Double Flange Butterfly Valve EPDM Seat
Valve Type: |
Flange butterfly valve |
Structure: |
Concentric |
Standard: |
EN593 |
Workmanship: |
Investment casting |
Sealing direction: |
Bidirectional |
Sealing grade: |
Zero leakage |
Temperature: |
-20°C<T<120°C |
Operation: |
Handle/Lever |

① Thick shell, heavy-type
② High purity rubber, high wear resistance
③ Zero leakage standard
④ Various size in stock
Characteristics
Flanged butterfly valves distinguish themselves as a highly versatile fluid control solution, uniting cutting-edge structural design, exceptional operational efficiency, and uncompromising reliability across countless industrial scenarios. Their unique design fuses the key advantages of flanged end connections robust installation and high-pressure capability with the natural benefits of butterfly valve mechanics, including space-saving compactness and swift quarter-turn operation, making them a top choice for diverse industry needs.

Advantages
1. Simple structure, low cost:
Few components, simple processing and assembly technology, and simple structure means easy to understand and maintain.
2. Excellent bidirectional sealing performance (soft seal):
Under low pressure and normal temperature conditions, soft seals can achieve excellent sealing effects, and the leakage level can usually reach zero leakage (ANSI Class VI).
3. Extremely low flow resistance and high flow capacity:
The thickness of the butterfly plate is the only obstacle in the medium flow channel when the valve is fully opened, and it causes very little pressure drop on the medium. The advantages are obvious in systems that require maintaining smooth pipelines and reducing pumping energy consumption. Suitable for high flow applications, especially in water treatment, air conditioning water systems, water supply and drainage, and other high flow scenarios.
4. Small size, light weight, easy installation:
Compact design, compared to gate valves or globe valves of the same caliber, has a shorter structural length and much lighter weight.
Packing
Standard export wooden case packaging

Application Scenarios
Flanged butterfly valves are universally acclaimed for their compact configuration, lightweight construction, and cost-efficiency, solidifying their position as a preferred fluid control solution across diverse industrial sectors. The flanged end connections facilitate secure, leak-free installation through bolted fixation to compatible flanges, ensuring consistent and reliable performance across both low and high-pressure operating conditions.



Material
|
Body |
Plate |
Rotating Shaft |
Bushing |
Seat |
Operating Temperature (℃) |
|
Material Name |
Electroplated Nodular Cast Iron |
Material Name |
Material Name |
Material Name |
|
|
Ductile Iron |
Ductile Iron |
Stainless Steel |
PTFE |
EPDM Rubber |
-45~+135 Short-time -50~+150 |
|
Ductile Iron |
Stainless Steel |
Carbon Steel |
PTFE |
Hypalon |
-18~+135 Short-time -18~+149 |
|
Aluminum Bronze |
Titanium Steel |
EPDM Rubber |
-45~+135 Short-time -50~+150 |
||
|
Stainless Steel |
CF8M Stainless Steel |
Neoprene Rubber |
-7~+93 Short-time -7~+107 |
||
|
CF8M Stainless Steel |
Carbon Steel |
NBR Rubber |
-12~82 Short-time -12~+93 |
||
|
Carbon Steel |
CF8M Stainless Steel |
Abrasion-Resistant Rubber |
-10~+50 |
||
|
Fluororubber |
-23~+150 |
||||
|
Heat-Resistant EPDM Rubber |
-20~+150 |
||||
|
PTFE |
+10~+150 |
Dimension

|
DN |
L |
L1 |
D |
D1 |
H |
H1 |
b |
n-φd |
|||
|
mm |
inch |
|
|
PN1.0MPa |
PN1.6MPa |
|
|
|
|
PN1.0MPa |
PN1.6MPa |
| 50 | 2" | 108 | 180 | 125 | 125 | 150 | 326 | 83 | 20 | 4-φ18 | 4-φ18 |
| 65 | 21/2" | 112 | 180 | 145 | 145 | 165 | 344 | 93 | 20 | 4-φ18 | 4-φ18 |
| 80 | 3" | 114 | 180 | 160 | 160 | 200 | 363 | 100 | 22 | 4-φ18 | 8-φ18 |
| 100 | 4" | 127 | 180 | 180 | 180 | 220 | 396 | 114 | 22 | 8-φ18 | 8-φ18 |
| 125 | 5" | 140 | 180 | 210 | 210 | 250 | 421 | 125 | 24 | 8-φ18 | 8-φ18 |
| 150 | 6" | 140 | 180 | 240 | 240 | 280 | 453 | 143 | 24 | 8-φ23 | 8-φ23 |
| 200 | 8" | 152 | 270 | 295 | 295 | 335 | 578 | 170 | 26 | 8-φ23 | 12-φ23 |
| 250 | 10" | 165 | 270 | 350 | 355 | 405 | 638 | 198 | 26 | 12-φ23 | 12-φ28 |
| 300 | 12" | 178 | 380 | 400 | 410 | 455 | 731 | 223 | 32 | 12-φ23 | 12-φ28 |
| 350 | 14" | 190 | 380 | 460 | 470 | 525 | 783 | 270 | 36 | 16-φ23 | 16-φ28 |
| 400 | 16" | 216 | 450 | 515 | 525 | 580 | 888 | 300 | 38 | 16-φ28 | 16-φ31 |
| 450 | 18" | 222 | 480 | 565 | 585 | 640 | 958 | 340 | 40 | 20-φ28 | 20-φ31 |
| 500 | 20" | 229 | 480 | 620 | 650 | 705 | 1005 | 355 | 42 | 20-φ28 | 20-φ34 |
| 600 | 24" | 267 | 480 | 725 | 770 | 825 | 1128 | 410 | 48 | 20-φ30 | 20-φ36 |
| 700 | 28" | 292 | 640 | 840 | 840 | 920 | 1476 | 478 | 53 | 24-φ30 | 24-φ36 |
| 800 | 32" | 318 | 640 | 950 | 950 | 1020 | 1533 | 525 | 58 | 24-φ33 | 24-φ39 |
| 900 | 36" | 330 | 750 | 1050 | 1050 | 1120 | 1655 | 585 | 65 | 28-φ33 | 28-φ39 |
| 1000 | 40" | 410 | 850 | 1160 | 1170 | 1340 | 1765 | 640 | 76 | 28-φ36 | 28-φ42 |
| 1200 | 48" | 470 | 850 | 1380 | 1390 | 1560 | 1995 | 755 | 85 | 32-φ39 | 32-φ48 |
| 1400 | 56" | 530 | 1000 | 1590 | 1590 | 1760 | 2310 | 910 | 103 | 36-φ42 | 36-φ48 |
| 1600 | 64" | 600 | 1000 | 1820 | 1820 | 1970 | 2595 | 1030 | 123 | 40-φ48 | 40-φ56 |
| 1800 | 72" | 697 | 1100 | 2020 | 2020 | 2180 | 2810 | 1140 | 135 | 44-φ48 | 44-φ56 |
| 2000 | 80" | 760 | 1100 | 2230 | 2230 | 2345 | 3100 | 1250 | 145 | 48-φ48 | 48-φ62 |















