Pressure Loss - RMG TME400-VM VMF Series Operating Manual

300 200 4000
325 6500
400 325 6500
500 10000
500 500 10000
800 16000
600 800 16000
1250 25000

Pressure loss

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:
Dp
where: pressure loss
Z coefficient of pressure loss
p
r
density
Q volume flow rate at measurement conditions [m³/h]
m
DN nominal diameter
Device type
Turbine meter TME400
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 are rough averages. The exact value is calculated from the pres-
p
sure loss, which is determined when testing the meter.
1:20 2
1:20 2
1:20 2
1:20 2
1:20 2
1:20 2
1:20 2
1:20 2
2
Q
D = × × r
p Z m
p
4
DN
Manual TME400-VMF · EN07 · December, 7
1 Introduction
1
1
1
1
1
1
1
1
[mbar]
[-]
[kg/m³]
[mm]
Z
p
5040
3150
6300
9450
1260
1260
th
2020
33