Type 2960

11 | 15

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5.

Performance specifications

5.1. Fluidic data

Flow characteristics

Note:

• Modified equal percentage flow characteristic.

• Higher flow values compared to globe control valves

K

v /Kvs [%]

0 10 20 30 40 50 60 70 80 90 100

Stroke[%]

Flow rate of standard control valve

100

90

80

60

50

40

30

20

10

0

70

Overview of fluidic data for flow below seat (for liquids, steam and gases)

Note:

• K

V value [m

3

/h]: measurement with water according to DIN EN 60534 - 2 - 4

• Seat leakage according to DIN EN 60534 - 4

• See “7.2. Bürkert product filter” on page 15

Nominal

diameter

(pipe)

Hand-

wheel

diameter

Ø

Operating pressure max.

leakage class)

K

V value at stroke [m

3

/h]

K

VS

value

Valve seat seal

Stain-

less

steel

PTFE

PEEK

DN

NPS

[mm]

[bar(g)]

[bar(g)]

[bar(g)] 5 %

10 % 20 % 30 % 40 % 50 % 60 % 70 % 80 % 90 % [m3/h]

ASME BPE (12.7 mm x 1.65 mm / 0.5" x 0.065")

15

½

45 (S)

25 (III)

25 (VI)

25 (VI)

0.22

0.24

0.30

0.56

1.2

1.5

1.6

1.6

1.6

1.6

1.6

All standards

15

½

45 (S)

25 (III)

25 (VI)

25 (VI)

0.16

0.17

0.22

0.40

1.2

2.7

3.5

4.0

4.5

4.8

5.0

20

¾

45 (S)

25 (III)

25 (VI)

25 (VI)

0.26

0.27

0.40

1.1

4.0

5.9

7.2

8.3

9.1

9.6

10.0

25

1

45 (S)

25 (III)

25 (VI)

25 (VI)

0.34

0.36

0.62

1.5

5.2

8.9

11.5

13.0

14.2

15.4

16.0

32

1 ¼

110 (M)

25 (III)

25 (VI)

25 (VI)

0.43

0.52

0.82

1.4

4.0

9.3

13.8

16.4

19.2

21.5

23.0

40

1 ½

110 (M)

25 (III)

25 (VI)

25 (VI)

0.48

0.66

1.4

5.1

14.0

20.0

24.5

28.5

31.5

34.5

36.0

50

2

110 (M)

25 (III)

25 (VI)

20 (VI)

0.87

1.2

1.8

4.0

15.2

26.0

35.0

40.5

45.0

48.0

53

65

2 ½

160 (L)

24 (15) 1.)

(III)

24 (15) 1.)

(VI)

14 (VI) 1.) 1.7

2.0

6.5

20.0

35.0

48.0

58

67

75

83

90

1.) According to pressure equipment directive 97/23/EC for compressible fluids of group 1 (dangerous gases and vapours) according to article 3, number 1.3, letter a, first indent)