Double Eccentric Double Flange Butterfly Valve
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

|
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 |
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.











