Hydraulic Control Butterfly Valve
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Name:

Hydraulic Control Butterfly Valve

Category:

Butterfly valve

Remark:

Liquid-controlled butterfly valve is a butterfly valve, liquid-controlled butterfly valve sub-pressure-type, lock-type and energy-saving three. It applies to the pump outlet and turbine inlet piping, as a closed-circuit and check valve, used to avoid and reduce the piping system in the media backflow and excessive water hammer to protect the piping system.

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Product Usage

     Liquid-controlled butterfly valve is a butterfly valve, liquid-controlled butterfly valve sub-pressure-type, lock-type and energy-saving three. It applies to the pump outlet and turbine inlet piping, as a closed-circuit and check valve, used to avoid and reduce the piping system in the media backflow and excessive water hammer to protect the piping system.

  

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

The pressure-type, locking-type liquid-controlled butterfly valve, driven by hydraulic drive, can be closed by the weight of the hammer. After the valve is installed, it can replace the gate valve (butterfly valve) and check valve, and the flow resistance coefficient is small. Valve closing time and speed of two stages, the first paragraph for the fast off, the latter part of the slow off, and can be adjusted according to user needs fast and slow closing time and angle, pressure-type hydraulic system with open valve automatically holding pressure and automatic reset function. Locked with dual automatic locking and locking pin locking. Accumulator liquid-controlled butterfly valve open by the pump, and closed by the accumulator. As a result of the accumulator off the valve, thus eliminating the weight, so take up space, easy installation, compact structure. Electrical control can be based on user needs common type control and PLC control, to achieve the valve linkage, and remote control can be achieved in situ and computer control.

 

  Main performance specifications

Nominal diameter

DN(mm)

50-4000

Nominal pressure

PN(MPa)

1.0

1.6

2.5

test pressure

Strength test

1.5

2.4

3.75

Seal test

1.1

1.76

2.75

Gas seal test

0.6

0.6

0.6

 

 Principle

1) Open the valve: hydraulic butterfly valve open, the use of hydraulic control station and the lifting cylinder force, through the arm, hammer rod, valve shaft and other components, driven by 90 ° rotation of the disc. At the same time, the hydraulic control station and the lifting cylinder also elevates the weight vertically by lifting the arm and the weight rod, converts the weight of the weight to potential energy, and prepares for closing the valve.

2) Locking: The locking mechanism of the liquid-controlled butterfly valve is composed of transmission cylinder, mechanical locking shaft, electromagnetic locking shaft, electromagnet and other components. It has the function of mechanical electromagnetic interlocking. When the valve is fully open, the driving force of the transmission cylinder drives the machine The locking shaft is put into the locking position for the initial locking, and then the electromagnetic locking shaft is driven by the electromagnetic force of the electromagnet to perform the final locking. The locking process is performed automatically and completely in a series of switches under the action of a series of switches. The huge force of the hammer is completely affected by the mechanical lock bearing. The withdrawal of the mechanical lock shaft is restricted by the electromagnetic lock shaft. The withdrawal of the electromagnetic lock shaft is controlled by the electromagnetic force of the electromagnet. As long as the electromagnet does not lose electricity, its electromagnetic lock The shaft and the mechanical locking shaft are firmly controlled, no matter how long the valve is open, no matter how heavy the weight is, the hammer (the plate) will never fall a trace, to ensure the plate is always open after the open state Flow resistance state), during which no need to fill the oil, make-up measures.

3) off valve: off valve in three cases, A: man-off valve; B: pump or valve failure failure off their own valve; C: loss of off-line off valve. No matter what kind of situation off the valve, just let the electromagnet power loss can be automatically shut down according to a predetermined procedure, electromagnet instantly disappear instantly when electromagnet lose power. Electromagnetic lock shaft once the role of the electromagnetic force is lost immediately unlocked, mechanical lock shaft in the electromagnetic lock axis can unlock the unlocked, then the weight of the hammer that hammer rod, lifting arm, valve shaft and other components driven plate In accordance with the pre-set fast off, buffer, slow off the program for the closing movement, the whole process in one go. During the closing process of the liquid-controlled butterfly valve, the oil in the lower chamber of the lifting cylinder must be excluded. Therefore, the method of controlling and adjusting the discharge speed of the lifting cylinder can effectively control the closing speed of the valve. Liquid-controlled butterfly valve closing process fast off, buffer, slow off three procedures, the fast-off time, slow off time, fast off angle, slow off angle can be adjusted.

 

Product Parts Materials

model

D743H-16

D743W-16P

D743W-16R

Working pressure(MPa)

1.6

Applicable temperature(℃)

≤425

≤200

Suitable media

Water, oil or non-corrosive media

Nitric acid medium

Acetic acid medium

material

Body, disc

WCB

CF8/304

CF3M/316L

Valve stem

2Cr13

304

316L

Body sealing surface

Surfacing 507

Butterfly sealing surface

304+Flexible graphite

304+PTFE

304+PTFE

filler

Flexible graphite

PTFE

PTFE

 

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.