Supplier of Double Eccentric Flanged Butterfly Valve for marine, chemical, oil and gas industry

Double Eccentric Butterfly Valves have butterfly shaped gates and two offsets. The valve has a body which seats the gate, a threaded stem which connects to the handle and the handle outside the body. The butterfly valves do not operate like ordinary gate valves. The Double Eccentric Butterfly Valve Advantages include that the valve gate is always inside the body and is not lowered or raised during operations. This avoids water hammer effect on the valve gate. The gate is designed with a disc connected to an axis which gives a look of a butterfly. The double eccentric valve has a floating seat construction. This has a bidirectional sealing which avoids backflow. The Double Eccentric Butterfly Valve Metal Seated combination allows for high performance under elevated temperatures and pressures.

Stainless Steel Double Eccentric Butterfly Valves

Stainless Steel Double Eccentric Butterfly Valves

Double Eccentric Flanged Butterfly Valve

Double Eccentric Flanged Butterfly Valve

Double Eccentric Wafer Butterfly Valve

Double Eccentric Wafer Butterfly Valve

Leading Manufacturer of Double Eccentric Butterfly Valves, Check Double Eccentric Flanged Butterfly Valve Dimensions

The valves come in wafer type, lug type and in double flange types. The range of the dimensions are governed by the different standards and there are valves ranging from 2 inches to 48 inches with DIN 50 to DIN 1200. The pressure capacities of the Stainless Steel Double Eccentric Butterfly Valves range between PN16 to PN25. But there are optional dimensions and pressure capacities that could be produced upon request by the customers. The standard seat material and the Alloy steel Double Eccentric Butterfly Valves body material could vary. There are PTFE coated and other type of finishes available to the valves for corrosion resistance and long lasting life. The Inconel B673 valves can withstand temperatures up to 500 degrees Celsius.

 

Specification Table of Double Eccentric Butterfly Valves

Size 50NB — 600NB
Pressure 150PS1
Temperature 0 Deg C - 1200 Deg C.
Body , Chest Solid One piece casting of Cast Iron Fg 260, Cast Steel Gr WCB ,CF8,CF8M.
Seat Integral to Body, Soft, Optional.
Gate AISI SS 304,316,316L,317,317L
Screw Spindle AISI SS 410,304,316.
Nut Brass
Yoke Plate type of MS .
Gland Follower Cast Iron , Cast steel , Ductile Iron ,CF8,CF8M.
Hand Wheel Cast Iron , Cast steel , Ductile Iron
Gland Packing PTFE , PTFE Impregnated
Ends Lugged
Port STANDARD [Round], Optional V Port, Diamond Port,.

Size Range of Metal Seated Double Eccentric Butterfly Valves

Size Range 2" to 48"

Standard Seat Material of Double Eccentric Butterfly Valves

  • PTFE: -29°C to 210°C
  • R-PTFE: -29°C to 250°C
  • PTFE/SS316 (fire safe): -29°C to 210°C
  • R-PTFE/SS316 (fire safe): -29°C to 250°C
  • Inconel B637: -29°C to 500°C

Parts & Material of Soft Seat Double Eccentric Butterfly Valves

Pos. Part Material, Carbon steel valve Stainless steel valve Pos. Part Material, Carbon steel valve Stainless steel valve
1 Body A216-WCB (1.0619) A351-CF8M (1.4408) 9 Thrust ring A240-F316 (1.4404) A240-F316 (1.4404)
2 Disc A351-CF8M (1.4408) A351-CF8M (1.4408) 10 Seal PTFE PTFE
3 Retainer ring A351-CF8M (1.4408) A351-CF8M (1.4408) 11 Bottom cover A216-WCB (1.0619) A351-CF8M (1.4408)
4 Seat PTFE PTFE 12 Gland packing PTFE PTFE
R-PTFE-GF15% 2 PTFE-GF15% 2 13 Gland A351-CF8M (1.4408) A351-CF8M (1.4408)
R-PTFE-CF15% 2 PTFE-CF15% 2 14 Bracket A351-CF8 (1.4308) A351-CF8 (1.4308)
5+6 Bushing PTFE+SS316 PTFE+SS316 15 Stud bolt A193-B8 (1.4301) A193-B8 (1.4301)
7 Shaft A182-F316 (1.4401) A182-F316 (1.4401) 16 Nut A194-8 (1.4571) A194-8 (1.4571)
8 Pin A182-F316 (1.4401) A182-F316 (1.4401) 17 Bolt A193-B8 (1.4301) A193-B8 (1.4301)

Class 150 KV Valves of Double Eccentric Butterfly Valves

DN NPS 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
50 2” 3 11 22 34 62 109 132 176 202 138
65 (2½”) 6 20 39 57 106 208 223 298 340 224
80 3” 9 29 59 87 160 280 338 452 516 344
100 4” 10 35 62 95 185 324 360 468 497 530
125 (5”) 15 46 92 136 251 438 529 706 805 848
150 6” 21 67 131 195 361 630 761 1.017 1.159 1.189
200 8” 36 119 234 348 472 662 851 1.127 1.254 1.514
250 10” 108 264 426 504 798 1.090 1.427 1.782 2.111 2.307
300 12” 147 359 579 835 1.125 1.518 2.646 2.988 3.329 3.777
350 14” 192 438 689 1.008 1.396 1.938 2.701 3.659 4.636 5.159
400 16” 272 465 780 1.145 1.647 2.150 3.203 4.667 5.957 6.714
450 18” 339 818 1.259 1.765 2.436 3.389 4.685 6.108 7.383 8.091
500 20” 444 1.035 1.586 2.213 3.032 4.276 6.218 7.869 9.525 10.228
600 24” 731 1.610 2.380 3.383 4.758 6.629 9.377 12.477 15.870 17.181

View SS Double Eccentric Wafer Butterfly Valve Pressure Ratings, Biggest supplier of Bronze Double Flanged Double Eccentric Butterfly Valve

Class 300 KV Valves of Double Eccentric Butterfly Valves

DN NPS 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
65 (2.½”) 6 20 39 57 106 185 223 298 340 224
80 3” 9 29 59 87 160 280 338 452 516 344
100 4” 10 35 62 95 185 324 360 468 497 530
125 (5”) 15 46 92 136 251 438 529 706 805 848
150 6” 18 58 129 188 303 588 692 822 1.081 1.099
200 8” 29 103 203 319 461 622 839 1.061 1.151 1.411
250 10” 62 184 338 501 695 915 1.242 1.618 2.001 2.156
300 12” 90 257 446 690 1.013 1.436 1.989 2.592 3.301 3.447
350 14” 106 332 586 901 1.321 1.822 2.502 3.308 3.962 4.145
400 16” 212 412 728 1.092 1.594 2.097 2.885 4.348 5.289 5.543
450 18” 268 522 1.060 1.543 2.236 3.012 4.078 5.386 6.733 7.085
500 20” 330 644 1.308 1.905 2.760 3.719 5.369 6.991 8.846 9.499
600 24” 476 927 1.884 2.744 3.976 5.354 7.731 10.067 12.738 13.612

Soft Seated Double Eccentric Butterfly Valves Torque

Size rP (bar)
DN NPS 0 5 10 15 20 25
               
50 2” 10 12 14 16 17 20
65 (2½”) 15 17 23 27 32 40
80 3” 20 23 29 34 40 46
100 4” 27 32 40 47 60 66
125 (5”) 40 42 59 69 81 98
150 6” 48 64 80 91 114 136
200 8” 69 88 114 128 157 187
250 10” 116 163 201 238 304 377
300 12” 151 227 288 415 481 637
350 14” 294 415 604 754 905 1.018
400 16” 441 528 754 905 1.056 1.207
450 18” 603 741 943 1.131 1.282 1.470
500 20” 770 1.086 1.357 1.584 1.900 2.171
600 24” 943 1.293 1.697 2.047 2.343 2.558

Torque Values of Metal Seated Double Eccentric Butterfly Valves

Size rP (bar)
DN NPS 0 5 10 15 20 25
               
50 2” 23 25 30 34 38 46
65 (2½”) 29 36 47 54 64 75
80 3” 39 47 59 71 83 98
100 4” 59 68 80 91 108 125
125 (5”) 91 106 131 150 172 187
150 6” 114 151 174 204 227 257
200 8” 136 181 227 272 324 370
250 10” 197 249 324 370 437 498
300 12” 257 362 423 528 664 777
350 14” 355 558 641 762 920 1.094
400 16” 506 739 973 1.161 1.297 1.448
450 18” 649 814 1.048 1.312 1.606 2.036
500 20” 830 1.064 1.387 1.667 2.247 2.624
600 24” 980 1.244 1.712 2.141 2.910 3.619

Various Types of Double-eccentric Butterfly Valves

Double Eccentric Flanged Butterfly Valve

Double Eccentric Flanged Butterfly Valve

SS Double Eccentric Wafer Butterfly Valve

SS Double Eccentric Wafer Butterfly Valve

Bronze Double Flanged Double Eccentric Butterfly Valve

Bronze Double Flanged Double Eccentric Butterfly Valve

Cast Steel Double Flange Butterfly Valve

Cast Steel Double Flange Butterfly Valve

Brass Rubber Lined Double Eccentric Butterfly Valve

Brass Rubber Lined Double Eccentric Butterfly Valve

Copper Nickel Double Eccentric Butterfly Valve

Copper Nickel Double Eccentric Butterfly Valve

Hydrolic Pilot Pressure of Double Eccentric Butterfly Valves

Hydrolic Pilot Pressure 135 Bar

Temperature Range of Metal Seated Double Eccentric Butterfly Valves

Temperature Range -20°F to 70°F
Ask for Cast Steel Double Flange Butterfly Valve Price List, Refer Brass Rubber Lined Double Eccentric Butterfly Valve Weight Chart

Cast Iron Double Eccentric Butterfly Valves Material Components

1. Gearbox Cast iron
2. Body Ductile iron GJS-500-7 (GGG-50)
3. Shaft, drive Stainless steel 420
4. Bearing Bronze/PTFE composite
5. Cover Stainless steel
6. Set screw Stainless steel A2
7. End cover Stainless steel
8. Disk Ductile iron GJS-500-7 (GGG-50)
9. Key Stainless steel A2
10. Gasket Stainless steel A2
11. Screw Stainless steel A2
12. Shaft, stub Stainless steel 420
13. End plate Ductile iron GJS-500-7 (GGG-50)
14. Nut Stainless steel A2
15. Gasket EPDM rubber
16. Spacer Bronze
17. Screw Stainless steel A2
18. Thrust bearing Bronze
19. Screw Stainless steel A2
20. Washer Stainless steel A2
21. Bolt Stainless steel A2
22. O-ring EPDM rubber
23. Screw Stainless steel A2
24. Seal retainer ring Steel
25. Seal ring EPDM rubber

PN10 Double Offset Soft Sealing Eccentric Butterfly Valves Dimensions

PN10 Double Offset Soft Sealing Eccentric Butterfly Valves

PN10
SIZE A B C D1 D2 D3 E F H1
Short Long
DN100 131.6 127 190 19 180 220 156 38.6 3 110
DN125 131.6 140 200 19 210 250 184 38.6 3 125.6
DN150 141.7 140 210 19 240 285 211 52.1 3 156
DN200 141.7 152 230 20 295 340 266 52.1 3 191.5
DN250 141.7 165 250 22 350 400 319 52.1 3 216.5
DN300 213.6 178 270 24.5 400 455 370 66.8 4 237.4
DN350 213.6 190 290 24.5 460 505 429 66.8 4 276.4
DN400 213.6 216 310 24.5 515 565 480 66.8 4 319.3
DN450 256.0 222 330 25.5 565 615 530 89.4 4 368
DN500 256.0 229 350 26.5 620 670 582 89.4 4 386.4
DN600 355.6 267 390 30 725 780 682 153.9 5 447
DN700 355.6 292 430 32.5 840 895 794 153.9 5 527
DN800 355.6 318 470 35 950 1015 901 153.9 5 589
DN900 456.0 330 510 37.5 1050 1115 1001 185.0 5 654
DN1000 456.0 410 550 40 1160 1230 1112 185.0 5 709
DN1200 591.3 470 630 45 1380 1455 1328 235.0 5 842
DN1400 647.7 530 710 46 1590 1675 1530 305.1 5 980
DN1600 647.7 600 790 49 1820 1915 1750 305.1 5 1123.7
DN1800 647.7 670 870 52 2020 2115 1950 305.1 5 1236.7

Dimensions of PN16 Double Eccentric Butterfly Valves

PN16
SIZE A B C D1 D2 D3 E F H1
Short Long
DN100 131.6 127 190 19 180 220 156 38.6 3 110
DN125 131.6 140 200 19 210 250 184 38.6 3 125.6
DN150 141.7 140 210 19 240 285 211 52.1 3 156
DN200 141.7 152 230 20 295 340 266 52.1 3 191.5
DN250 141.7 165 250 22 355 400 319 52.1 3 216.5
DN300 213.6 178 270 24.5 410 455 370 66.8 4 237.4
DN350 213.6 190 290 26.5 470 520 429 66.8 4 276.4
DN400 213.6 216 310 28 525 580 480 66.8 4 319.3
DN450 256.0 222 330 30 585 640 548 89.4 4 368
DN500 343.4 229 350 31.5 650 715 609 122.9 4 386.4
DN600 355.6 267 390 36 770 840 720 153.9 5 447
DN700 355.6 292 430 39.5 840 910 794 153.9 5 527
DN800 421.5 318 470 43 950 1025 901 145.8 5 589
DN900 456.0 330 510 46.5 1050 1125 1001 185.0 5 654
DN1000 559.6 410 550 50 1170 1255 1112 235.0 5 709
DN1200 647.7 470 630 57 1390 1485 1328 305.1 5 842
DN1400 647.7 530 710 60 1590 1685 1530 305.1 5 980
DN1600 647.7 600 790 65 1820 1930 1750 305.1 5 1123.7
DN1800 1014.7 670 870 70 2020 2130 1950 495.3 5 1236.7

Manufacturing Standards of Cast Iron Double Eccentric Butterfly Valves

  • Designed according to EN 593
  • Face-to-face dimension according to EN 558 Table 2 Basic Series 13
  • Standard flange drilling to EN1092-2 (ISO 7005-2), PN 16
Stockholder of Carbon Steel Double Eccentric Butterfly Valves, Copper Nickel Double Eccentric Butterfly Valve Metal Seated Distributor

Test & Approvals of Cast Iron Double Eccentric Butterfly Valves

  • Hydraulic test according to EN 1074-1 and 2 / EN 12266
  • Approved according to DIN-DVGW Certificate NW-6201BR0451
  • Approved according to KIWA Certificate K 6320
  • Approved according to WRAS Certificate No. 1702367