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Product Details

Body-mounted Flange Ball Valve

Do you want to provide end-to-end flow control solutions to your clients?
Then you have come to the right place.
We offer better complete range of solution and quality industry valves to match your and your clients' need best. (OEM &ODM manufacturing).
Port: Xiamen
Certification: ISO9001,CE etc.
Price: Negotiable
Payment term: TT, LC
Delivery date: 40days
Packing: export standard
Warranty: 18 months
MOQ: 1 set
Product Details

【Product Introduction】

The top-mounted ball valve is easy and quick to disassemble on the pipeline, and the maintenance is convenient and fast. When the valve fails on the pipeline and needs to be repaired, it is not necessary to remove the valve from the pipeline. It is only necessary to remove the middle flange bolts and nuts, remove the bonnet and stem assembly from the valve body together, and then remove the ball and valve Block assembly. You can repair the ball and valve seat online. This maintenance saves time and minimizes losses in production.


【Features】

The body of the top-mounted ball valve is an integral design, which will not affect the use of our valve because of the expansion and contraction of the pipeline. Both the ball and the valve seat adopt the top-mounted structure. When the valve is repaired, there is no need to remove the valve from the pipeline. It adopts an integrated type, which effectively solves the machining gap between the valve stem and the sphere, ensuring the precise positioning of the sphere and the protection structure of the valve stem against blowout. The sealing form of the valve stem and bonnet is not an ordinary packing seal, but a packing box combination seal is used. The ball and valve seat can adopt PPL or metal hard seal according to customer requirements.


【Product Categories】

Top-mounted ball valves are divided into floating ball valves and fixed ball valves .

Nominal size of bodywork floating ball valve ≤DN200. A compression spring is applied on the sphere, and the compression spring's role is to apply a pretension force on the sphere, so that the sealing surface of the valve seat is in close contact in any case, and the sealing performance is good. The wedge angle of the contact surface of the valve seat and the valve body is 10 °. The valve seat can be self-locked. In the pipeline direction, when the valve seat is subjected to a large pressure, the valve seat will not produce any displacement. Therefore, the valve of this structure has both the characteristics of a gate valve and the advantages of a ball valve . During maintenance inspection, it was found that the valve body and valve seat are prone to leakage. If the preload of the spring is increased , the closing torque of the ball valve is bound to increase . In order not to increase the closing torque of the ball valve , a rubber O-ring is added on the back of the seat sealing surface to solve the leakage problem on the back of the seat sealing surface.

The disadvantage of the top-mounted fixed ball valve is that the spring preload cannot be adjusted and controlled, and the spring compression is large during assembly, making assembly difficult. To solve this problem, ANSI 302 is used instead of 304 for the spring material. ANSI 302 has good spring rigidity, and its corrosion resistance is similar to 304. In addition, a spring seat and an adjustment nut are added. The threads are respectively turned on the outer circle of the valve seat and the spring seat, and the spring is pressed into the spring seat with the adjustment nut, and the valve seat assembly is inserted into the valve body. Since the spring has been compressed before installing the ball, it is convenient to install the ball. After the sphere is assembled, the adjustment nut is withdrawn from the spring seat, and the spring preload on the sphere is small. If you want to increase the preload, you can adjust the adjustment nut.


【Executive Standards】

Design standard GB / T 12237

Structure length standard GB / T 12221

Flange connection standard JB / T 79.1

Inspection and test standard GB / T 26480

Pressure-temperature: GB / T 9131

Product identification: GB / T 12220

【Performance parameters】

Nominal pressure PN (MPa)

case

Test pressure (MPa)

Upper seal

Seal (liquid)

Seal (gas)

1.6

2.4

1.8

0.6

1.8

2.5

3.8

2.8

0.6

2.8

4.0

6.0

4.4

0.6

4.4

6.4

9.6

7.0

0.6

7.0

10.0

15.0

11.0

0.6

11.0

16.0

24.0

18.0

0.6

18.0


【Applicable medium and applicable temperature】

Shell material

Applicable medium

Applicable temperature (℃)

Carbon steel (C type)

Water, steam, oil

≤425

Chromium nickel titanium steel (P type)

Nitric acid

≤200

Chromium nickel molybdenum titanium steel (R type)

Acetic acid

≤200

Chrome Molybdenum Steel (Type I)

Water, steam, oil

≤550


【Materials of main parts】

Valve body, bonnet

Valve plate, valve seat

Stem

Stem nut

filler

Handwheel

Carbon steel

High quality carbon steel + hard alloy or stainless steel

Chrome stainless steel

Aluminum bronze

Graphite asbestos packing

Malleable cast iron

Chromium nickel titanium steel

Stainless steel, stainless steel + hard alloy

Chrome nickel titanium stainless steel

Aluminum bronze

Polytetrafluoroethylene

Malleable cast iron

Chromium nickel molybdenum titanium steel

Stainless steel, stainless steel + hard alloy

Chrome nickel titanium stainless steel

Aluminum bronze

Polytetrafluoroethylene

Malleable cast iron

Chrome-molybdenum steel

Alloy steel + hard alloy

Chrome-molybdenum steel

Aluminum bronze

Flexible asbestos

Malleable cast iron


【Main appearance and connection size】

Nominal diameter

Main external dimensions and connection dimensions

L

D

D1

D2

b

Zd

H

D0

Z41H-16C

15

130

95

65

45

14-2

4-Φ14

170

120

20

150

105

75

55

14-2

4-Φ14

190

140

25

160

115

85

65

14-2

4-Φ14

205

160

32

180

135

100

78

16-2

4-Φ18

270

180

40

200

145

110

85

16-3

4-Φ18

310

200

50

250

160

125

100

16-3

4-Φ18

358

240

65

265

180

145

120

18-3

4-Φ18

373

240

80

280

195

160

135

20-3

8-Φ18

435

280

100

300

215

180

155

20-3

8-Φ18

500

300

125

325

245

210

185

22-3

8-Φ18

614

320

150

350

280

240

210

24-3

8-Φ23

674

360

200

400

335

295

265

26-3

12-Φ23

811

400

250

450

405

355

320

30-3

12-Φ25

969

450

300

500

460

410

375

30-3

12-Φ25

1145

580

350

550

520

470

435

34-4

16-Φ25

1280

640

400

600

580

525

485

36-4

16-Φ30

1452

640

Z41H-25

15

130

95

65

45

16-2

4-Φ14

170

120

20

150

105

75

55

16-2

4-Φ14

190

140

25

160

115

85

65

16-2

4-Φ14

205

160

32

180

135

100

78

18-2

4-Φ18

270

180

40

200

145

110

85

18-3

4-Φ18

310

200

50

250

160

125

100

20-3

4-Φ18

358

240

65

265

180

145

120

22-3

8-Φ18

373

240

80

280

195

160

135

22-3

8-Φ18

435

280

100

300

230

190

160

24-3

8-Φ23

500

300

125

325

270

220

188

28-3

8-Φ25

614

320

150

350

300

250

218

30-3

8-Φ25

674

360

200

400

360

310

278

34-3

12-Φ25

811

400

250

450

425

370

332

36-3

12-Φ30

969

450

300

500

485

430

390

40-4

16-Φ30

1145

580

350

550

550

490

448

44-4

16-Φ34

1280

640

400

600

610

550

505

48-4

16-Φ34

1452

640



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