Proline Prowirl 72F, 72W, 73F, 73W
16
Hauser
Perforated plate flow conditioner
A specially designed perforated plate flow conditioner, available from Hauser, can be installed if it is
not possible to observe the inlet runs required.
The flow conditioner is fitted between two piping flanges and centered with the mounting bolts. Generally,
this reduces the inlet run required to 10 x DN with complete accuracy.
A0001887
The pressure loss for flow conditioners is calculated as follows:
∆
p [mbar] = 0.0085 ·
ρ
[kg/m³] · v² [m/s]
Examples of pressure loss for flow conditioner
Installation of delta heat measurement (Prowirl 73 HART)
• The second temperature measurement takes place by means of a separate sensor and is read in via HART.
• Prowirl 73 generally has to be installed on the steam side for saturated steam delta heat measurement.
• For water-delta heat measurement, Prowirl 73 can be installed on both the cold side and the warm side.
• The inlet and outlet runs specified above must be observed.
A0001809
Layout for delta heat measurement of saturated steam and water
• Example with steam
p = 10 bar abs
t = 240 °C
→ ρ
= 4.39 kg/m³
v = 40 m/s
∆
p = 0.0085 · 4.39 · 40² = 59.7 mbar
• Example with H
2O
condensate (80°C)
ρ
= 965 kg/m³
v = 2.5 m/s
∆
p = 0.0085 · 965 · 2.5² = 51.3 mbar
8 x DN
2 x DN
5 x DN
1
2
