Type 2961

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5.

Performance specifications

5.1. Fluidic data

Flow characteristics

• Flow characteristic according to DIN EN 60534 - 2 - 4

• K

VR value at 5 % of stroke for DN > 10 mm

K

VR value at 10 % of stroke for DN ≤ 10 mm

• K

VR value = smallest KV value, at which the tilt tolerance according to DIN EN 60534 - 2 - 4 is still maintained.

100

90

80

70

60

50

40

30

20

10

0

0

10

20

30

40

50

60

70

80

90 100

Stroke [%]

Equal percentage flow curve - detailed values please see below

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

• Bürkert product filter(see “7.2. Bürkert product filter” on page 17)

• Info: Rules for decimal places implemented according to works standard

Nominal

diameter

(pipe)

Seat

size

Hand-

wheel

dia-

meter

Ø

Operating pressure

max. CF A

(Seat leakage class)

Theo-

retical

range-

ability

K

V value at stroke [m

3

/h]

K

VS

value

Seat seal

Stain-

less

steel

PTFE PEEK

DN NPS

[mm]

[bar(g)]

5 %

10 % 20 % 30 % 40 % 50 % 60 % 70 % 80 % 90 % 100 % [m3/h]

10

¾ 1.)

3

45 (S)

25 (II) –

–

10:1

–

0.005 0.009 0.013 0.019 0.026 0.034 0.044 0.060 0.077 0.098

0.1

3

45 (S)

25 (II)

20:1

–

0.009 0.015 0.023 0.033 0.046 0.063 0.085 0.11

0.16

0.22

0.2

4

45 (S)

25 (II)

30:1

–

0.023 0.033 0.049 0.070 0.097 0.14

0.18

0.26

0.35

0.49

0.5

6

45 (S)

25 (II) 25 (VI) 25 (VI) 50:1

0.005 0.007 0.011 0.045 0.085 0.16

0.26

0.41

0.65

1.1

1.25

1.25

8

45 (S)

25 (II) 25 (VI) 25 (VI)

0.060 0.070 0.090 0.12

0.18

0.26

0.42

0.61

0.92

1.5

2.0

2.0

10

45 (S)

25 (II) 25 (VI) 25 (VI)

0.090 0.11

0.13

0.19

0.30

0.48

0.73

1.0

1.6

2.3

2.7

2.7

15

½2.)

3

45 (S)

25 (II) –

–

10:1

–

0.005 0.009 0.013 0.019 0.026 0.034 0.044 0.060 0.077 0.098

0.1

3

45 (S)

25 (II)

20:1

–

0.009 0.015 0.023 0.033 0.046 0.063 0.085 0.11

0.16

0.22

0.2

4

45 (S)

25 (II)

30:1

–

0.023 0.033 0.049 0.070 0.097 0.14

0.18

0.26

0.35

0.49

0.5

6

45 (S)

25 (II) 25 (VI) 25 (VI) 50:1

0.005 0.007 0.011 0.045 0.085 0.16

0.26

0.41

0.65

1.1

1.25

1.25

8

45 (S)

25 (II) 25 (VI) 25 (VI)

0.070 0.080 0.11

0.13

0.19

0.27

0.43

0.63

0.95

1.6

2.1

2.1

10

45 (S)

25 (II) 25 (VI) 25 (VI)

0.090 0.11

0.15

0.19

0.31

0.49

0.75

1.1

1.7

2.5

3.1

3.1

15

45 (S)

25 (II) 25 (VI) 25 (VI)

0.14

0.17

0.22

0.35

0.52

0.80

1.2

1.8

2.7

3.7

4.3

4.3

20

¾2.)

10

45 (S)

25 (II) 25 (VI) 25 (VI) 50:1

0.10

0.12

0.15

0.19

0.30

0.46

0.67

1.0

1.5

2.1

2.8

2.8

15

45 (S)

25 (II) 25 (VI) 25 (VI)

0.13

0.17

0.21

0.32

0.48

0.71

1.0

1.5

2.3

3.4

4.4

4.4

20

45 (S)

25 (II) 25 (VI) 25 (VI)

0.19

0.24

0.29

0.42

0.64

0.97

1.4

2.0

2.9

4.2

5.9

5.9

1.) Deviation for port connections according to ASME BPE: the next largest Nominal diameter (port connection) is used, e.g. NPS 1 instead of NPS ¾.

2.) According to the Pressure Equipment Directive 97/23/EC for compressible fluids of Group 1 (hazardous gases and vapours according to Article 3 No. 1.3 letter a first dash)