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Double Eccentric Double Flange Butterfly Valve
Eccentric Butterfly Valve
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Double Eccentric Double Flange Butterfly Valve

Series: KF-SPD-F

Type: Eccentric Resilient Seated

Size: DN100-1200mm, NPS 4”-48”

Pressure Rating: PN10/PN16/PN25

Certificate: ISO, CE, WRAS, ACS

Sample: Available

Service: OEM & ODM

The Double Eccentric Double Flange Butterfly Valve is designed for reliable shut-off and control applications in demanding pipeline systems. It features a robust double-flange structure for easy installation between piping that conforms to ANSI/ASME or EN standards. Due to the duoble offset of the valve shaft, the rotational movement of the disc is eccentric relative to the seat. The first offset (1) moves the axis of rotation away from the sealing axis, achieving a complete circular seal between the body seat and the disc seat. The second offset (2) shifts the disc’s rotational axis away from the shaft, so the disc contacts the body seat only a few degrees before the valve is fully open.

When open, the disc completely disengages from the resilient soft seat, eliminating friction and wear during operation. This ensures low operating torque, extended seal life, and bidirectional sealing capability. The pressure-assisted sealing system guarantees a tight shut-off in both flow directions. The ductile iron double eccentric butterfly valve is coated internally and externally with Fusion Bonded Epoxy (FBE), providing excellent corrosion protection and making it especially suitable for drinking water and various industrial fluids (water, air, neutral gases, etc.). Key benefits include long service life, minimal maintenance requirements, and reliable performance in water supply, HVAC, irrigation, and general industrial applications. As a professional valve manufacturer in China, we supply high-quality double eccentric butterfly valves that meet international standards, catering to global procurement needs.

    Features

    Operation Cycles

    Over 50,000 times

    Leakage Level

    Bubbles-tight sealing with no leakage

    Eccentric Design

    Reduce valve seat wear and improve service life. 

    Valve stem anti blowout design

    Reduce maintenance difficulty and cost

    Bidirectional Sealing

    Any installation position

    Low Flow Resistance

    Improve fluid efficiency and reduce energy consumption

    Coating Grade

    Conventional and special conditions of C1-C5 & CX

    Certificates

    ISO9001, CE, WRAS, ACS

    Specifications

    Design Standard

    EN 593

    Top Flange Standard

    ISO 5211

    End Flange Standard

    EN1092 PN10 / PN16 / PN25

    Face to Face Dimension

    EN558-1 Series 13/14

    Testing Standard

    API 598, EN12266

    Temperature

    -20℃~120℃(depends on the sealing material)

    Body Material

    Ductile Iron

    Disc Material

    Ductile Iron, Stainless Steel

    Shaft Material

    Stainless Steel

    Seat Material

    EPDM, WRAS EPDM

    Ring Material

    Carbon Steel, Stainless Steel

    Operator

    Lever, Gearbox, Pneumatic, Electric Actuator

    Dimension

    13

    Size

    L

    T / Ф

    PN10

    PN16

    PN25

    Top Flange

    Series 13

    Series 14

    Ф D

    n - Ф d

    Ф D

    n - Ф d

    Ф D

    n - Ф d

    DN100

    127

    190

    11*11

    180

    8-19

    180

    8-19

    F07

    DN125

    140

    200

    14*14

    210

    8-19

    210

    8-19

    F07

    DN150

    140

    210

    14*14

    240

    8-23

    240

    8-23

    F07

    DN200

    152

    230

    17*17

    295

    8-23

    295

    12-23

    F10

    DN250

    165

    250

    19*19

    350

    12-23

    355

    12-28

    F10

    DN300

    178

    270

    22*22

    400

    12-23

    410

    12-28

    430

    12-28

    F10

    DN350

    190

    290

    22*22

    460

    16-23

    470

    16-28

    490

    16-28

    F10

    DN400

    216

    310

    27*27

    515

    16-28

    525

    16-31

    550

    16-31

    F14

    DN450

    222

    330

    27*27

    565

    20-28

    585

    20-31

    600

    20-31

    F14

    DN500

    229

    350

    36*36

    620

    20-28

    650

    20-34

    660

    20-34

    F14

    DN600

    267

    390

    46*46

    725

    20-31

    770

    20-37

    770

    20-37

    F16

    DN700

    292

    430

    63.35

    840

    24-31

    840

    24-37

    875

    24-37

    F25

    DN800

    318

    470

    63.35

    950

    24-34

    950

    24-41

    990

    24-41

    F25

    DN900

    330

    510

    75

    1050

    28-34

    1050

    28-41

    1090

    28-41

    F25

    DN1000

    410

    550

    85

    1160

    28-37

    1170

    28-44

    1210

    28-44

    F25

    DN1200

    470

    630

    105

    1380

    32-41

    1390

    32-50

    1420

    32-50

    F30

    Product display

    display double eccentric flange butterfly valve

    The rubber seated double eccentric flange butterfly valve features a key advantage: when the valve is opened, its disc swiftly detaches from the valve seat. This design effectively eliminates unnecessary over-compression and scratching between the disc and the seat, thereby reducing opening torque, minimizing wear, and extending the valve seat's service life. Widely applied in industrial pipelines across sectors such as metallurgy, power generation, petrochemicals, water supply, drinking water and drainage, and municipal engineering, ductile iron eccentric butterfly valve serves as a reliable fluid shut-off component.

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