Nickel Aluminium-bronze valves are suitable for many seawater applications, especially in low-pressure applications. The most common valve in NAB is the large butterfly valves which offer come with a NAB body and monel trim, which far cheaper substitute for full Monel valves.
The fact that NAB is
cost-effective (cheaper than the exotic alternatives);
long-lasting (comparable in performance on general corrosion, pitting and cavitation to super duplex alloys and significantly better than the standard alloys)
a good valve material (does not gall, has excellent anti-fouling properties and is a good thermal conductor), makes it an excellent choice for valves in seawater service.
NAB butterfly valves have been used extensively for seawater service for many years and are widely recognized to be an excellent solution.
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