CD4MCu Butterfly Valve, API 609, 4 IN, CL 150, Triple Offset

Triple Eccentric Butterfly Valve

Valve description: Butterfly valve, triple eccentric, metal laminate seat, uni-directional, cast super duplex stainless steel

Body material: CD4MCu
Disc material: CD4MCu
Nominal diameter: 4 Inch (DN100)
Nominal class: Class 150 LB (PN20)
End connection: Wafer
Metal seat: Duplex 2205 + graphite
Standard: API 609
Face to face: API 609
Mode of operation: Gear
Test and inspection: API 598

CD4MCu Duplex Steel butterfly Valve manufacturer, factory and supplier. CD4MCu Duplex Steel butterfly valves belong to a type of duplex stainless steel butterfly valve. They are composed of Cr26Ni6 alloy with added copper and molybdenum elements to regulate the carbon content, ensuring excellent corrosion resistance. Typically, solid solution treatment is recommended for optimal performance. The yield strength of CD4MCu Duplex Steel butterfly valves is comparable to that of austenitic counterparts, and the alloy offers satisfactory hardness, toughness, and strength. These valves are suitable for use in corrosive environments.

Chemical Composition of CD4MCu Duplex Steel Plug Valve:

Carbon (C): ≤ 0.04
Manganese (Mn): ≤ 1.0
Silicon (Si): ≤ 1.0
Phosphorus (P): ≤ 0.04
Sulfur (S): ≤ 0.04
Chromium (Cr): 24.5 - 26.5
Nickel (Ni): 4.75 - 6.00
Molybdenum (Mo): 1.75 - 2.25
Copper (Cu): 2.75 - 3.25

Three eccentric laminate hard seal flange butterfly valve is a long-life, energy-saving butterfly valve. Its structure adopts the three-dimensional core principle design, the valve seat adopts the laminate stainless steel with graphite structure of hard and soft sealing compatibility, with exquisite processing and advanced technology. This product is composed of valve body, butterfly disc, laminate seal as valve seat, valve stem, transmission mechanism and other main components. It is widely used in metallurgy, electric power, petroleum, chemical industry, air, gas, combustible gas and water supply and drainage pipeline.

Triple Eccentric Butterfly Valve-Features

There are three eccentrics (offsets): the first eccentric, the shaft deviated from the centerline of sealing face; The second eccentric, the shaft deviated from the centerline of pipe and valve; The third eccentric the distinctive included angle between oblique taper angle of eccentric seat and centerline of pipe, thus making seat completely disengaged from the sealing ring during the whole process of open and close. This structure not only uses cam effect, but also eliminates the possibility of abrasion and leakage.




1. Elastic property of composite metal sealing ring to perform zero leakage.
2. Torque seal to ensure two -way zero leakage.
3. STL one piece hard surface seat may be adapted to many working conditions, which is featured by long service life and easy maintenance.
4. One piece cast body, face to face dimensions conforming to ISO 5752, ASME B16.10 and API 609, replacement to high performance butterfly valves and other types of valves, easy and flexible installation.
5. Intrinsically fireproof property thanks to all metal structure and leak tight performance.
6. Anti-blowout stem for high dependability, completely conforming to API 609
7. The stem of triple eccentric butterfly valve is a shaft, and the stem and disc are connected by key or pin-key combination.

Triple Eccentric Butterfly Valve-Specifications and Materials

1. Design: API 609, ASME B16.34, AWWA C504, BS EN 593
2. Face to Face: API 609, AWWA C504, BS 2080, and ISO 5752
3. Flange End: ASME B16.5, ASME B16.47, BS EN 1092, ISO 7005, GOST
4. Inspection Test: API 598, BS EN 12266, ISO 528
5. Materials Choose Body Materials: Carbon Steel ASTM A216 WCB, WCC, Low Temperature Carbon Steel ASTM A352 LCB, A352 LCC, A352 LC1, A352 LC2; Alloy Steel Chrome Moly ASTM A217 WC6, A217 C5, A217 WC5, A217 C12, A217 C12A, A217 WC9, 1.7335, 1.7380, 1.7362, 1.7386, 1.4903; STAINLESS STEEL ASTM A351 CF3, A351 CF8, A351 CF3M, A351 CF8M, A351 CF8C, 1.4301, 1.4306, 1.4401, 1.4404, 1.4550, 1.4438; ALLOY 20 ASTM A351 CN7M, N08020, 1.4438; DUPLEX STEEL 2205 ASTM A351 CD3MN, A890 2205, S31803, 1.4462; SUPER DUPLEX STAINLESS STEEL ASTM A351 CD4MCu, A890 5A, S32750, 1.4501; SUPER DUPLEX F55, ASTM A995 CD3MWCuN, S32760
6. Disc Materials: ASTM A216 WCB, WCC, ASTM A352 LCB, ASTM A351 CF8M, CF3M, CF8, CF3, ASTM A890 4A, 5A, ALLOY 20, Duplex Stainless Steel, Monel, Hastelloy Steel
7. Seat Materials: SS 304 + Graphite, SS 316 + Graphite, PTFE
8. Pressure Range: PN10, PN16, PN25, PN40, PN63, PN100, 150 LB, 300 LB, 600 LB, 900 LB (PN10-PN100, Class 150-900 LB)
9. Size Range: DN50-DN3200, 2 Inch - 128 Inch
10. Drive Mode: Manual/Worm gear/Electric/Pneumatic
11. Field of Application: Electric /Hydraulic/Municipal Engineering etc; Water/Sea water/Gas etc.