Double Flanged Eccentric Butterfly Valve

PN10 / PN16 / CL125LB
4″~120″ (100~3000mm)
Cast Iron, Ductile Iron

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Double Flanged Eccentric Butterfly Valve Descriptions

Double flanged eccentric butterfly valve is one type of high performance butterfly valve, which is with eccentric action reduces torque and seat contact during operation, extending the valve service life. Its seat can be repaired on site, no needing dis-assembly. The double flanged eccentric butterfly valve is suitable for 90° on-off operation and regulation service. Flowspec Luokai can produce the double flanged butterfly valve according to GB12238, AWWA C504 and EN593. Just feel free to contact us now to get best prices. 30 years of experience. High quality. Big stock. Fast delivery. 

1. FEATURES

  • Eccentric action reduces torque and seat contact during operation, extending valve service life
  • Suitable for 90° on-off operation and regulation service
  • The seat can be repaired on site, no needing dis-assembly
  • Epoxy coating for corrosion resistance and long service life
  • Good sealing capability, no leakage

3. STANDARDS

  • Design & manufacturing: GB12238, AWWA C504, EN593
  • Face to face: ISO 5752, AWWA C504, GB12221, EN558-1, ANSI B16.10
  • Flanged ends: ANSI B16.5 ANSI 125/150; EN1092-2 PN10/PN16, DIN 2501 / BS 4504 / GB 17241.6 PN10/PN16
  • Top flange: ISO 5211
  • Inspection & testing: API598, GB13927

2. TECHNICAL SPECIFICATIONS

  • ANSI 125/150LB, PN1.0/PN1.6MPa, JIS5K/10K
  • Size: 4″~120″ (100~3000mm)
  • Materials: A126 B (GG25), A536 65-45-12 (GGG40), A216 WCB, S.S.304(CF8), S.S.316(CF8M), B148 C954
  • Epoxy coating with thickness ≥250μm
  • Applicable medium: water, sewage, sea water, air, food, medicine, oil, corrosive liquids
  • Applicable temperature: -20℃~+80℃ (higher temperature is available upon request)

4. APPLICATIONS

  • Water works, water projects
  • Environment protection
  • Public facilities
  • Power plant
  • Building industry, real estate
  • Petroleum, chemical industry
  • Steel work, metallurgy
  • Water treatment plant

 

A: Body

Short in structure, light in weight, highstrength, apply to wafer (small diameter) andflange connection.


B: Disc

High strength disc with precise machining,assure bi-direction pressure bearing and noleakage.


C: Shaft

High strength stainless steel shaft can delivertorque effectively.


D: Upper Flange

Available in actuators with various connectionstandards.


E: Packing Gland

Through pressing the packing gland, canprevent stem end from leakage.


F: Sealing Ring

The secondary shaft seal prevents fromimpurities and protects the shaft.

G:Bushing

Made of lubricant and small friction coefficientmaterial, support shaft and reduce rotationtorque.


H: Bottom Cover

Support disc by wearing washer and shaft,prevent falling and assure sealing performance.


I: Wearing Washer

Prevent the shaft end from wearing, reducerotation torque, and assure the disc in rightposition.


J: Seat Sealing Ring

High quality rubber ring, fixed on body, assuresno leakage. No more washers when valveconnects with flange.

K: O-Ring

Applied as secondary seal, prevent shaft endleakage.

Main Parts Materials of Series DL Flange Butterfly Valve

No. Part Material No. Part Material
1 Body HT200,A126 ClassB
QT450-10,A53665-45-12 WCB		 7 O-Ring NBR EPDM
2 Bushing ZCuZn38Mn2Pb2, Bronze
F4 Backing Steel		 8 Key 45 1045
3 Shaft 416 420 431 17-4PH 9 End Plate QT450-10 Q235-A Gr33
4 Seat NBR EPDM Viton 10 O-Ring NBR EPDM
5 Disc DI ALB CF8 CF8M 1.4529、1.4469 11 Hex. Bolt Q235-A Gr.33
6 Taper Pin 416 420 431 17-4PH 12 Spring Gasket Spring Steel
Note: Materials indicated in above table are for common usage, please give clear declaration in your contract if there is special need.

DN A B b f D K d F N-do L L1 D1 D2 N×d1 a° J X L2 ∅2 Weight
50 83 120 19 3 165 125 99 13 4-19 108 111 65 50 4-7 45 13.8 3 32 12.6 7.6
65 93 130 19 3 185 145 118 13 4-19 112 115 65 50 4-7 45 13.8 3 32 12.6 9.7
80 100 145 19 3 200 160 132 13 8-19 114 117 65 50 4-7 45 13.8 3 32 12.6 10.6
100 114 155 19 3 220 180 156 13 8-19 127 130 90 70 4-10 45 17.77 5 32 15.77 13.8
125 125 170 19 3 250 210 184 13 8-19 140 143 90 70 4-10 45 20.92 5 32 18.92 18.2
150 143 190 19 3 285 240 211 13 8-23 140 143 90 70 4-10 45 20.92 5 32 18.92 21.7
200 170 205 20 3 340 295 266 13 12-23 152 155 125 102 4-12 45 24.1 5 45 22.1 31.8
250 198 235 22 3 405 355 319 13 12-28 165 168 125 102 4-12 45 31.45 8 45 28.45 44.7
300 223 280 24.5 4 460 410 370 20 12-28 178 182 125 102 4-12 45 34.6 8 45 31.6 59
350 270 310 26.5 4 520 470 429 20 16-28 190 194 150 125 4-14 45 36.15 10 45 33.15 86
400 300 340 28 4 580 525 480 20 16-31 216 221 175 140 4-18 45 40.95 10 51 37.95 119
450 340 375 30 4 640 585 530 20 20-31 222 227 175 140 4-18 45 45.86 12 51 42.86 165
500 355 430 31.5 4 715 650 582 22 20-34 229 234 210 165 4-22 45 49.22 14 57 45.72 185
600 410 500 36 5 840 770 682 22 20-37 267 272 300 254 8-18 22.5 57.98 15 70 53.98 263
700 478 560 39.5 5 910 840 794 30 24-37 292 299 300 254 8-18 22.5 71.35 18 66 63.35 361
800 529 620 43 5 1025 950 901 30 24-41 318 325 350 298 8-22 22.5 79 20 66 70 484
900 584 685 46.5 5 1125 1050 1001 34 28-41 330 337 350 298 8-22 22.5 90 22 118 80 598
1000 657 735 50 5 1255 1170 1112 34 28-44 410 417 350 298 8-22 22.5 100 25 142 90 824
1200 799 917 57 5 1485 1380 1328 34 32-50 470 478 415 356 8-33 22.5 117 28 150 105 1223
1400 919 1040 60 5 1685 1590 1530 40 36-50 530 538 415 356 8-33 22.5 134 32 200 120 2386
1500 965 1050 62.5 5 1820 1710 1630 40 36-57 570 580 415 356 8-32 22.5 156 36 200 140 3475
1600 1045 1150 65 5 1930 1820 1700 50 40-57 600 610 415 365 8-32 22.5 156 36 200 140 4055
1800 1280 1290 70 5 2130 2020 1914 55 44-57 670 682 475 406 8-40 22.5 178 40 280 160 5570
2000 1350 1323 75 5 2345 2230 2130 55 48-62 760 772 475 406 8-40 22.5 178 40 280 160 7240

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