Proline Prowirl 72
3 Installation
E Hauser
15
Outlet runs with pressure and temperature measuring points
If pressure and temperature measuring points are installed after the device, please ensure there is a
large enough distance between the device and the measuring point so there are no negative effects
on vortex formation in the sensor.
A0003780
Fig. 8:
Installation of pressure measuring point (PT) and temperature measuring point (TT)
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 mounting bolts. Generally, this reduces the inlet run required
to 10 x DN with complete accuracy.
A0001887
Fig. 9:
Perforated plate flow conditioner
Examples of pressure loss for flow conditioner
The pressure loss for flow conditioners is calculated as follows:
∆
p [mbar] = 0.0085 ·
ρ
[kg/m³] · v² [m/s]
3.2.6
Vibrations
The correct operation of the measuring system is not influenced by plant vibrations up to 1 g,
10...500 Hz. Consequently, the sensors require no special measures for attachment.
3.2.7
Limiting flow
See the information on Page 59 and 65.
• 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
2
O condensate (80 °C)
ρ
= 965 kg/m³
v = 2.5 m/s
∆
p = 0.0085 · 965 · 2.5² = 51.3 mbar
PT
TT
3...5 x DN
4...8 x DN
Esc
E
-
+
8 x DN
2 x DN
5 x DN
Содержание Proline Prowirl 72
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