Double Offset Butterfly Valve

Double Offset Butterfly Valve

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Application

Product Scope: NPS 2” ~ NPS96” , 10bar ~ 16bar


Features:

Dual-way Sealing

Rubber Seal Embedded in the Body,not Fall off

Position Indication,Show the Open-Close Position

Disc Sealing Surface Welding Stainless Steel,Long Service Life

Butterfly Plate Adopts Frame Structure,High Strength,Small Fluid Resistance

Double Eccentric Structure,Sealing Surface no Easy to Wear and Tear

Self-Lubricating Composite Bearings,Small Friction Resistance


DesignStandard:BS EN593 / BS5155

Face to Face Dimensions:ISO 5752 / EN558 / BS5155

FlangeEnd Dimension :ANSI B16.1 / AWWA C207 / EN1092-2

Coating: Fusion Bonded Epoxy Coating  

Inspection and Test:API 598 / ISO 5208 / EN 12226-2

 


Part

Material

EN Spec.

Body

Ductile Iron

EN-JS1050

Disc

Ductile Iron

Stainless Steel 420

Stainless Steel 431

EN-JS1050

BS970 420S37

BS970 431S29

Stem


Stainless Steel 420

Stainless Steel 431

BS970 420S37

BS970 431S29

O-Ring

EPDM / NBR

Commercial

Hand Wheel

Ductile Iron

EN-JS1050

For materials options not listed,consult factory.

ZhengFeng manufactures valves in more than 50 different alloys.

NPS

In

12

14

16

18

20

24

28

32

36

40

L

mm

178

190

216

222

269

267

292

318

330

410

H

mm

290

298

336

380

390

461

496

568

1765

1890

H1

mm

780

846

859

1003

1106

1200

1403

1449

630

690

A

mm

175

175

210

210

210

210

320

320

348

248

B

mm

334

334

425

425

425

425

620

620

600

600

D0

mm

280

280

320

320

320

320

400

400

400

400













NPS

In

48

56

64

72

80

88

96

104

112

120

L

mm

470

530

600

670

760

800

850

900

950

1000

H

mm

2255

2495

2880

2953

3232

3390

3840

4085

4420

4700

H1

mm

820

950

1100

1125

1232

1400

1655

1730

1910

2050

A

mm

248

368

368








B

mm

600

655

655








D0

mm

400

600

600









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