TECHNICAL DESCRIPTION flowIQ® 3100
18
Ka st up A/S • Te h i al Des iptio •
5512-1242_D
_GB •
09.2016
7
Pressure loss
According to OIML R49 maximum pressure loss must not exceed 0.63 bar (0.063 MPa) in range Q
1
to Q
3
.
The pressure loss in a meter increases with the square of the flow and can be stated as:
p
kv
Q
where:
Q = volume flow rate [m
3
/h]
kv = volume flow rate at 1 bar (0.1 MPa) pressure loss
Δ
p = pressure loss [bar]
Pressure loss table
Graph
Q
3
[m
3
/h]
Nom. diameter [mm]
K
v
Q at 0.63 bar
[m
3
/h]
B
1.6 & 2.5
DN15, DN20 & DN25
4.3
3.4
C
4.0 & 6.3
DN25
13
10
D
10
DN40
28
22
E
16
DN50
37
29
F
25
DN65
102
81
G
40
DN80
179
142
Pressure loss diagram