Special Butterfly Valve for Coal Gas
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Name:

Special Butterfly Valve for Coal Gas

Category:

Butterfly valve

Remark:

Coal gas butterfly valve is a commonly used in the metallurgical, chemical and other fields in the ventilation pipe, is mainly responsible for containing dust cold, hot air flow, flow regulation and cut off, so it seems gas butterfly valve does not seem any remarkable, However, compared with the normal valve, butterfly valve structure is more suitable for this work environment.

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Product Usage

     Coal gas butterfly valve is a commonly used in the metallurgical, chemical and other fields in the ventilation pipe, is mainly responsible for containing dust cold, hot air flow, flow regulation and cut off, so it seems gas butterfly valve does not seem any remarkable, However, compared with the normal valve, butterfly valve structure is more suitable for this work environment.

     Gas butterfly valves are made of welded center plate and steel plate, compact structure, light weight. Different from the ordinary type of valve, the characteristic is that it has no internal connection rod, bolts and other structures, so the corridor to bring gas corrosion and destruction have a stronger resistance.

Usually gas butterfly valve will be used pneumatic control or electric control, causing a small torque, easy to operate, high reliability. Therefore, metallurgy, environmental protection and other fields widely used. In addition, this valve can also be manually controlled and automatically switch between the control, to achieve more flexible use.

The use of this butterfly valve, to some extent, can replace the ball valve and gate valve, because there is no need to install multi-layer seals, but directly mounted on the valve body, the seat ring and pressure plate in the middle of the design ring, so to achieve even more ideal Two-way hard seal.

  

Gas-specific butterfly valve selection principle

1. In the system play the role of connectivity and cut off, and allows a small amount of medium leaks when the media leak (generally not more than 5%) of the damper can be used to close the damper, 74DD round damper, Fang Fengmen, steel shut off damper.

2. In the system play a role in regulating the flow of media, and generally can not afford to cut off the role of the damper, the damper should be used to adjust the damper, steel damper adjustment round. For the requirements of both regulation performance but also need to cut off the function of the media flow damper, should use the leak-free damper damper, 74DD round door, side door. Damper used for centrifugal fan inlet, should only be used to adjust the parallel switch damper, damper door. Used for regulating the role of the need to automatically shut off the occasion of the reverse flow of the throttle, the appropriate choice of anti-stop throttle.

3. In the system for cut off, and does not allow medium leakage (in theory, the amount of leakage is zero), should choose isolated door, the type of standard plug-in door, large gate, flap door, double peaked shutters Style door.

4. Used in the pulverized coal preparation system from the role of isolation throttle, optional pulverized coal gate device.

5. For gray coal dust and other granular materials isolated door, optional isolation gate device.

6. For the dust pipe vulnerable to wear and erosion of the vane damper, the surface to be wear-resistant, corrosion-resistant, optional wear-resistant ceramic door or surface coating of high temperature corrosion-resistant wear-resistant alloy layer damper (throttle life of 16Mn steel Extend the service life of 4 to 5 times).


Specification

Design and manufacture of standards: GB / T 12238-2008
Structure length standard: GB / T 12221-2005
Connection flange standard: GB / T 9113
Pressure temperature grade: GB / T 12224-2005
Test test standards: GB / T 13927-2008

 

Structural features

1. Quick and easy opening and closing, effort, fluid resistance, you can often operate.

2. Simple structure, small size, light weight.

3. To achieve a good seal under low pressure.

4. Adjust the performance.


 The main shape and connection size

PN

DN

L

D

D1

D2

Z-d

b

f

H

H0

1.0

50

108

165

125

99

4-18

20

2

170

130

1.0

65

112

185

145

118

4-18

20

2

170

145

1.0

80

114

200

160

132

8-18

20

2

230

152

1.0

100

127

220

180

156

8-18

22

2

320

192

1.0

125

140

250

210

184

8-18

22

2

345

200

1.0

150

140

285

240

211

8-22

24

2

385

230

1.0

200

152

340

295

266

8-22

24

2

471

297

1.0

250

165

405

355

319

12-22

26

2

533

327

1.0

300

178

445

400

370

12-22

26

2

606

364

1.0

350

190

505

460

429

16-22

26

2

694

404

1.0

400

216

565

515

480

16-26

26

2

757

444

1.0

450

222

615

565

530

20-26

28

2

814

472

1.0

500

229

670

620

582

20-26

28

2

902

522

1.0

600

267

780

725

682

20-30

34

2

1048

590

1.0

700

292

895

840

794

24-30

34

5

1277

810

1.0

800

318

1015

950

901

24-33

36

5

1385

844

1.0

900

330

1115

1050

1001

28-33

38

5

1490

890

1.0

1000

410

1230

1160

1112

28-36

38

5

1620

950

1.6

50

108

165

125

99

4-18

20

2

170

130

1.6

65

112

185

145

118

4-18

20

2

170

145

1.6

80

114

200

160

132

8-18

20

2

230

152

1.6

100

127

220

180

156

8-18

22

2

320

192

1.6

125

140

250

210

184

8-18

22

2

345

200

1.6

150

140

285

240

211

8-22

24

2

385

230

1.6

200

152

340

295

266

12-22

24

2

471

297

1.6

250

165

405

355

319

12-26

26

2

533

327

1.6

300

178

460

410

370

12-26

28

2

606

364

1.6

350

190

520

470

429

16-26

30

2

694

404

1.6

400

216

580

525

480

16-30

32

2

757

444

1.6

450

222

640

585

548

20-30

40

2

814

472

1.6

500

229

715

650

609

20-33

44

2

902

522

1.6

600

267

840

770

720

20-36

54

2

1048

590

1.6

700

292

910

840

794

24-36

40

5

1277

810

1.6

800

318

1025

950

901

24-39

42

5

1385

844

1.6

900

330

1125

1050

1001

28-39

44

5

1490

890

1.6

1000

410

1225

1170

1112

28-42

46

5

1620

950

2.5

50

108

165

125

99

4-18

20

2

170

130

2.5

65

112

185

145

118

8-18

22

2

265

210

2.5

80

114

200

160

132

8-18

24

2

310

233

2.5

100

127

235

190

156

8-22

24

2

343

242

2.5

125

140

270

220

184

8-26

26

2

385

254

2.5

150

140

300

250

211

8-26

28

2

445

580

2.5

200

152

360

310

274

12-26

30

2

510

297

2.5

250

165

425

370

330

12-30

32

2

569

339

2.5

300

178

485

430

389

16-30

34

2

653

375

2.5

350

190

555

490

448

16-33

38

2

730

420

2.5

400

216

620

550

503

16-36

40

2

810

463

2.5

450

222

670

600

548

20-36

46

2

850

495

2.5

500

229

730

660

609

20-36

48

2

940

566

2.5

600

267

845

770

720

20-39

58

2

1150

630

2.5

700

292

960

875

820

24-42

58

5

1195

727

2.5

800

318

1085

990

609

24-36

58

5

1268

810

 

 

 

 

Structure picture

 


Inquiry

If you have any enquiry about quotation or cooperation,please feel free to email us at info@cnlg-valve.com or use the following enquiry form. Our sales representative will contact you within 24 hours. Thank you for your interest in our products.