CiDRA SONARtrac PW VF-100 - Manual (Page 24)

20831-01 Rev 05 Page 5-6
Both tool kits are available from Customer Support. Please contact
them for additional information.
WARNING
EXPLOSION HAZARD - Use of power tools for installation may or
may not be acceptable for use in hazardous areas. Review the
terms of the hot work permit prior to use.
5.4 Sensor Installation Guidelines
The following are general installation guidelines and recommendations
for installing a passive sonar meter sensor.
If the installation location is in a hazardous (classified) area, get a
Hot Work Permit prior to installation of system.
Select locations with well-developed flow profiles.
Avoid installation locations directly after piping configurations that
cause flow jetting.
Install flow sensor upstream of control valves, “T”’s, orifice plates,
and any other severe source of flow disturbance.
Locate the sensor upstream of pipe taps such as those used for
temperature and pressure sensors.
Good piping practices are required near flanges. This includes
good alignment of pipes, and properly sized and installed gaskets
that do not disturb the flow profile.
Table 2 lists the recommended installation distances from flow
disturbances. These recommendations apply to flow measurement
installations.
Feature
Upstream
pipe
diameters
Downstream
pipe
diameters
90 Degree Elbow 15 5
Double Elbow in plane 25 5
Double Elbow out of plane 40 5
Diffuser (expansion) 30 5
Reducer 15 5
Control Valve 40 10
Flange 2 2
Table 3 Recommended Distances From Flow Disturbances
Note: The distances from flow disturbances are guidelines only. In
most cases the volumetric flow meter will provide accurate flow
measurements at distances within these guidelines.