Common materials used for triple offset butterfly valves in the oil and gas industry include:
Stainless steels
Stainless steels like 316 and 316L are popular choices for triple offset butterfly valves. They provide excellent corrosion resistance in oil and gas applications. Stainless steels can withstand a wide range of chemicals and temperatures.
Nickel alloys
Nickel alloys such as Hastelloy and Monel are used for triple offset butterfly valves when even higher corrosion resistance is needed. They are more expensive than stainless steels but can last much longer in harsh, erosive conditions.
Cobalt alloys
Cobalt alloys such as Stellite are sometimes used for the valve sealing surfaces where high wear and abrasion resistance is required. Cobalt alloys are harder and more durable than stainless steels alone.
Duplex steels
Duplex stainless steels such as Duplex 2205 offer a good combination of corrosion resistance and high strength. They are a cost-effective alternative for high-pressure triple offset butterfly valves.
Aluminium bronze
Aluminium bronze alloys are used for triple offset butterfly valves in some seawater applications. They provide excellent resistance to corrosion from saltwater along with good strength.
Carbon steel
For less corrosive applications, carbon steel triple offset butterfly valves can be used. The internal surfaces are plated or coated to resist corrosion. Carbon steel valves tend to be more affordable but have limited chemical resistance.
Other alloys
More exotic alloys such as titanium, Hastelloy C-276, and Zirconium are available for highly specialized applications. They offer superior corrosion resistance for handling the most aggressive media.
Triple offset butterfly valve factory use the most common materials for triple offset butterfly valves in oil and gas applications are stainless steels (316, 316L), duplex steels (2205), nickel alloys (Hastelloy, Monel) and cobalt alloys (Stellite). The material chosen depends on the specific corrosive and erosive nature of the media and operating conditions.
