BROEN ASIA PACIFIC
Balancing Valves
BALLOREX® S Balancing Valves
DIMENSIONING
Dimensioning of the valve

If the water flow (Q) through the valve and the pressure drop (Dp) over the valve are known, the Kv - value of the valve can be calculated according to the Kv - formula:

Kv-formula

From this the valve size and the setting can be identified from the table below. As an alternative, the water flow and pressure drop can be filled in the rating graphs which follow.

 

Number of rotations on the adjustment screw

Valve capacity Kv for BALLOREX® S balancing valves stated in m3/h (at Dp = 1 bar and ambient temp. = 20ºC)

Nominal diameter DN

DN

10/15

20

25

32

40

50

65

80

100/125

150

1

0,13

0,39

0,57

0,34

1,40

0,59

1,20

2,50

5,00

25

2

0,26

0,73

1,10

0,77

2,00

1,90

2,50

5,20

9,00

35

3

0,46

1,10

1,80

1,30

2,60

3,00

3,90

7,40

12,0

44

4

0,72

1,60

2,30

1,90

3,30

4,10

5,10

9,50

16,0

52

5

1,00

2,20

3,10

2,30

4,10

5,30

6,50

11,0

20,0

60

6

1,40

2,60

3,90

2,90

4,80

6,40

7,60

14,0

24,0

67

7

1,80

3,20

4,70

3,50

5,60

7,50

8,50

16,0

29,0

76

8

1,80

3,80

5,60

4,20

6,40

8,80

10,0

18,0

33,0

83

9

1,80

4,50

6,50

4,90

7,20

10,1

11,0

20,0

37,0

93

10

1,80

4,70

7,30

5,60

8,10

11,4

13,0

22,0

42,0

102

11

-

-

-

6,30

9,00

12,8

14,0

25,0

46,0

112

12

-

-

-

7,10

10,1

14,3

15,0

28,0

52,0

120

13

-

-

-

8,00

11,1

15,9

16,0

31,0

58,0

130

14

-

-

-

8,80

12,2

17,6

18,0

34,0

64,0

138

15

-

-

-

9,70

13,4

19,4

20,0

36,0

72,0

150

16

-

-

-

10,6

14,6

21,1

21,0

39,0

80,0

160

17

-

-

-

11,3

15,8

22,9

23,0

42,0

88,0

174

18

-

-

-

11,3

17,1

24,8

25,0

46,0

96,0

186

19

-

-

-

-

17,1

-

27,0

49,0

105,0

200

20

-

-

-

-

18,4

-

29,0

52,0

110,0

211

21

-

-

-

-

-

-

30,0

56,0

120,0

225

22

-

-

-

-

-

-

32,0

60,0

130,0

237

23

-

-

-

-

-

-

34,0

64,0

140,0

251

24

-

-

-

-

-

-

36,0

69,0

150,0

264

25

-

-

-

-

-

-

38,0

75,0

-

279

26

-

-

-

-

-

-

40,0

80,0

-

292

27

-

-

-

-

-

-

43,0

87,0

-

307

28

-

-

-

-

-

-

45,0

-

-

320

29

-

-

-

-

-

-

48,0

-

-

335

30

-

-

-

-

-

-

50,0

-

-

-

Rating Graphs

Example

Given: Water flow (Q) = 1,3 m3/h.

Pressure drop (Dp) = 16 kPa.

Wanted: Valve size and setting.

Fill in the two values in the graph below and connect the dots with a line. The readings of the value is 3,3 m3/h. From this dot draw a horizontal line that intersects the adjusting scale from DN 20 to DN 50. Select the smallest valve size or the one that fits the pipe size, and read the setting. In this case: select DN 20 with setting 7,1. 

Rating graph for BALLOREX® S DN 10/15 -50

Rating graph for BALLOREX® DN 10/15-50

Rating graph for BALLOREX® DN 65-150

Rating graph for BALLOREX® DN 65-150

Click here for installation guide