe racks and skid‑mounted equipment.
Biofouling Resistance:The C95500 surface discourages marine organism attachment, reducing clogging and corrosion caused by biofouling and lowering maintenance frequency.
Technical Parameters
Nominal Size: 2x1.5 (DN50xDN40)
Pressure Class: 150LB (PN20)
Temperature Range: -29℃ to +425℃
Body/Bonnet: ASTM B148 C95500 Nickel-Aluminum Bronze (Cu-10Al-4.5Ni-4Fe)
Ball: C95500 with hard chrome plating, or Monel alloy (optional)
Stem: 316 Stainless Steel or Monel K500
Seat: PTFE, RPTFE, PPL (reinforced PTFE); special compound available for seawater service
Sealing Materials: PTFE/RPTFE/PPL (seat); flexible graphite or PTFE (stem packing)
Bolting: 316 Stainless Steel or Monel to prevent galvanic corrosion
End Connection: Flanged (RF Raised Face, ASME B16.5)
Operation: Lever (90° open/close, optional locking hole), worm gear, pneumatic, electric (optional)
Design Standard: ASME B16.34, API 608
Inspection & Test Standard: API 598
Face-to-Face Dimension: ASME B16.10
Applications
Shipbuilding & Offshore Engineering:Piping control for seawater cooling systems, ballast water systems, fire fighting systems and bilge water systems, resisting seawater corrosion and salt spray environments.
Seawater Desalination:Seawater intake and brine discharge lines for reverse osmosis, multi‑stage flash distillation and other desalination plants.
Coastal Power Plants:Circulating cooling water, seawater flue gas desulfurization, and seawater intake/discharge systems, resisting chloride and microbial corrosion.
Offshore Platforms:Seawater lifting, cooling, fire fighting and utility piping on production and drilling platforms.
Chemical & Salt Chemical Industry:Highly corrosive environments such as concentrated brine, bittern and chloride‑containing media.
General Industrial Service:On/off control for water, weakly corrosive chemicals, gases and other media, especially suitable for marine and high‑chloride environments.
Advantages & Value
Excellent Seawater Corrosion Resistance:C95500 nickel‑aluminum bronze provides far better corrosion resistance in seawater than carbon steel and stainless steel, free from pitting, crevice corrosion and stress corrosion cracking. Service life exceeds 20 years, significantly reducing replacement costs in marine environments.
Cavitation & Erosion Resistance:High hardness and good wear resistance of aluminum bronze withstand cavitation corrosion and solid particle erosion caused by high‑velocity seawater flow, suitable for pump outlets and throttling locations.
Anti-Biofouling:Low marine organism attachment reduces clogging and corrosion, cutting cleaning and maintenance frequency as well as chemical treatment costs.
Economical & Practical:Reduced bore design lowers material consumption; 150LB low-pressure class covers most general applications, delivering outstanding cost‑performance among seawater‑resistant valves.
Balanced Strength & Corrosion Resistance:Tensile strength of C95500 exceeds 550MPa, approaching carbon steel, with superior corrosion resistance and no need for extra wall thickness allowance.
Easy Operation:90° lever operation is intuitive with low operating torque; locking device prevents misoperation, suitable for frequent local operation on ships and platforms.
Reliable Sealing:Simple and effective floating ball self‑energized sealing, combined with high‑performance PTFE/RPTFE seats, ensures long‑term leak‑tight service.
Convenient Maintenance:Two-piece construction with top-entry design allows inline replacement of seats and packing. Corrosion-resistant nickel‑aluminum bronze minimizes body replacement, reducing lifecycle costs.
