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Pneumatic flange eccentric soft sealing butterfly valve
Model: D643H / F
Nominal diameter: DN50-DN2000
Nominal pressure: 0.6 ~ 1.6MPa
Body material: WCB, QT450-10, HT200, HT250
Applicable temperature: Nitrile rubber: -40 ℃ ~ 90 ℃ Viton: 20 ℃ ~ 200 ℃
suitable medium: water, air, natural gas, oil and weak corrosive fluid
manufacturing standards: GB / T122387-89
flange standards: GB9113-2000, GB17241.6-1998
structure standard length: GB12221-89
test Standard: GB / T13927-92

Pneumatic flange eccentric soft seal butterfly valve is composed of angular stroke pneumatic piston actuator and butterfly valve body. It adopts three-dimensional eccentric principle to design so that the space trajectory of the sealing surface is idealized. There is no friction and no interference between the sealing surfaces. Coupled with the proper choice of sealing material, so that the butterfly valve sealing, corrosion resistance, high temperature resistance and wear resistance has been a reliable guarantee. 
 
 First, the pneumatic flange soft seal eccentric butterfly valve Features
 1, the operating torque is small, all kinds of operating torque in a valve of the smallest, quick opening and closing to compressed air as the driving force through the piston rack and pinion gear mechanical transmission stem , The torque output by the angular stroke of the rotary valve plate 0 ~ 90 °, you can quickly complete the opening and closing movements, simple structure, small size, light weight, small flow resistance, flow coefficient, good sealing performance. Large adjustment range. Is the automation control system instrumentation unit. 
 
 2, the use of electric - gas valve positioner to electrical signals and compressed air as the driving force to accept the control system input 0-10mADC or 4-20mADC current signal from the regulator will be compressed air into gas pressure signal input and output, Change the valve plate rotation angle (0-90 ° any angle), with better regulation of control flow and other parameters. 
 
 3, the use of electromagnetic valve, valve position back to the device to AC220V or DC24V power supply voltage and compressed air as the driving force to achieve fluid medium fast two-position control. 
 
 4, the implementing agencies using piston cylinder and crank conversion structure, the output torque, small size, the use of fully sealed waterproof design high degree of protection. Cylinder body with mirror cylinder, no oil lubrication, small friction coefficient, corrosion resistance, with superior durability and reliability. All drive bearings are self-lubricating bearings with no oil lubrication to ensure that the drive shaft is not worn.

Second, the main end of the parameters

Nominal through DN (mm)

50 ~ 2000

50 ~ 1600

Nominal pressure PN (MPa)

0.6

1.0

1.6

Seal test (MPa)

0.66

1.1

1.76

Strength test (MPa)

0.9

1.5

2.4

proper temperature

Nitrile rubber: -40 ℃ ~ 90 ℃ Viton: -20 ℃ ~ 200 ℃

Suitable media

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

Leak rate

In line with GB / T13927-92 standards

Drive mode

Worm gear, electric, pneumatic, hydraulic


 Third, the main components and parts

Part Name

material

Body

WCB, QT450-10, HT200, HT250

Butterfly plate

WCB, QT450-10, HT200, HT250

Valve shaft

2Cr13

Sealing ring

Nitrile oil-resistant rubber

filler

Flexible graphite


  Third, the main dimensions

The main form of connection size

Flange size and bolt hole size

DN

L

H

A

B

0.6MPa

1.0MPa

1.6MPa

D

D1

D2

nd

D

D1

D2

nd

D

D1

D2

nd

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


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