RMG TME 400-VM Operating Manual page 38

1 Introduction
250
300
400
34
500
600
1.4.2.10
The measuring parts for determining pressure loss are 1 x DN upstream and down-
stream of the meter. The pressure loss is calculated according to the following for-
mula:
where:
Device type
Turbine meter TME 400
Perforated plate straightener L1 according to ISO/DIN
Perforated plate straightener L2 according to ISO/DIN
Perforated plate straightener L3 according to ISO/DIN
Perforated plate straightener LP-35 RMG standard
Bend straightener RB 19 according to ISO/DIN
The values for Z
sure loss, which is determined when testing the meter.
Manual TME400-VMF · EN11 · January 22nd, 2024
125 2500 1:20
125 2500 1:20
200 4000 1:20
200 4000 1:20
325 6500 1:20
325 6500 1:20
500 10000 1:20
500 10000 1:20
800 16000 1:20
800 16000 1:20
1250 25000 1:20
Pressure loss
pressure loss
∆p
Z coefficient of pressure loss
p
ρ density
Q volume flow rate at measurement conditions [m³/h]
m
DN nominal diameter
are rough averages. The exact value is calculated from the pres-
p
2
2
2
2
2
2
2
2
2
2
2
Q 2
p Z
∆ = ⋅ ⋅ ρ
m
p
4
DN
1
1
1
1
1
1
1
1
1
1
1
[mbar]
[-]
[kg/m³]
[mm]
Z
p
5040
3150
6300
9450
1260
1260