3 Installation Proline Prowirl 72 FOUNDATION Fieldbus
14 Endress + Hauser
3.2.5 Inlet and outlet run
As a minimum, the inlet and outlet runs shown below must be observed to achieve the specified
accuracy of the device. The longest inlet run shown must be observed if two or more flow
disturbances are present.
A0001867
Fig. 8: Minimum inlet and outlet runs with various flow obstructions
A Inlet run
BOutlet run
1 = Reduction
2 = Expansion
3 = 90° elbow or T-piece
4 = 2 x 90° elbow, 3-dimensional
5 = 2 x 90° elbow
6 = Control valve
!
Note!
A specially designed perforated plate flow conditioner can be installed if it is not possible to observe
the inlet runs required (see Page 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. 9: Installation of pressure measuring point (PT) and temperature measuring point (TT)
15 x DN 5 x DN
A
1
3
5
2
4
6
A
A
A
A
A
B
B
B
B
B
B
17 x DN + 8 x h
5 x DN
20 x DN
5 x DN
40 x DN 5 x DN
25 x DN
5 x DN
50 x DN
5 x DN
h
PT
TT
3...5 x DN
4...8 x DN
Esc
E
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