3.3 Mounting the Flowmeter
Caution!
Note the following points before installing the flowmeter:
• Remove all packaging used for transport and protective coverings from the
flowmeter before installing the flowmeter in the pipeline.
• Ensure that the inner diameters of the gaskets are identical or larger than those of
the meter body and process piping. Gaskets which protrude into the flow affect
vortex formation behind the bluff body and lead to inaccurate measurement.
Therefore, the gaskets delivered by E+H come with a slightly bigger inner diameter
than the measuring pipe.
• Ensure that the direction of the arrow on the meter body agrees with the direction of
flow in the pipeline.
• Face-to-face lengths:
– Prowirl W (wafer version): 65 mm
– Prowirl F (flanged version) → see page 50
– Prowirl H (high pressure version) → see page 52
Mounting Prowirl W
Mounting the wafer is carried out using a mounting set consisting of:
• bolts
• centering rings
• nuts
• washers
• gaskets
Caution!
ba037y33
bolt
washer
nut
centering ring
gasket
Fig. 9
Mounting the Prowirl W wafer
version
Prowirl 77 PROFIBUS-PA 3 Mounting and Installation
Endress+Hauser 13
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