Badger Meter PVC Tee - 1 1/2 to 4"" - Manual (Page 4)

Series 228PV Plastic Tee Type Impeller Flow Sensor
MECHANICAL INSTALLATION
Depressurize and vent the piping system prior to any installation or maintenance of the flow sensor.
General Information
The accuracy of flow measurement for all flow measuring devices is highly dependent on proper location of the sensor in
the piping system. Irregular flow velocity profiles caused by valves, fittings, pipe bends, or other obstructions can lead to
inaccurate overall flow rate indications, even though local flow velocity measurement may be accurate. A sensor located
in the pipe where it can be affected by air bubbles, floating debris, or sediment may not achieve full accuracy and could
be damaged. Badger Meter flow sensors are designed to operate reliably under adverse conditions, but the following
recommendations should be followed to ensure maximum system accuracy:
•
Choose a location along the pipe where 10 pipe diameters upstream and 5 pipe diameters downstream of the sensor
provide no flow disturbance. Pipe bends, valves, other fittings, pipe enlargements and reductions should not be present
in this length of pipe.
• The preferred location for the sensor around the circumference of a horizontal pipe is at the 12 o'clock position. The
sensor should never be located at the bottom of the pipe, as sediment may collect there. Locations off top dead
center cause the impeller friction to increase, which may affect performance at low flow rates and increase wear. Any
circumferential location is correct for installation in vertical pipes, with rising flow preferred to reduce the effects of any
trapped air.
Mechanical Installation Procedure
1. Note the intended direction of flow as indicated by arrows on the tee. There must be free, unrestricted pipe for at least
10 diameters upstream and 5 diameters downstream of the tee.
2. Remove the clevis pin and remove the sensor from the tee.
3. Properly clean the pipe ends and tee sockets.
4. Use solvent cement to attach the pipe to the tee.
5. Reinstall the sensor in the tee as follows:
a. Align the flow arrow on the top of the sensor housing in the direction of flow.
b. Carefully press the sensor straight into the tee.
c. Install the clevis pin through the tee, the sensor, and the conduit cap, and install the cotter ring.
Page 4 January 2013