wsv-valve
https://www.wsv-valve.com/products/nab-c95800-ball-valves.html
Nickel aluminum bronze valves of Weidouli own excellent corrosion resistance, being a suitable and far cheaper substitute to monel for many seawater applications. Nickel Aluminum Bronze ball valve are mainly composed of nickel and ferromanganese. With excellent corrosion resistance, Nickel Aluminum bronze ball valves act as an important material for marine propellers, pumps, valves and underwater fasteners, being widely used in seawater desalination and petrochemical industry.