Flow Values And Characteristics - Burkert 2301 Operating Instructions Manual

Technical Data
6.3. flow Values and characteristics
6.3.1. 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. 2: Flow characteristic
Type 2301
40 60 80
stroke [%]
explanation on the flow characteristic:
• Equal-percentage parabolic cone for DN8 – DN50
• Linear cone for nominal widths DN4 and DN6
• Flow characteristic according to DIN/IEC 534-2-4
• Theoretical setting ratio (Kvs/Kvo):
50 : 1 for seats DN8 – DN50
25 : 1 for seat DN6
10 : 1 for seat DN4
• Kvr value* at 5% of the lift for DN
Kvr value at 10% of the lift for DN ≤ 10 mm
* Kvr value = the smallest KV value at which the angularity tolerance
according to DIN/IEC 534-2-4 is still maintained.
6.3.2. flow values
kvs values
Connection- actuator
size size
(flange)
[mm] [mm]
10 70
15 70
100
20 70
25 70
32 90
40 90
50 90
> 10 mm
kvs values
nominal width dn (seat) [mm]
4 6 8 10 15 20 25
0.5 1.2 2.0 2.7 - - -
0.5 1.2 2.1 3.1 4.2 - -
- - - 3.2 5.2 7.5 -
- - - - 5.3 7.0 11.6 -
- - - - - 5.0 9.5 13.6 -
- - - - - - 9.7 13.5 16.7 -
- - - - - - -
english
32 40 50
- - -
- - -
- - -
- -
-
15.8 18.6 27.9
15