Nickel Aluminum Bronze Ball Valves of Weidouli own excellent corrosion resistance, being a suitable and far cheaper substitute to monel for many seawater applications. Nickel Aluminum Bronze ball valves 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.
The advantages of NAB ball valves are significant. They are particularly suitable for seawater service, where the corrosion properties, especially their resistance to chloride pitting, are excellent. The technology for producing castings of consistent quality is well known, and there is little need for the extensive non-destructive testing that is required for 6Mo, duplex and super duplex steels.
Mechanically, NAB ball valves are comparable to other popular corrosion-resistant alloys, but in order to take full advantage of these properties, specially defined pressure-temperature ratings must be used. Excellent occlusal and wear properties help to ensure the longevity and good performance of NAB ball valves.
The limitations of the NAB ball valves are that it should not be used in a sulphide environment and its flow limits must be considered. Competing cast iron and steel valves require some form of protection to compete and even then the quality and durability of this protection determines longevity. Stainless steel valves are subject to severe crevice corrosion and pitting in seawater, and 6Mo, duplex and super duplex stainless steel valves are limited to a temperature of 20 ℃ and a maximum chlorine content in seawater service. The cost of the more exotic higher alloys becomes a key factor and requires a special justification.
Coal chemical industry
Pulp &Paper making industry