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Duplex butterfly valves have good corrosion resistance and high strength performance because of their material character. So-called “duplex stainless steel” is the ferrite and the austenite probably respectively occupies in its melting organization one half. Even a small amount not less than 30% as well. Because the duplex stainless steel has the ferrite and the austenite elements, therefore it has merits that high intensity and bears the chloride stress corrosion performance which the ferritic stainless steel has, and fine tough and welding performance which the austenite stainless steel has.
Duplex steel valve’s anti-chloride pitch corrosion, the slit corrosion and the stress corrosion performance are extremely superior, and the mechanical strength is high, bears weary and the attrition corrosion property is good, these merits which stainless steel all are unable to compare.
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Hastelloy B series valves corrosion resistance feature: It has the good corrosion resistance performance in the reducible sour medium and so on the hydrochloric acid, sulfuric acid, phosphoric acid.
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Inconel is a “super alloy” material that is sometimes used for exhaust valves because of its superior high-temperature strength. Inconel the nickel content in the alloy is much higher than that of stainless steel, the corrosion resistance of alkali sulfide is better that of stainless steel, and the corrosion resistance of high temperature is better.
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Monel butterfly valves corrosion resistance feature: It has an excellent anti-corrosion performance in the reducing acid medium, and resistant to any density of hydrofluoric acid solution corrosion.
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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.
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極度で粗い腐食性の媒体のそのパイプライン弁の長期安全な、信頼できる、安定した操作を保障するニッケルの蝶弁。.
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Stainless steel butterfly valves bringing light weight to applications with low cost, jst High performance butterfly valves from 2″ to 100″.
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スーパーオーステナイト系ステンレス鋼の耐食性は、合金含有量が多いため、二相鋼よりも高い。.
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耐腐食性（特に硫酸）と耐熱性から化学産業で使用されるタンタルは、150℃以下では酸の化学的攻撃をほとんど受けない。.
グレード: Ta, Ta pur ( 99.85 % min), Ta-2, 5%W (KBI 6); Ta-10%W (KBI 10)
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JST titanium butterfly valves can be available in casting or forging type. Recently JST supplied lots forging titanium butterfly valves for mining and desalination.Titanium Butterfly valves come typically in wafer or lug style. However it is no uncommon to see a flanged butterfly valves in high performance applications.JST titanium butterfly valves normally use common titanium Grade 2, Gr.3, Gr.5, Gr.7, Gr.12.
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ジルコニウムは貴金属であり、価格は比較的高価である。しかし、そのユニークな物理学と化学耐食性性能の結果として、それは原子力産業、航空、民間航空、化学工業上のドメインアプリケーションなどで代替することはできませんように。パイプラインの安全技術に広く使用され、長期的な安定性と信頼性の高い動作を保証します。.
