Products > Butterfly valve > Single eccentric flange butterfly valve

Single eccentric flange butterfly valve

Product model: D342X
Nominal diameter: DN50 ~ 2000mm
Nominal pressure: PN0.6~1.6MPa
Applicable temperature: rubber: -40℃ ~ 90℃ fluororubber: -20℃ ~ 200℃
Applicable medium: water, air, natural gas, oil and weakly corrosive fluid
Driving mode: worm gear drive, electric, pneumatic, hydraulic
Body material: WCB, qt450-10, HT200, HT250
Flange standard: gb9113-2000, gb17241.6-1998
The price is negotiable

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1. Single eccentric flange butterfly valve product introduction

The structure characteristic of single eccentric flange butterfly valve is that the stem axis deviates from the center of butterfly plate, so that the upper and lower ends of butterfly plate no longer become rotary axis, dispersion, and reduce the excessive squeeze between the upper and lower ends of butterfly plate and the valve seat.Is made open-close circular disc and with the valve rod rotation to open and close and adjust the fluid channel of a valve, not only has simple structure, small volume, light weight, low material consumption, small installation size, small and small drive moment, as the anti-corrosion application of synthetic rubber and ptfe, worm wheel flange to improve the performance of the eccentric butterfly valve, and satisfy different working conditions.


2, Single eccentric flange butterfly valve working principle

The structure characteristic of single-eccentric flange butterfly valve is that the stem axis deviates from the center of butterfly plate, so that the upper and lower ends of butterfly plate no longer become rotary axis, dispersion, relieve the excessive extrusion between the upper and lower ends of butterfly plate and the valve seat, and solve the extrusion problem between the butterfly plate and the valve seat of concentric butterfly valve.Seats are synthetic rubber.When closed, the outer circular sealing surface of the butterfly plate squeezes the synthetic rubber seat, causing the seat to produce elastic deformation and forming elastic force for sealing specific pressure to ensure the sealing of the butterfly valve.


3, single eccentric flange butterfly valve product characteristics

1, the unique structure of the valve, flexible operation, labor saving, convenient.

2. The butterfly plate adopts frame structure with high strength, large flow area and small flow resistance.

3. The sealing material is made of stainless steel and silicone oil-resistant rubber, which has a long service life.

4, the valve adopts double eccentric structure, with more closed more tight sealing function, sealing performance is reliable.

5, the overall paint, can effectively prevent corrosion and as long as the replacement of sealing valve seat sealing material, can be used in different media.

6, the rubber seal ring can be located on the valve body, can also be located on the butterfly plate, can be applied to different characteristics of the media, for the user to choose.

7, the valve has a two-way sealing function, installation is not controlled by the flow of the medium, nor by the impact of the space position, can be installed in any direction.


4, Single eccentric flange butterfly valve main end parameters

DN(mm)

50~2000

50~1600

PN(MPa)

0.6

1.0

1.6

Sealing test (MPa)

0.66

1.1

1.76

strength test (MPa)

0.9

1.5

2.4

Suitable temperature

Rubber: -40℃ ~ 90℃ fluorinated rubber: -20℃ ~ 200℃

Applicable medium

Water, air, natural gas, oil and weakly corrosive fluids

Leakage rate

Conform to GB / T13927-92

Drive way

Worm gear transmission, electric, pneumatic, hydraulic

 

5, Single eccentric flange butterfly valve main parts materials

Part name

Material

Body

WCB,QT450-10,HT200,HT250

Disc

WCB,QT450-10、HT200、HT250

Valve shaft

2Cr13

Sealing ring

Oil resistant rubber

Packing

Flexible graphite

 

6, Single eccentric flange butterfly valve implementation standards

Manufacturing standards

GB/T 122387-89

Flange standard

GB9113-2000、GB17241.6-1998

Structural length standard

GB12221-89

Inspection standard

GB/T 13927-92

 

7, Single eccentric flange butterfly valve dimensions

DN

Main external connection dimensions

Flange dimensions and bolt hole dimensions

L

H

H1

A

B

0.6MPa

1.0MPa

1.6MPa

D

D1

D2

n-d

D

D1

D2

n-d

D

D1

D2

n-d

50

108

82.5

306

80

80

140

110

88

4-14

185

125

99

4-18

165

125

99

4-18

65

112

92.5

321

80

80

160

130

108

4-14

185

145

118

4-18

185

145

118

4-18

80

114

100

346

80

80

190

150

124

4-18

200

160

132

8-18

200

160

132

8-18

100

127

110

387

95

95

210

170

144

4-18

220

180

156

8-18

220

180

156

8-18

125

140

125

411

95

95

240

20

174

8-18

250

210

184

8-18

250

210

184

8-18

150

140

142.5

447

95

95

265

225

199

8-18

285

240

211

8-22

285

240

211

8-22

200

152

170

607

190

308

320

280

254

8-18

340

295

266

8-22

340

295

266

12-22

250

165

192.5

688

190

308

375

335

309

12-18

395

350

319

12-22

405

355

319

12-26

300

178

222.5

742

190

308

440

395

363

12-22

445

400

370

12-22

460

410

370

12-26

350

190

252.5

797

190

308

490

445

413

12-22

505

460

429

16-22

520

470

429

16-26

400

216

282.5

930

270

466

540

495

463

16-22

565

515

480

16-26

580

525

480

16-30

450

222

307.5

975

270

466

595

550

518

16-22

615

565

530

20-26

640

585

548

20-30

500

229

335

1065

270

466

645

600

568

20-22

670

620

582

20-26

715

650

609

20-33

600

267

390

1225

457

625

755

705

667

20-26

780

725

682

20-30

840

770

720

20-36

700

292

447.5

1343

457

625

860

810

772

24-26

895

840

794

24-30

910

840

794

24-36

800

318

507.5

1436

457

625

975

920

878

24-30

1015

950

901

24-33

1025

950

901

24-39

900

330

557.5

1616

598

853

1075

1020

978

24-30

1115

1050

1001

28-33

1125

1050

1001

28-39

1000

410

615

1711

598

853

1175

1120

1078

28-30

1230

1160

1112

28-36

1255

1170

1112

28-42

1200

470

727.5

1971

598

853

1405

1340

1295

32-33

1455

1380

1328

32-39

1485

1390

1328

32-48

1400

530

837.5

2218

860

1345

1630

1560

1510

36-36

1675

1590

1530

36-42

1685

1590

1530

36-48

1600

600

957.5

2578

860

1345

1830

1760

1710

40-36

1915

1820

1750

40-48

1930

1820

1750

40-56

1800

670

1057.5

2689

860

1345

2045

1970

1918

44-39

2115

2020

1950

44-48

2130

2020

1950

44-56

2000

760

1162.5

3022

952

1592

2265

2180

2125

48-42

2325

2230

2150

48-48

2345

2230

2150

48-62