2671

centric type

p. 3/14

Size

Disc angle (open degree)

mm

inch

10°

20°

30°

40°

50°

60°

70°

80°

90°

40

1½"

0.8

2.8

8.0

16.6

25

42

69

94

132

50

2"

1.2

4.4

11.9

25

44

70

117

154

225

65

2½"

2.3

8.7

21

40

71

111

218

280

368

80

3"

2.9

11.4

30

56

97

147

250

395

497

100

4"

4.4

17.0

45

84

139

258

422

709

845

125

5"

7.6

28

72

138

253

460

700

1214

1454

150

6"

11.7

47

111

204

381

634

1021

1474

2175

200

8"

22

74

193

358

670

1164

1833

2702

3655

250

10"

32

118

286

527

978

1710

2636

3809

5565

300

12"

39

150

365

719

1330

2486

3800

5839

8257

350

14"

54

190

456

930

1752

3010

4656

6726

9733

400

16"

72

270

594

1260

2308

3955

6300

9475

13405

450

18"

87

299

726

1413

2708

4592

7407

11084

15926

500

20"

120

404

1005

1979

3610

6257

9960

15337

21935

550

22"

146

489

1215

2394

4368

7571

12051

18557

26541

600

24"

162

577

1349

2795

5225

8846

13975

21162

29503

650

26"

190

677

1583

3280

6131

10381

16401

24836

34626

700

28"

223

771

1958

3772

7008

12471

20407

29476

43080

750

30"

237

819

2079

4001

7434

13229

21648

31270

45702

800

32"

300

1138

2693

5303

9634

16523

26934

36987

53814

900

36"

384

1466

3451

6858

12647

21275

34814

50184

71421

950

38"

538

2024

4703

8400

14238

23166

38013

57704

72715

1000

40"

596

2245

5213

9308

15787

25668

42120

63939

80582

1050

42"

657

2475

5748

10262

17406

28299

46437

70493

88842

1100

44"

721

2716

6308

11263

19103

31058

50965

77366

97505

1200

48"

858

3232

7507

13404

22734

36962

60652

92073

116039

Cv values – valve sizing coefficient

Cv value denotes the flow rate in M3/hr for water at 68°F (20°C) flowing under a pressure differential 1Kg/cm3.