Metal Seal flabelliform offset motorized ball valve

Group Ball valve
Min. Order 1 piece
Terms of Payment all
Update Time 2017-06-12
Item specifics
Medium Temperature-5℃-+60℃
MediumWater
SealingMetal/ Rubber
Flow PathStraight
End ConnectionFlange
ActuatorManual/ Motorized/ Hydraulic
MaterialDuctile Iron
Description
Our company is the first eccentric semi ball valve manufacturer in China. The valve has the advantage of good overall rigidity, small water head loss, good anti-fouling ability, reliable sealing, long life and so on, suitable for water, oil, gas with high flow rate and high concentrations of impurities, it is the ideal uograde product for traditional gate valve, butterfly valve and other special valve.


A. High valve rigidity: the valve body is spherical, valve core is overall eccentric crankshaft structure,the valve can adapt to high flow rate and large flow working conditions. In the small opening high-pressure difference working conditions, the valve can be without vibration, without noise.

 

B. Valve flow path is straight structure and full-bore design, large flow area, flow resistance is small.Opening and closing structure can meet with two-way flow requirements. When the valve is fully open, valve body flow channel is similar to a straight pipe,regardless of water supply system forward or reverse run, water resistance coefficient is less than 0.1. When valve opening in the 150-850 degree, water head loss and open degree is basically a curve, can accurately adjust the flow.(See water head loss and water head loss coefficient curves).

 

C. The valve can achieve zero-leakage (when forward and reverse "withstand 1.5 times of rated nominal pressure, valve achieves zero leakage), valve adopts eccentric structure, that is valve core rotation center and valve seat installation center has an eccentricity 6 (see below image). When the valve is fully dosed,if close a small angle more (such as 0.5°), the valve seat sealing surface and the valve core sealing surface will interfere, that is, between the two sealing surface will have a great squeezing force, forming a high Sealing pressure ratio, to achieve strict sealing. Valve eccentricity 5 value is determined by arigorous theoretical calculation (hydraulic calculation, eccentric shaft bending stiffness, torsional stiffness calculation, the crown and the valve seat deformation calculation), and not less than 20 tests, to meet the valve two-way sealing requirements.


D. Sealing surface will not be worn

Due to the eccentric structure,and eccentricity take full account of the hydraulic characteristics of the fluid and the mechanical properties of the material, when valve opens, valve core turned a small angle (such as 0.5 °), the valve core will leave valve seat sealing surface, when the valve is closing, the valve core and valve seat contact each other at the last moment, thereby reducing abrasion. 

When valve is fully open, the valve core sealing surface "hidden" in the valve body, not directly scoured by the fluid. Metal seal valve sealing surface adopts stainless steel laser quenching process, the valve seat sealing surface using pure nickel welding process, the two materials with a reasonable hardness, run-in good,resistance to strong erosion.

Metal seal valve seat could float in a certain range, can compensate the abrasion error of processing,assembly. Rubber seal valve is fully coated with NBR, anti-abrasion,anti-corrosion

E. Sealing surface has the ability of self-clean.

The valve can shear off deposit dirt near the sealing surface each time when valve is closing

F. Valve structure is compact,easy to operate, easy to assemble and disassemble, easy to maintain, Smaller form factor. Size is small. 

Valve is composed by valve body,bonnet, seat, eccentric crankshaft and sealing parts and others, a small number of parts, compact structure.

Valve structure length,installation height and other dimensions are smaller than gate valve, globe valve and other valves.

Valves can be on-line maintained, that is without removing valve from pipe line, remove the bonnet bolts, remove the bonnet, we can replace any parts inside valve.

S.N.

Name

Material

Material Code

Metal seal

Rubber seal

Metal seal

Rubber seal

1

Valve body

Ductile iron

Ductile iron

QT450-12

QT450-12

2

Offset semi ball

Ductile iron

Ductile iron coated with rubber

QT450-12

QT450-12 + NBR

3

Spherical cap

SS steel

 

1Cr18Ni9

 

4

Fastener

SS steel

SS steel

A2-70

A2-70

5

Valve seat

SS steel

 

1Cr18Ni9

Ni

6

Clamp ring

Ductile iron

 

QT400-10

 

7

Bonnet

Ductile iron

Ductile iron

QT450-12

QT450-12

8

Upper bearing

Bronze

Bronze

ZCuAl10Fe3

ZCuAl10Fe3

9

Seal assembly

NBR

NBR

NBR

NBR

10

End bearing

Bronze

Bronze

QSn6.5-0.1

QSn6.5-0.1

11

Lower bearing

Bronze

Bronze

ZCuAl10Fe3

ZCuAl10Fe3

DN

Boundary Dimension

Connection Dimension

PN10

PN16

PN25

L

H

ΦB

D

D1

n-Φd

b

D

D1

n-Φd

b

D

D1

n-Φd

b

100

130

410

206

220

180

8-18

22

220

180

8-18

22

235

190

8-22

24

125

254

370

235

250

210

8-18

22

250

210

8-18

22

270

220

8-26

26

150

267

420

264

285

240

8-22

24

285

240

8-22

24

300

250

8-26

28

200

312

540

345

340

295

8-22

24

340

295

12-22

24

360

310

12-26

30

250

330

600

380

395

350

12-22

26

405

355

12-26

26

425

370

12-30

32

300

396

665

442

445

400

12-22

26

460

410

12-26

28

485

430

16-30

34

350

430

740

513

505

460

16-22

26

520

470

16-26

30

555

490

16-33

38

400

530

860

604

565

515

16-26

26

580

525

16-30

32

620

550

16-36

40

450

580

896

634

615

565

20-26

28

640

585

20-30

40

670

600

20-36

46

500

660

1020

766

670

620

20-26

28

715

650

20-33

44

730

660

20-36

48

600

840

1185

936

780

725

20-30

34

840

770

20-36

54

845

770

20-39

58

700

850

947

1045

895

840

24-30

34

910

840

24-36

40

960

875

24-42

50

800

1000

1436

1140

1015

950

24-33

36

1025

950

24-36

42

1085

990

24-48

54

900

1100

1520

1344

1115

1050

28-33

38

1125

1050

28-39

44

1185

1090

28-48

58

1000

1200

1645

1380

1230

1160

28-33

38

1255

1170

28-42

46

1320

1210

28-55

62

1200

1346

2055

1614

1455

1380

32-39

44

1485

1390

32-48

52

1530

1420

32-55

70

1400

1460

2130

1765

1675

1590

36-42

48

1685

1590

36-48

58

1755

1640

36-60

76

1600

1500

2280

1850

1915

1820

40-48

52

1930

1820

40-55

64

1975

1860

40-60

84

1800

1800

3042

2340

2115

2020

44-48

56

2130

2020

44-55

68

 

 

 

 

2000

2200

3780

2675

2325

2230

48-48

60

2345

2230

48-60

70