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American standard Check valve

Product details:

This type of Valve's role is only allowed to medium flows in one direction, the direction and stop the flow. This Valve is normally automatic work, in a direction of flow of fluid pressure, the Valve clack open; In the opposite direction of fluid flow, the fluid pressure and Valve clack of the overlap Valve clack ACTS on the seat, thereby cutting off flow. To ensure that the Valve clack can reach every time the seat to the appropriate location, Valve clack design in the hinge mechanism, so that the Valve clack with enough space of a swing, and make the Valve clack real, comprehensive contact with the Valve seat. Valve clack can all made from metal, can be embedded in the metal on leather, rubber, or synthetic coverage, depending on the use of performance requirements.
Size: DN15 - DN800
Material: WCB, 301304316
Pressure: 1.6-6.4 Mpa / 150-900 lb
Connection: flange, thread
Products are widely used in chemical, oil, electricity and engineering facilities, industrial piping and other fields.
Check valve: according to its structure, can be divided into Lift Type Check valve, Swing Check valve and butterfly Check valve 3 kinds. Lift Type Check valve can be divided into Vertical and horizontal two kinds. Swing Check valve can be divided into single type, more than double disc type and valve type 3 kinds. Butterfly Check valve for straight-through processing, the above several kinds of Check valve in the connection form can be divided into the threaded connection, flange connections and welding of three.
The function of the Check valve is used to prevent the backflow medium pipeline. Check valve belong to automatic valve class, opening and closing by medium flow to open or closed. The Check valve is used only for one-way flow of medium pipeline, prevent medium return, in case of an accident. 
Characteristics and advantages 
1, Design and manufacture of products in line with the American National Standard ANSI B16.34, American Petroleum Institute Standard API6D requirements
2, Valve pressure parts using precision casting process casting, beautiful surface quality, no sticky sand, cold traps and other surface defects; stable intrinsic quality, no loose, sand holes, cracks and other internal defects.
3, Swing Check valve rocker built using Swing structure, all Valve opening and closing parts are mounted on the valve body inside, do not penetrate the body, in addition to the flange portion with a gasket or seal ring seal, the whole no leakage point, to eliminate the possibility of leakage Valve.
4, Swing stop valve due to rocker and Valve clack junction structure using spherical connection such Valve clack in the range of 360 ℃ have a certain degree of freedom, there is an appropriate trace position compensation.
5, Swing Check valve sealing sealing surface surfacing alloy (13Cr) or carbide Stellite6, that the use of the fine particles have a medium and not because of erosion and wear out quickly.
Swing Check valve Valve clack around the shaft rotates, the fluid resistance is generally less than Lift Type Check valve, which applies to the case of a larger caliber, the installation location is not limited and is usually mounted in a horizontal line, it applies to the larger diameter occasion. Depending on the number Valve clack can be divided into single lobe Swing, Swing, and double valve Swing Orange Peel three. Univalve Swing Check valve is generally used with medium-caliber occasions. Large diameter pipe selection univalve Swing Check valve, in order to reduce the water hammer pressure, the best use can reduce water hammer pressure slow closing Check valve. Double valve Swing Check valve suitable for medium and large diameter pipeline. Wafer double valve Swing Check valve structure is small, light weight, is a fast Check valve; Orange Peel Swing Check valve applicable with large diameter tubing.

Main parts and materials

NO.

Part name

Qty.

Materials

NO.

Part name

Qty.

Materials

1

body

1

WCB

9

nameplate

1

304

2

valve seat

2

A105+HF

10

gasket

1

304 Stainless steel + Flexible graphite

3

Brake disc

1

WCB+F6

11

cap

1

WCB

4

Valve rod

1

WCB

12

double-screw bolt

 

A193B7

5

gasket

1

A276410

13

nut

 

A1942H

6

nut

1

A276410

14

rings

1

A291035

7

axis pin

1

A276410

15

gasket

1

1008

8

Rivet

2

304

16

screw-plug

1

A276410

Main Connection Dimensions & weight


NPS
D

In

2

2-1/2

3

4

5

6

8

10

12

14

16

18

20

Mm

51

64

76

102

127

152

203

254

305

337

387

438

489

L-L1
(RF-BW)

In

8.00

8.50

9.50

11.50

13.00

14.00

19.50

24.50

27.50

31.00

34.00

38.50

38.50

Mm

203

216

241

292

330

356

495

622

698

787

864

978

978

L2
(RTJ)

In

8.50

9.00

10.00

12.00

13.50

14.50

20.00

25.00

28.00

31.50

34.50

39.00

39.00

Mm

216

229

254

305

343

368

508

635

711

800

876

991

991

D1

In

3.62

4.13

5.00

6.18

7.32

8.50

10.63

12.76

15.00

16.26

18.50

20.98

22.99

Mm

92

105

127

157

186

216

270

324

381

413

470

533

584

D2

In

4.75

5.50

6.00

7.50

8.50

9.50

11.75

14.25

17.00

18.75

21.25

22.75

25.00

Mm

120.5

139.5

152.5

190.5

216

241.5

298.5

362

432

476

540

578

635

D

In

6.00

7.00

7.50

9.00

10.00

11.00

13.50

16.00

19.00

21.00

23.50

25.00

27.50

Mm

152

178

190

229

254

279

343

406

483

533

597

635

699

B

In

0.75

0.88

0.94

0.94

0.94

1.00

1.13

1.19

1.25

1.38

1.44

1.56

1.69

Mm

16

17.5

19

24

25

26

29

31

32

35

37

40

43

N-Φd

In

4-0.75

4-0.75

4-0.75

8-0.75

80.87

-0.87

8-0.87

12-1.00

12-1.00

12-1.13

16-1.13

16-1.25

20-1.25

Mm

4-19

4-19

4-19

8-19

8-22

8-22

8-22

12-25

12-25

12-29

16-29

16-32

20-32

H
(Open)

In

5.31

6.10

6.61

9.37

9-80

10.91

13.35

15.67

20.67

21.77

22-99

26.30

28.03

Mm

135

155

168

235

249

277

339

398

525

553

584

688

712

WT(Kg)

BF

17

21

29

42

69

74

108

177

282

372

570

665

900

BW

13

17

24

36

57

62

96

158

238

324

483

48

782

 

Main Performance Spcification: Test pressure /Mpa

Nominal pressure ( Lb )

150

300

400

600

Shell test

3.0

7.5

10.2

15.0

Sealing test

2.2

5.5

7.5

11.0

The material of valve body

WCB(C)

CF8(P)

CF 8M (R)

WC6/WC9(V)

Working temperature  / ℃

≤ 425

≤ 100

≤ 100

≤ 550

Applicable medium

Water, steam, , oil

nitric acid type

Acetic Acid type

Water, steam,

Execution standard:
Design and manufacture: API 6D-2002
Length of structure: ASME B16.10-1992
Connecting flange: ANSI B16.5
Test and inspection: API 598, API 6D

Main Connection Dimensions: Nominal diameter

150Lb

300Lb

400Lb

600Lb

 

In

Mm

L

H

L

H

L

H

L

H

11/2

40

165

130

241

135

241

135

241

160

2

50

203

135

267

145

292

145

292

170

21/2

65

216

145

292

170

330

170

330

180

3

80

241

175

318

210

356

210

356

245

4

100

292

200

356

260

406

260

432

290

5

125

330

255

400

295

457

295

508

320

6

150

356

320

444

325

495

325

559

360

8

200

495

380

533

380

597

380

660

430

10

250

622

440

622

440

673

440

787

505

12

300

698

480

711

520

762

520

838

555

14

350

787

530

838

540

889

540

889

595

16

400

864

580

864

590

902

590

991

680

18

450

978

620

978

670

1016

670

1092

780

20

500

978

655

1016

720

1054

720

1194

970