TECHNICAL DESCRIPTION
MULTICAL
®
61
5512-622 GB/01.2011/Rev. E1
20
6
Pressure Loss
According to OIML R 49 the maximum pressure loss must not exceed 0.63 bar in range Q
1
up to and incl. Q
3
and
max. 1.0 bar at Q
4
respectively. The pressure loss is without anti-pollution check valve.
The pressure loss in a sensor increases with the square of the flow and can be stated as:
p
kv
Q
∆
×
=
where:
Q = volume flow rate [m³/h]
kv = volume flow rate at 1 bar pressure loss [m³/h]
∆
p = pressure loss [bar]
Graph
Q
3
Nom. diameter
kv
Q @ 0.63 bar
[m³/h]
[mm]
[m³/h]
A
1.6
DN15 & DN20
3.2
2.5
B
2.5 & 4 & 6.3
DN20 & DN25
13.4
10.6
C
10 & 16
DN40 & DN50
40
32
D
25
DN65
102
81
E
40
DN80
179
142
Table 6 Pressure loss table
∆
∆
∆
∆
p ULTRAFLOW
®
24
0,01
0,1
1
0,1
1
10
100
1000
Flow [m³/h]
∆∆∆∆
p
[
b
a
r]
A
B
C
D
E
Diagram 2 Pressure loss chart
