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Diaphragm multi-function pump control valve
Model: JD745X
Nominal diameter: DN40 ~ 1600mm
Nominal: PN1.0 ~ 2.5MPa
Suitable medium: water, oil, water, sewage
Temperature: 0 ~ 80 ℃
Flange Standard: GB / T17241.6, GB / T9113
Test standards: GB / T13927, API598

First, the multi-function pump control valve Structural features 
 Multi-function pump control valve by the main valve and control valve and take over the system, the valve body with a DC valve, the main valve control chamber for the diaphragm or piston double control room structure, Control room than the general increase of a hydraulic control valve, an increase of the main valve control functions, to achieve a slow opening of the pump outlet, fully open, slow closing, cut-off and other multi-functional control, a valve, a regulation of the pump Multi-outlet control. 
 The product takes over the control system using the valve control, by setting the opening of the control valve can be easily achieved the need for various control parameters, such as the opening of the main valve speed, slow closing speed and so on. 
 
 Second, the principle of multi-function pump control valve 
 When the pump starts, the pressure acting on the main valve plate below the control room and the lower chamber, the pressure to open the main valve, the control room after the water chamber slowly through the control valve B To the outlet, the main valve slowly open. Setting the opening of the control valve results in a proper main valve opening speed. When the pump stops working, the water pressure at the inlet decreases rapidly, most of the opening is quickly closed under dead weight and spring pressure to prevent the water from flowing back. The remaining opening degree is controlled by the combination of the water pressure in the upper chamber and the water pressure in the lower chamber Slowly shut down, slow down the closure of the formation of a buffer to prevent the pressure surge. 
 Set the control valve A, B opening and opening ratio can be a suitable valve opening and closing speed. 
 
 Third, the multi-function pump control valve working characteristics 
 1, to prevent the water hammer effect is good, the slow open, check the closure speed, slow closing, etc. to eliminate water hammer technology integration, to prevent the pump does not hammer and stop the pump back and water hammer Water supply pipe and pump damage. 
 2, easy to operate, no need to reprovision the valve with electronic control system, the valve with the pump to open and stop automatically and in order to complete the control function. By setting the valve opening degree can get the appropriate control parameters. 
 3, the valve body with a full channel, DC, streamlined design. Small hydraulic loss, energy-saving effect. 
 
 four,Multifunctional pump control valve function and purpose 
 The valve is installed at the pump outlet, the order to achieve a slow opening, full open, closed fast, slow closure and other functions. 
 This product is used in high-rise building water supply system and other water supply system of the pump outlet pipeline, to prevent and reduce the water hammer on the pipeline when the water hammer start and stop to prevent water back to protect the pump to maintain pipeline safety.

 

Five, multi-function pump control valve main technical parameters

Nominal pressure (Mpa)

Shell test pressure (MPa)

Seal test pressure (MPa)

Regulating range (MPa)

Slow closing time (S)

Minimum working pressure (MPa)

Suitable media

Medium temperature (℃)

1.0

1.5

1.1

0.09-0.8

3-60 
       (adjustable)

≥0.07

water

0-80


 Sixth, multi-function pump control valve main parts and materials

Part Name

Parts and materials

Body valve cover

WCB

Valve seat disc

Copper alloy / 2Cr13

O-ring seals

Nitrile rubber

Valve stem

2Cr13

spring

50CrVA

Cylinder piston (piston type)

2Cr13

Diaphragm (diaphragm type)

Cloth fabric nitrile rubber

Regulating valve ball valve

Copper alloy

filter

stainless steel


 Seven, multi-function pump control valve parts list:
 1, the main valve 2, the flow control valve 3, the filter


 Eight, multi-function pump control valve connection size

DN

L

H

D (mm)

D1 (mm)

b (mm)

D2 (mm)

n-Φd

mm

mm

PN1.0

PN1.6

PN2.5

PN1.0

PN1.6

PN2.5

PN1.0

PN1.6

PN2.5

PN1.0

PN1.6

PN2.5

PN1.0

PN1.6

PN2.5

40

240

270

150

150

150

110

110

110

18

18

18

88

88

84

4-17.5

4-17.5

4-18

50

240

270

165

165

165

125

125

125

20

20

20

102

102

99

4-17.5

4-17.5

4-18

65

270

340

185

185

185

145

145

145

20

20

22

122

122

118

4-17.5

4-17.5

8-18

80

300

400

200

200

200

160

160

160

22

22

24

133

133

132

8-17.5

8-17.5

8-18

100

350

440

220

220

235

180

180

190

24

24

24

158

158

156

8-17.5

8-17.5

8-22

125

400

460

250

250

270

210

210

220

26

26

26

184

184

184

8-17.5

8-17.5

8-26

150

480

500

285

285

300

240

240

250

26

26

28

212

212

211

8-22

8-22

8-26

200

500

640

340

340

360

295

295

310

28

30

30

268

268

274

8-22

12-22

12-26

250

605

690

395

405

425

350

355

370

28

32

32

320

320

330

12-22

12-26

12-30

300

700

820

445

460

485

400

410

430

28

32

34

370

370

389

12-22

12-26

16-30

350

800

950

505

520

555

460

470

490

30

36

38

430

430

448

16-22

16-26

16-33

400

900

1400

565

580

620

515

525

550

32

38

40

482

482

503

16-26

16-30

16-36

450

1000

1580

615

640

670

565

585

600

32

40

42

532

550

548

20-26

20-30

20-36

500

1100

1600

670

715

730

620

650

660

34

42

44

585

585

609

20-26

20-33

20-36

600

1300

1815

780

840

845

725

770

770

36

48

46

685

685

720

20-30

20-36

20-39

700

1400

2040

895

910

960

840

840

845

40

54

50

800

800

820

24-30

24-36

24-42

800

1500

2350

1015

1025

1085

950

950

990

44

58

54

905

905

925

24-33

24-39

24-48

900

1700

2606

1115

1125

1185

1050

1050

1090

46

62

58

1005

1005

1028

28-33

28-39

28-48

1000

1900

2765

1230

1255

1320

1160

1170

1210

50

66

62

1110

1110

1140

28-36

28-42

28-56

1200

2050

2950

1455

1485

1530

1380

1390

1420

56

52

70

1330

1328

1350

32-39

32-48

32-55

1400

2200

3180

1675

1685

1755

1590

1590

1640

62

58

76

1530

1530

1560

36-42

36-48

36-60

1600

2400

3400

1915

1930

1955

1820

1820

1860

68

64

84

1750

1750

1780

40-48

40-55

40-60


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