CALCULATION PROCEDURE for VARIABLE AREA FLOWMETERS
ACCORDING TO VDI/VDE 3513 PART 1
Create by
: /
Order no. : 0.0010
Last modification
: Lucia / 29/5/2019
CONE AND FLOAT DATA
Type
Cone size
Cone
Float shape
Float material
Density of float
Diameter of float
Mass of float
Alpha/Ru-List
: VA40
: 25
: N 21.09
: A III 21 guided
: Stainless steel
: 7.94 g/cm³
: 28.27 mm
: 130.2 g
: KVC_AIIIN_ARU
PHYSICAL DATA OF FLUID
Origin fluid
Density
Density(Operation)
Viscosity
Temperature
Pressure
Compr. factor
:
:
:
:
:
:
:
methane (CH4)
1.67 kg/m³ operation
0.00167 kg/l
0.01092 mPa.s
80.0 °C
3.5 bar gauge
1.0
Reference fluid
Density
Density(Operation)
Viscosity
Temperature
Pressure
Compr. factor
: Luft / Air
:
1.293 kg/m³ standard
: 0.001205 kg/l
:
0.0181 mPa.s
:
20.0 °C
:
1.013 bar abs.
:
1.0
Ruppel No. 10*E-3
alpha/M
:
:
0.0074713
0.0067295
Ruppel No. 10*E-3
alpha/M
:
:
FLOWLIST
ORIGIN
FLOW
[m³/h] norm.
REFERENCE
FLOW
[m³/h] norm.
( norm. 1,013 bar abs; 0°C )
54.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
10.0
5.4
16.930
15.680
14.120
12.570
11.000
9.444
7.884
6.320
4.762
3.199
0.000
0.01458
0.0079228