RMG TME400-VMF - Pressure Loss

1 Introduction
Manual TME400-VMF · EN02 · 2018 September 6th
31
200
4000
1:20
2
1
300
200
4000
1:20
2
1
325
6500
1:20
2
1
400
325
6500
1:20
2
1
500
10000
1:20
2
1
500
500
10000
1:20
2
1
800
16000
1:20
2
1
600
800
16000
1:20
2
1
1250
25000
1:20
2
1
1.4.2.10.
Pressure loss
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 formu-
la:
4
2
m
p
DN
Q
Zp =
where: p pressure loss [mbar]
Zp coefficient of pressure loss [-]
 density [kg/m³]
Q
m
volume flow rate at measurement conditions [m³/h]
DN nominal diameter [mm]
Device type
Z
p
Turbine meter TME400
5040
Perforated plate straightener L1 according to ISO/DIN
3150
Perforated plate straightener L2 according to ISO/DIN
6300
Perforated plate straightener L3 according to ISO/DIN
9450
Perforated plate straightener LP-35 RMG standard
1260
Bend straightener RB 19 according to ISO/DIN
1260
The values for Z
p
are rough averages. The exact value is calculated from the pres-
sure loss, which is determined when testing the meter.