Flow Values And Characteristics - Burkert 2301 Manuel D'utilisation

Technical Data
7.6. flow Values and characteristics
7.6.1. flow characteristic
illustration as an example:
The detailed values are listed in the table below.
100
90
80
70
60
50
40
30
20
10
0
0 20
Fig. 6: Flow characteristic
explanation on the flow characteristic:
• Equal-percentage parabolic cone for DN 8 – DN 50
• Linear cone for orifices DN 4 and DN 6
• Flow characteristic according to DIN / IEC 534-2-4
Type 2301
40 60 80
100
stroke [%]
• Theoretical setting ratio (Kv
s
50 : 1 for seats DN 8 – DN 50
25 : 1 for seat DN 6
10 : 1 for seat DN 4
at 5 % of the lift for DN > 10 mm
• Kv value
9)
R
value at 10 % of the lift for DN ≤ 10 mm
Kv
R
7.6.2. flow values
kv values
s
connection- actuator
size size
Orifice dn (seat) [mm]
(flange)
[mm] [mm] 4 6
10 70 0.5 1.2 2.0 2.7 -
15 70 0.5 1.2 2.1 3.1 4.2 -
20 70 - -
25 70 - -
90 - -
32
130 - -
90 - -
40
130 - -
90 - -
50
130 - -
Tab. 8: Kv values
s
Kv value = the smallest Kv value at which the angularity tol-
9)
R
erance according to DIN / IEC 534-2-4 is still maintained.
english
/ Kv ):
o
kv values
s
8 10 15 20 25 32 40
- - - -
- - -
- 3.2 5.2 7.5 - - -
- - 5.3 7.0 11.6 - -
- - - 5.0 9.5 13.6 -
- - - 8.0 13.6 17.8 -
- - - - 9.7 13.5 16.7 -
- - - - 13.6 20.2 23.8 -
- - - - - 15.8 18.6 27.9
- - - -- - 21.0 24.6 37.0
50
-
-
-
-
-
-
17