Type 2973

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5.

Performance specifications

5.1. Flow characteristics

Note:

• The K

V values may vary slightly for different diaphragm materials.

• Further K

V values are available on request.

• Flow: K

V value water (m

3

/h) for elastomer diaphragms

• Measurement at + 20 °C, 4 bar at valve inlet and 3 bar at valve outlet

Forged steel valve body (VS)

Diaphragm

size

Port connection

K

V values [m

3

/h]

DIN EN ISO 1127

ISO 4200

DIN 11866 series B

DIN 11850 series 2

DIN 11866 series A

DIN EN 10357 series A

ASME BPE

DIN 11866

series C

DIN 11850

series 0

BS4825

SMS

3008

DN

[mm]

[inch]

[m3/h]

[m3/h]

[m3/h]

[m3/h]

[m3/h]

[m3/h]

15

10

⅜"

5.5

3.5

–

–

–

–

15

15

½"

6.5

6.5

3.1

–

3.7

–

15

20

¾"

–

–

6.5

–

–

–

20

20

¾"

12.5

12.4

8.4

–

8.9

–

25

25

1"

18

20

15.5

–

15.5

16

40

32

1¼"

–

34

–

–

–

–

40

40

1½"

41

40

37

–

37

38

50

50

2"

66

66

66

–

66

66

50

65

2½"

–

–

66

–

66

66

Tube valve body (VP)

Diaphragm size Port connection

K

V values [m

3

/h]

DIN EN ISO 1127

ISO 4200

DIN 11866 series B

DIN 11850 series 2

DIN 11866 series A

DIN EN 10357 series A

ASME BPE

DIN 11866

series C

DN

[mm]

[inch]

[m3/h]

[m3/h]

[m3/h]

15

10

⅜"

–

–

7.1

15

15

½"

7.2

7.4

–

15

20

¾"

–

7.4

–

20

20

¾"

13.5

–

–

20

25

1"

–

14.9

12.8

25

32

1¼"

–

22.3

–

25

25

1"

20.8

–

–

32

32

1¼"

36

–

–

32

40

1½"

–

34.8

31

40

40

1½"

47.9

–

–

40

50

2"

–

46.2

43

50

50

2"

69.7

–

–

Cast valve body (VG)

Diaphragm size

Port connection

K

V values

DN

[mm]

[inch]

[m3/h]

15

15

½"

5.6

20

20

¾"

10.7

25

25

1"

14.6

40

40

1½"

35

50

50

2"

47