Data Sheet for Product

4/8
Siem ens Butterfly valves PN6, PN10, PN16 CM1N4131en
Building Technologies 2017-01-26
Flow diagram
1
2
3
4
5
6
8
10
20
30
40
50
60
80
100
200
300
400
500
1
2 3 4
5
6 8
10 20 30 40 50 60 80
100
0,01 0,02 0,03 0,04 0,05 0,06 0,08 0,1 0,2 0,3 0,4 0,5 0,6 0,8
600
800
1000
2000
3000
150
1500
1
k
V
S
0,25
0,4
0,6
0,3
0,5
0,8
1
1,5
2
2,5
4
6
3
5
8
10
15
20
25
40
60
30
50
80
100
150
200
250
400
600
300
500
800
2
0
0
4
0
0
5
0
7
6
0
1
0
0
0
2
1
0
0
4
0
0
0
4000
10000
5000
6000
8000
8
0
D
N
6
5
8
0
4
0
1
0
0
1
2
5
1
5
0
2
0
0
5
0
Χp
v100
= Differential pressure across the fully open butterfly valve by a volume flow
100
V
%
100
V
%
= Volume flow through the fully open butterfly valve
100 kPa = 1 bar ≡ 10 mWC
1 m
3
/ h = 0.278 l/s water at 20 °C
Engineering notes
The VKF41.. butterfly valves can accommodate flow in either direction.
In heating systems, the valve should preferably be installed in the return, where the
seal will be exposed to lower temperatures, so extending its service life.