Endress+Hauser prowirl 77 - Page 11

Installation site
The Prowirl 77 can be mounted in any
position in the piping. An arrow on the
meter body shows the direction of flow.
For measuring liquids in vertical pipes,
the meter should be installed in upward
flow direction (Position A) to ensure a full
pipe.
For horizontal pipelines positions B, C
and D are possible. With hot piping
(e.g. steam), position C or D must be
selected in order to respect the maximum
permissible ambient temperature at the
electronics. For ambient temperatures see
Technical Data, page 56.
Pressure and temperature
measurement points
Pressure and temperature measurement
points are to be mounted
downstream of
the Prowirl 77 so that they affect vortex
formation as little as possible.
Pipeline insulation
wafer/flanged version
Pipeline insulation is often used to
prevent energy loss in hot processes.
Caution!
When insulating, ensure that sufficient
pipe stand surface area is exposed. The
exposed area serves as a radiator and
protects the electronics from overheating.
ba037y07
A
B
C
D
Fig. 4
Orientation
ba037y08
Fig. 5
Mounting pressure and
temperature sensors
ba037y26
Applies to both the wafer and
flanged versions
max.
5 mm
Fig. 6
Pipeline insulation
wafer/flanged version
Caution!
Prowirl 77 PROFIBUS-PA 3 Mounting and Installation
Endress+Hauser 11