There are various kind of material available for butterfly valve to suit the requirement of different application, such as A216 WCB, A216 WCC, A217 WC6, A217 WC9 and so on. According to our rich experience and industry needs, we select proper material to produce butterfly valves. Currently, we mainly supply stainless steel butterfly valve and cryogenic butterfly valve. You may click the product to get more details.
A216 WCB, A216 WCC are commonly used material for butterfly valve body and disc, they are suitable for water, oil, gas, steam, and other non-corrosive media, some times they can also be used for sour service after disposing of NACE MR-01-75 or NACE MR-01-03 and consider corrosion allowance in. It should be noticed that they are not suitable for low-temperature below -29℃ and high-temperature over 425℃.
A217 WC6, A217 WC9 are usually used for the high-temperature application, usually, the medium is high-temperature steam or hot air, for such application, the valve is with metal to metal seat or SS+Graphite seat ring. In order to achieve tight shut-off, these valves are usually of a triple eccentric design.
A352 LCB, A352 LCC are usually used for the low-temperature application, usually, the medium is of low-temperature but over -46℃ or the valve is installed outdoor in the area of a cold environment. But these materials can not be used for high-temperature over 345℃.
A351 CF8, A351 CF8M, A351 CF3, A351 CF3M, these austenitic stainless steel are anti-rust and anti-corrosion, suitable for the medium of various kinds of acid. They also perform great for low-temperature and high-temperature application but the cost of them is much higher than carbon steel.
Aluminum-bronze like B148 C95500, B148 C95800 are perfectly suitable for seawater application. Al-Bronze butterfly valve is widely used in the offshore applications and seawater pipelines. Because the cost of it is high, big size butterfly valve usually uses it as a disc material for centerline design.
Duplex Steel A890 4A, A890 5A, SAF2205, S31803 and super duplex steel A890 6A, SAF2507, S32750 have similar application range of Al-Bronze, they have good resistance to chloride corrosion, so they are widely used for seawater application and produced water application.