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DownLoad Catalogue

R&D / Butterfly Valve Cv

SIZE

10°

20°

30°

40°

50°

60°

70°

80°

90°

DN40

0.06

3

7

14

25

36

51

70

76

DN50

0.1

5

12

24

45

64

90

125

135

DN65

0.2

8

20

37

65

98

144

204

220

DN80

0.3

12

22

39

70

116

183

275

302

DN100

0.5

17

36

78

139

230

364

546

600

DN125

0.8

29

61

133

237

392

620

930

1022

DN150

2

45

95

205

366

605

958

1437

1579

DN200

3

89

188

408

727

1202

1903

2854

3136

DN250

4

151

320

694

1237

2047

3240

4859

5340

DN300

5

234

495

1072

1911

3162

5005

7507

8250

DN350

6

338

715

1549

2761

4568

7230

10844

11917

DN400

8

464

983

2130

3797

6282

9942

14913

16388

DN450

11

615

1302

2822

5028

8320

13168

19752

21705

DN500

14

791

1674

3628

6465

10698

16931

25396

27908

DN600

22

1222

2587

5605

9989

16528

26157

39236

43116

DN700

30

1663

3522

7630

12599

20036

30482

46899

58696

DN800

45

2387

4791

8736

13788

20613

31395

48117

68250

DN900

60

3021

6063

11055

17449

26086

39731

60895

86375

DN1000

84

4183

8395

15307

24159

36166

55084

84425

119750

DN1200

121

5981

12001

21890

34548

51718

78770

120728

171243

Definition of Cv Valve:
The valve Cv is the flow rate (in US gal/min) of pure water at 60 o F passing
through the valve when the valve disc is fully opened and the pressure differential
between the tow ends of the valve is 1Lbf/in 2. 
Cv=V 〔 G/ ( P 1 -P 2 ) 〕 1/2 
V--- Max. flow (in US gal/min)
P1 --- inlet side pressure (1Lbf/in 2)
P2 --- Outlet side pressure (1Lbf/in 2)
G--- Specific gravity (1 for water)