VALVA Nickel-Aluminum Bronze valves are the industry standard for marine and seawater applications. Known for their exceptional mechanical strength and natural resistance to biofouling, NAB valves offer a reliable, cost-effective alternative to high-alloy steels in desalination, offshore, and naval engineering.
Why Choose Nickel-Aluminum Bronze?
The addition of nickel, iron, and manganese to the aluminum bronze matrix creates a high-performance alloy with unique benefits:
- Superior Seawater Resistance: NAB is specifically engineered to resist cavitation, erosion, and general corrosion in high-velocity seawater.
- Natural Anti-Biofouling: The copper content in the alloy provides a natural resistance to the growth of marine organisms (such as barnacles and algae), maintaining clear flow in intake systems.
- Excellent Toughness: It maintains high impact strength even at low temperatures and offers better weldability compared to standard brass or bronze.
- Cost-Effectiveness: Provides a long service life in seawater desalination projects at a lower price point than Super Duplex or Nickel alloys.
Major Application Fields
- Desalination Plants: Critical for seawater intake, brine circulation, and high-pressure pump discharge.
- Marine & Naval: Used extensively for ship propellers, pumps, and hull valves due to its resistance to cavitation.
- Offshore Platforms: Reliable firewater systems and cooling water piping in saline environments.
- Power Plants: Cooling systems utilizing seawater as the primary coolant.
Material Grades & Global Standards
We specialize in the high-grade C95800 alloy, ensuring it meets all international pressure and casting standards:
| Material Type | ASTM Grade | UNS Designation | Cast Equivalent |
| Nickel-Alu Bronze | ASTM B148 | C95800 | Alloy 958 |
| Mechanical Properties | High Tensile | High Yield | Superior Elongation |
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