Soft Sealing Butterfly Valves Double Flanged Design Anti - Corrosion
Butterfly Valves Introduction
The butterfly valve has the advantages of simple structure, small volume, light weight, less material consumption, small installation size, quick switch and small driving torque, and is widely used in the fields of large and medium caliber, medium and low pressure.
The butterfly valves are widely used in general industries such as petroleum, metallurgy, gas, chemical, power station, and water treatment. With the use of anti-corrosion synthetic rubber and polymer materials, the butterfly valves have a wider range of applications.
In recent years, metal sealing butterfly valves have developed rapidly. With the appearance of high temperature resistance, low temperature resistance, strong corrosion resistance, strong erosion resistance and high strength alloy materials in butterfly valves, the metal sealing butterfly valves are used widely in wording conditions, such as high temperature, low temperature, strong erosion, etc.The metal seal can adapt to higher operating temperatures, but the sealing performance is worse than the soft seal and the elastic seal.
Butterfly Valves Standard
Design: EN 593, EN 1074-1&2; IS 13095 Double Eccentric Double Flanged Butterfly Valve;
Face to Face in acc. EN 558 / ISO 5752 series 14;
ISO 5211 Mounting Flange standard;
Testing in acc. EN 12266-1;
Fusion Bonded Non-toxic Epoxy Powder Coating w/o NSF61/WRAS
Butterfly Valves Materials
Materials of Body : Ductile Iron (GGG40, GGG50). Cast Iron (GG25), Stainless Steel
Materials of Disc : Stainless Steel. Nickel Plated, Ductile Iron, Ductile Iron Coated Plastic,
Titanium Steel, Copper Alloy etc
Materials of Seat : Ethylene-Propylene-Diene Monomer (EPDM), Polytetrafluoroethylene (PTFE),
Nitrile Rubber (NBR), Chloroprene, Chlorosulfonated Polyethylene (Hypalon),
Silicon, Fluoroelastomer (VITON) , Caoutchouc etc.
Materials of Stem : Stainless Steel. Carbon Steel ,2Cr13
Stainless Steel Butterfly Valve Technical Specification
- Nominal diameter:150～2600mm
- Nominal pressure:1.0/1.6/2.5Mpa
- Strength testing pressure:1.5/2.4/3.75Mpa
- Sealing testing pressure:1.1/1.76/2.75Mpa
Executive standard
| Design standard | DIN3354 |
| Face to face | DIN3202 or BS 5155 |
| Flange end | DIN 2501 |
| Test & inspection | DIN 3230 or GB/T 13927 |
| Working temperature | NBR<80℃; EPDM<120℃; FPM<160℃ |
Main external and connection dimension
1.0MPa mm
| DN | L | H1 | H2 | H3 | Flange dimensions comply with DIN 2501 |
| long type | short type | O | C | g | f | b | n-d |
| 150 | 210 | 140 | 226 | 165 | | 285 | 240 | 212 | 3 | 19 | 8-23 |
| 200 | 230 | 152 | 255 | 192 | | 340 | 295 | 268 | 3 | 20 | 8-23 |
| 250 | 250 | 165 | 293 | 227 | | 395 | 350 | 320 | 3 | 22 | 12-23 |
| 300 | 270 | 178 | 326 | 260 | | 445 | 400 | 370 | 4 | 24.5 | 12-23 |
| 350 | 290 | 190 | 368 | 314 | | 505 | 460 | 430 | 4 | 24.5 | 16-23 |
| 400 | 310 | 216 | 423 | 346 | 634 | 565 | 515 | 482 | 4 | 24.5 | 16-28 |
| 450 | 330 | 222 | 455 | 385 | 666 | 615 | 565 | 532 | 4 | 25.5 | 20-28 |
| 500 | 350 | 229 | 506 | 422 | 728 | 670 | 620 | 585 | 4 | 26.5 | 20-28 |
| 600 | 390 | 267 | 568 | 490 | 790 | 780 | 725 | 685 | 5 | 30 | 20-31 |
| 700 | 430 | 292 | 632 | 550 | 854 | 895 | 840 | 800 | 5 | 32.5 | 24-31 |
| 800 | 470 | 318 | 692 | 615 | 924 | 1015 | 950 | 905 | 5 | 35 | 24-34 |
| 900 | 510 | 330 | 815 | 678 | 1098 | 1115 | 1050 | 1005 | 5 | 37.5 | 28-34 |
| 1000 | 550 | 410 | 880 | 743 | 1163 | 1230 | 1160 | 1110 | 5 | 40 | 28-37 |
| 1200 | 630 | 470 | 1024 | 860 | 1307 | 1455 | 1380 | 1330 | 5 | 45 | 32-40 |
| 1400 | 710 | 530 | 1210 | 1010 | 1350 | 1675 | 1590 | 1535 | 5 | 46 | 36-43 |
| 1600 | 790 | 600 | 1340 | 1140 | 1480 | 1915 | 1820 | 1760 | 5 | 49 | 40-49 |
| 1800 | 870 | 670 | 1460 | 1360 | 1640 | 2115 | 2020 | 1960 | 5 | 52 | 44-49 |
| 2000 | 950 | 760 | 1660 | 1485 | 1800 | 2325 | 2230 | 2170 | 5 | 55 | 48-49 |
1.6MPa mm
| DN | L | H1 | H2 | H3 | Flange dimensions comply with DIN 2501 |
| long type | short type | O | C | g | f | b | n-d |
| 150 | 210 | 140 | 226 | 165 | | 285 | 240 | 212 | 3 | 19 | 8-23 |
| 200 | 230 | 152 | 255 | 192 | | 340 | 295 | 268 | 3 | 20 | 12-23 |
| 250 | 250 | 165 | 293 | 227 | | 405 | 355 | 320 | 3 | 22 | 12-28 |
| 300 | 270 | 178 | 326 | 260 | | 460 | 410 | 378 | 4 | 24.5 | 12-28 |
| 350 | 290 | 190 | 368 | 314 | | 520 | 470 | 438 | 4 | 26.5 | 16-28 |
| 400 | 310 | 216 | 423 | 346 | 634 | 580 | 525 | 490 | 4 | 28 | 16-31 |
| 450 | 330 | 222 | 455 | 385 | 666 | 640 | 585 | 550 | 4 | 30 | 20-31 |
| 500 | 350 | 229 | 506 | 422 | 728 | 715 | 650 | 610 | 4 | 31.5 | 20-34 |
| 600 | 390 | 267 | 568 | 490 | 790 | 840 | 770 | 725 | 5 | 36 | 20-37 |
| 700 | 430 | 292 | 632 | 550 | 854 | 910 | 840 | 795 | 5 | 39.5 | 24-37 |
| 800 | 470 | 318 | 692 | 615 | 924 | 1025 | 950 | 900 | 5 | 43 | 24-40 |
| 900 | 510 | 330 | 815 | 678 | 1098 | 1125 | 1050 | 1000 | 5 | 46.5 | 28-40 |
| 1000 | 550 | 410 | 880 | 743 | 1163 | 1255 | 1170 | 1115 | 5 | 50 | 28-43 |
| 1200 | 630 | 470 | 1024 | 860 | 1307 | 1485 | 1390 | 1330 | 5 | 57 | 32-49 |
| 1400 | 710 | 530 | 1210 | 1010 | 1350 | 1685 | 1590 | 1530 | 5 | 60 | 36-49 |
| 1600 | 790 | 600 | 1340 | 1140 | 1480 | 1930 | 1820 | 1750 | 5 | 65 | 40-56 |
2.5MPa mm
| DN | L | H1 | H2 | H3 | Flange dimensions comply with DIN 2501 |
| long type | short type | O | C | g | f | b | n-d |
| 150 | 210 | 140 | 226 | 165 | | 300 | 250 | 211 | 3 | 20 | 8-28 |
| 200 | 230 | 152 | 255 | 192 | | 360 | 310 | 274 | 3 | 22 | 12-28 |
| 250 | 250 | 165 | 293 | 227 | | 425 | 370 | 330 | 3 | 24.5 | 12-31 |
| 300 | 270 | 178 | 326 | 260 | | 485 | 430 | 390 | 4 | 27.5 | 16-31 |
| 350 | 290 | 190 | 368 | 314 | | 555 | 490 | 450 | 4 | 30 | 16-34 |
| 400 | 310 | 216 | 423 | 346 | 634 | 620 | 550 | 500 | 4 | 32 | 16-37 |
| 450 | 330 | 222 | 455 | 385 | 666 | 670 | 600 | 560 | 4 | 34.5 | 20-37 |
| 500 | 350 | 229 | 506 | 422 | 728 | 730 | 660 | 610 | 4 | 36.5 | 20-37 |
| 600 | 390 | 267 | 568 | 490 | 790 | 845 | 770 | 720 | 5 | 42 | 20-40 |
| 700 | 430 | 292 | 632 | 550 | 854 | 960 | 875 | 820 | 5 | 46.5 | 24-43 |
| 800 | 470 | 318 | 692 | 615 | 924 | 1085 | 990 | 930 | 5 | 51 | 24-49 |
| 900 | 510 | 330 | 815 | 678 | 1098 | 1185 | 1090 | 1028 | 5 | 55.5 | 28-49 |
| 1000 | 550 | 410 | 880 | 743 | 1163 | | | | 5 | | |
| 1200 | 630 | 470 | 1024 | 860 | 1307 | | | | 5 | | |
| 1400 | 710 | 530 | 1210 | 1010 | 1350 | | | | 5 | | |
| 1600 | 790 | 600 | 1340 | 1140 | 1480 | | | | 5 | | |
Maintenance
Open the worm box cover and add some butter per two months.
Check the seal, packing and flange, if leak, please maintain ASAP.
