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DS343H double pressure flange butterfly valve

Product Overview

DS343H double pressure flange butterfly valve is designed by our company's technical personnel after absorbing the structure and characteristics of similar foreign products and overcoming the defects existing in the use of the original products, so that its life is more durable and the sealing is more reliable. The butterfly valve adopts the three-dimensional eccentric design principle, and the sealing pair is composed of two overlapping cone inclined sections. After the eccentric value of the valve body and valve seat, the butterfly plate rotation center can realize the instantaneous contact and separation of opening and closing. The labyrinth seal is realized by the laminated structure of butterfly plate sealing ring metal and graphite, which can not only reduce the switching torque of the valve, but also ensure the sealing performance of the butterfly valve Pressure butterfly valve adopts reducing eccentricity value and enhancing strength of butterfly plate, valve shaft and actuator to realize zero leakage of inlet and outlet bidirectional seal of butterfly valve.

Structural characteristics

1. The inclined elliptical butterfly plate radial dynamic balance sealing system is adopted, the force on both sides of the valve inlet and outlet is approximately balanced, the opening torque of the valve is small, the positive and reverse sealing performance is reliable, and the bidirectional pressure bearing capacity is 100%;
2. The sealing surface of the valve is made of integral metal sealing ring, which is machined with high precision. The sealing cross-section is elliptical, which forms a sealing pair with the metal sealing surface of the valve seat. When the valve is opened and closed, the sealing surface of butterfly plate contacts or disengages instantaneously along the 360 ° circle, which can quickly and accurately realize the opening or closing action;
3. Three eccentric structure is adopted, that is, an angle eccentricity is added on the basis of double eccentric butterfly valve.

Execution standard

Design specification: GB/T 12238, JB/T8527
Flange connection: GB/T 9113, JB/T79, HG20592
Structure length: GB/T12221
Tests and inspection: GB/T13927

Performance parameter

Main material: cast steel, stainless steel, chromium-molybdenum steel, alloy steel, duplex steel
Product model: DS343H
Product specification: DN50~2000mm
Pressure class: PN0.6~ 4.0MPa
Applicable medium: air, water, steam, gas, oil, acid, alkali, salt with weakly corrosive medium, etc
Applicable temperature: Carbon steel: -29℃~425℃ Stainless steel: -40℃~600℃
Driving mode: worm drive, pneumatic drive, electric drive, hydraulic drive

Product Dimensions


DN

Structure length (standard)

Boundary dimensions (reference)

Connection dimensions (standard)

L

H

DS343H

DS643H

DS943H

PN0.25MPa

PN0.6MPa

PN1.0MPa

mm

inches

short

long

H1

A1

B1

H2

A2

B2

H3

A3

B3

D

D1

Z-d

D

D1

Z-d

D

D1

Z-d

40

1 1/2

106

140

107

330

180

200

605

245

72

530

250

255

130

100

4-14

130

100

4-14

150

110

4-18

50

2

108

150

112

350

180

200

625

245

72

530

250

255

140

110

4-14

140

110

4-14

165

125

4-18

65

2 1/2

112

170

115

370

180

200

645

245

72

530

250

255

160

130

4-14

160

130

4-14

185

145

4-18

80

3

114

180

120

380

180

200

675

355

92

565

250

255

190

150

4-18

190

150

4-18

200

160

8-18

100

4

127

190

138

420

180

200

715

355

92

600

250

255

210

170

4-18

210

170

4-18

220

180

8-18

125

5

140

200

164

460

180

200

800

355

92

640

250

255

240

200

8-18

240

200

8-18

250

210

8-18

150

6

140

210

175

555

270

280

850

250

170

705

300

315

265

225

8-18

265

225

8-18

285

240

8-22

200

8

152

230

200

760

400

425

925

250

170

775

300

315

320

280

8-18

320

280

8-18

340

295

8-22

250

10

165

250

243

830

400

425

1035

450

220

945

300

315

375

335

12-18

375

335

12-18

395

350

12-22

300

12

178

270

250

895

450

560

1070

450

220

1070

300

315

440

395

12-22

440

395

12-22

445

400

12-22

350

14

190

290

280

950

450

560

1190

450

280

1140

300

315

490

445

12-22

490

445

12-22

505

460

16-22

400

16

216

310

305

1190

535

580

1250

650

280

1210

300

315

540

495

16-22

540

495

16-22

565

515

16-26

450

18

222

330

350

1255

535

580

1295

650

280

1335

575

714

595

550

16-22

595

550

16-22

615

565

20-26

500

20

229

350

380

1305

535

580

1455

850

380

1415

575

714

645

600

20-22

645

600

20-22

670

620

20-26

600

24

267

390

445

1340

570

660

1585

850

380

1605

656

810

755

705

20-26

755

705

20-26

780

725

20-30

700

28

292

430

480

1520

750

550

1700

1250

380

1844

656

810

860

810

24-26

860

810

24-26

895

840

24-30

800

32

318

470

530

1710

750

550

1865

1250

380

2040

656

810

975

920

24-30

975

920

24-30

1015

950

24-33

900

36

330

510

580

1810

750

550

2015

1500

580

2255

785

863

1075

1020

24-30

1075

1020

24-30

1115

1050

28-33

1000

40

410

550

650

1960

900

750

2226

1500

580

2380

785

863

1175

1120

28-30

1175

1120

28-30

1230

1160

28-36

1200

48

470

630

760

2250

1000

925

-

-

-

2640

785

863

1375

1320

32-30

1405

1340

32-33

1455

1380

32-39

1400

56

530

710

850

2435

1000

925

-

-

-

2886

-

-

1575

1520

36-30

1630

1560

36-36

1675

1590

36-42

1600

64

600

790

1030

2780

1000

925

-

-

-

3156

-

-

1790

1730

40-30

1830

1760

40-36

1915

1820

40-48

1800

72

670

870

1230

3020

1100

980

-

-

-

3421

-

-

1990

1930

44-30

2045

1970

44-39

2115

2020

44-48

2000

80

760

950

1350

3270

1100

980

-

-

-

3685

-

-

2190

2130

48-30

2265

2180

48-42

2325

2230

48-48



DN

Structure length (standard)

Boundary dimensions (reference)

Connection dimensions (standard)

H

DS343H

DS643H

DS943H

PN1.6MPa

PN2.5MPa

L

mm

inches

short

long

H1

A1

B1

H2

A2

B2

H3

A3

B3

D

D1

Z-d

D

D1

Z-d

50

2

108

150

112

350

180

200

625

245

72

530

250

255

165

125

4-18

165

125

4-18

65

2 1/2

112

170

115

370

180

200

 625

245

72

 530

250

255

185

145

4-18

185

145

8-18

80

3

114

180

120

380

180

200

 645

245

72

 565

250

255

200

160

8-18

200

160

8-18

100

4

127

190

138

420

180

200

 675

355

92

 600

250

255

220

180

8-18

235

190

8-22

125

5

140

200

164

460

180

200

 715

355

92

 640

250

255

250

210

8-18

270

220

8-26

150

6

140

210

175

555

270

280

 800

355

92

 705

300

315

285

240

8-22

300

250

8-26

200

8

152

230

200

760

400

425

 850

250

170

 775

300

315

340

295

12-22

360

 310

12-26

250

10

165

250

243

830

400

425

 925

250

170

 945

300

315

405

355

12-26

425

 370

12-30

300

12

178

270

250

895

450

560

1035

450

220

1070

300

315

460

410

12-26

485

430

16-30

350

14

190

290

280

950

450

560

1070

450

220

1140

300

315

520

470

16-26

555

490

16-33

400

16

216

310

305

1190

535

580

1190

450

220

1210

300

315

580

525

16-30

620

550

16-36

450

18

222

330

350

1255

535

580

1250

650

280

1335

575

714

640

585

20-30

670

 600

20-36

500

20

229

350

380

1305

535

580

1290

650

280

1415

575

714

715

650

20-33

730

 660

20-36

600

24

267

390

445

1340

570

660

1455

850

380

1605

656

810

840

770

20-36

845

770

20-39

700

28

292

430

480

1520

750

550

1585

850

380

1844

656

810

910

840

24-36

960

 875

24-42

800

32

318

470

530

1710

750

550

1700

1250

380

2040

656

810

1025

950

24-39

1085

 990

24-48

900

36

330

510

580

1810

750

550

1865

1250

380

2255

785

863

1125

1050

28-39

1185

1090

28-48

1000

40

410

550

650

1960

900

750

2015

1250

380

2380

785

863

1255

1170

28-42

1320

1210

28-56

1200

48

470

630

760

2250

1000

925

2250

1250

380

2640

785

863

1485

1390

32-48

1530

1420

32-56

1400

56

530

710

850

2435

1000

925

-

-

-

2886

-

-

1685

1590

36-48

1755

1640

36-62

1600

64

600

790

1030

2780

1000

925

-

-

-

3156

-

-

1930

1820

40-56

1975

1860

40-62

1800

72

670

870

1230

3020

1100

980

-

-

-

3421

-

-

2130

2020

44-56

2195

2070

44-70

2000

80

760

950

1350

3270

1100

980

-

-

-

3685

-

-

2345

2230

48-62

2425

2300

48-70



DN

Structure length (standard)

Boundary dimensions (reference)

Connection dimensions (standard)

H

DS343H

DS643H

DS943H

PN4.0MPa

L

mm

inches

short

long

H1

A1

B1

H2

A2

B2

H3

A3

B3

D

D1

Z-d

50

2

108

150

112

350

180

200

625

250

170

530

250

255

165

125

4-18

65

2 1/2

112

170

115

370

180

200

 625

250

170

 530

250

255

185

145

8-18

80

3

114

180

120

380

180

200

 645

250

170

 565

250

255

200

160

8-18

100

4

127

190

138

420

180

200

 675

250

170

 600

250

255

235

190

8-22

125

5

140

200

164

460

180

200

 715

450

220

 640

250

255

270

220

8-26

150

6

140

210

175

555

270

280

 800

450

220

 705

300

315

300

250

8-26

200

8

152

230

200

760

400

425

 850

450

220

 775

300

315

375

320

12-30

250

10

165

250

243

830

400

425

 925

450

280

 945

300

315

450

385

12-33

300

12

178

270

250

895

450

560

1035

650

280

1070

300

315

515

450

16-33

350

14

190

290

280

950

450

560

1070

650

280

1140

300

315

580

510

16-36

400

16

216

310

305

1190

535

580

1190

650

280

1210

300

315

660

585

16-39

450

18

222

330

350

1255

535

580

-

-

-

1335

575

714

685

610

20-39

500

20

229

350

380

1305

535

580

-

-

-

1415

575

714

777

670

20-42

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