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What materials are used for butterfly valves?

Release time:

2024-11-27

Gray cast iron is suitable for nominal pressure PN ≤ 1.0 MPa, with a temperature range of -10℃ to 200℃ for media such as water, steam, air, gas, and oil products.

　　Common materials for butterfly valves include the following:
　　Gray cast iron
　　Gray cast iron is suitable for nominal pressure PN≤1.0MPa, with a temperature range of -10℃ to 200℃ for water, steam, air, gas, and oil products.
　　Common grades of gray cast iron: HT200, HT250, HT300, HT350.
　　Ductile iron
　　Suitable for nominal pressure PN≤2.5MPa, with a temperature range of -30 to 300℃ for water, steam, air, and oil products.
　　Common grades: KTH300—06, KTH330—08, KTH350—10.
　　Acid-resistant high-silicon ductile iron
　　Suitable for nominal pressure PN≤0.25MPa, with temperatures below 120℃ for corrosive media.
　　Carbon steel
　　Suitable for nominal pressure PN≤32.0MPa, with a temperature range of -30 to 425℃ for water, steam, air, hydrogen, ammonia, nitrogen, and petroleum products.
　　Common grades: WC1, WCB, ZG25, and quality steels 20, 25, 30, and low alloy structural steel 16Mn.
　　Copper alloy
　　Suitable for PN≤2.5MPa for water, seawater, oxygen, air, oil products, and steam media with temperatures from -40 to 250℃.
　　Common grades: ZGnSn10Zn2 (tin bronze), H62, Hpb59—1 (brass), QAZ19—2, QA19—4 (aluminum bronze).
　　High-temperature copper
　　Suitable for nominal pressure PN≤17.0MPA and temperatures ≤570℃ for steam and petroleum products.
　　Common grades: ZGCr5Mo, 1Cr5Mo, ZG20CrMoV, ZG15Gr1Mo1V, 12CrMoV, WC6, WC9, etc.
　　Low-temperature steel
　　Suitable for nominal pressure PN≤6.4Mpa and temperatures ≥-196℃ for ethylene, propylene, liquefied natural gas, liquid nitrogen, and other media.
　　Common grades: ZG1Cr18Ni9, 0Cr18Ni9, 1Cr18Ni9Ti, ZG0Cr18Ni9.
　　Stainless acid-resistant steel
　　Suitable for nominal pressure PN≤6.4Mpa and temperatures ≤200℃ for nitric acid, acetic acid, and other media.