Endress+Hauser Proline Prowirl 73 - Vibrations; Limiting Flow

Proline Prowirl 73 Installation
Endress+Hauser 21
Perforated plate flow conditioner
A specially designed perforated plate flow conditioner, available from Endress+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 × DN with complete accuracy.
A0001887
Fig. 9: Perforated plate flow conditioner
Calculation examples (SI units) for the pressure loss of flow conditioners:
The pressure loss for flow conditioners is calculated as follows:
p [mbar] = 0.0085 ·  [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 to
500 Hz. Consequently, the sensors require no special measures for attachment.
3.2.7 Limiting flow
Information on limiting flow is provided under the "Measuring range" (ä 78) and "Limiting
flow" (ä 86) sections in the Technical Data chapter.
8xDN
2xDN
5xDN
• Example with steam
p = 10 bar abs
t = 240 °C = 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)
= 965 kg/m³
v = 2.5 m/s
p = 0.0085 · 965 · 2.5² = 51.3 mbar
: density of the process medium
v : average flow velocity