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Electric eccentric hemispherical valve


Product model: PQ940F / Y / H

Nominal diameter: DN40 ~ 800mm

Nominal pressure: PN1.0 ~ 4.0Mpa

Applicable temperature: ≤ 425 ℃

Applicable medium: pulverized coal, coal ash, dust and gas

Flange connection dimensions: GB / T 9113.1-2000, ASME / ANSI 16.5

Structure length: GB 12221-2005, ASNE B16.10

Manufacturing and acceptance: GB12237-89, API 6D

Pressure test: JB / T9092-1999, GB / T13927-92, API98


PRODUCT OVERVIEW

Electric eccentric hemispherical valve is a product composed of eccentric hemispherical valve and electric actuator. The product has the advantages of small opening force, stable performance, good sealing, compact structure and so on. The eccentric hemispherical valve uses the eccentric valve body, eccentric ball and valve seat. When the valve rod rotates, it is automatically centered on the common track. The more it is closed, the tighter it is in the closing process, so as to fully achieve the purpose of good sealing. The ball of the valve is completely separated from the valve seat, which eliminates the wear of the sealing ring and overcomes the problem that the traditional ball valve seat and the sealing surface of the ball are always worn. It is suitable for sewage, papermaking, petrochemical industry, natural gas medium, granular fluid and powder solid, especially for steel, aluminum, papermaking, petroleum, metallurgy and other industries.


PRODUCT ADVANTAGES

1. Solve the problem of poor valve sealing caused by precipitation and easy scaling of particles, powder, pulp and other media in metallurgy and paper industry.

2. The switch is light, the ball is separated from the shell when opening without any contact, the starting torque is small and the rotation is flexible. When closed, the squeeze cutting action between the hemisphere and the valve seat can remove the dirt on the sealing surface, so that the valve can be opened and closed smoothly, with high safety factor and good sealing performance.

3. The eccentric structure of the sealing surface can automatically compensate the wear of the spherical surface, ensure the sealing performance of the valve, and 100% will not leak. Using this valve to control the pipeline has high safety performance.

4. This valve is electrically driven, which is very convenient. You can also select the appropriate torque and brand electric actuator according to the customer's working conditions. Remote control can also be selected according to the requirements of working conditions.


MATERIAL OF MAIN PARTS

Serial number

Part name

Material name

1

Body / bonnet

WCB

ZG1Cr18Ni9Ti

ZG0Cr18Ni12Mo2Ti

ZG15Cr1Mo1V

2

sphere

WCB+Hard chromium

1Cr18Ni9Ti
Special surface treatment

0Cr18Ni12Mo2Ti
Special surface treatment

25Cr2Mo1V
Special surface treatment

3

Valve stem

20Cr13

1Cr18Ni9Ti

0Cr18Ni12Mo2Ti

25Cr2Mo1V

4

valve seat

Q235A+PTFE/Surfacing

1Cr18Ni9Ti/PTFE

0Cr18Ni12Mo2Ti/PTFE

25Cr2Mo1V/PTFE

5

filler

Flexible graphite

Flexible graphite

Flexible graphite

Flexible graphite

6

Bolt

35CrmoA

0Cr18Ni9

0Cr18Ni9

15Cr1Mo1V

7

Nut

45

0Cr18Ni9

0Cr18Ni9

20CrMo


电动偏心半球阀(图1)


MAIN OUTLINE AND CONNECTION DIMENSIONS

Nominal pressure

PN(MPa)

Nominal diameter

DN

Dimensions(mm)

L

D

Series 1 / Series 2

D1

D2

D6

b

f

Z-φd

mm

in

Flange

1.0

40

-

125

145

110

85

-

16

3

4-18

50

-

140

160

125

100

-

16

3

4-18

65

-

190

180

145

120

-

18

3

4-18

80

-

178

195

160

135

-

20

3

4-18

100

-

200

215

180

155

-

20

3

8-18

125

-

254

245

210

185

-

22

3

8-18

150

-

267

280

240

210

-

24

3

8-23

200

-

292

335

295

265

-

24

3

8-23

250

-

330

390

350

320

-

26

3

12-23

300

-

390

440

400

368

-

26

4

12-23

350

-

430

500

460

428

-

28

4

16-23

400

-

530

565

515

482

-

28

4

16-25

450

-

580

615

565

532

-

30

4

20-25

500

-

630

670

620

585

-

30

4

20-25

600

-

800

480

725

685

-

34

5

20-30

700

-

900

895

840

800

-

38

5

24-30

800

-

1000

1010

950

905

-

42

5

24-34

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