Badger Meter AHL-GD - Hot Tap, High Pressure (2 to 72")" - Manual (Page 6)

Ellipse® Pitot Tube Meter, AHL-GD Differential Pressure Flow Meter
Page 6 April 2014
INSTALLATION INSTRUCTIONS, DOUBLE SUPPORT
1 . Follow steps 1 through 6 in the single support section . At 180° from and on the same plane as the previously drilled hole,
grind the surface of the pipe to provide a clean area for welding . Drill a hole and de-burr, especially on the inside of the
pipe . The hole used for the double support should be sized according to Table 3 .
Model/Sensor Weld Connector Drill Bit
AHL-GD (7⁄8 in .) 1/8 in . 3/8 in .
AHL-GD(1-1/4 in .) 1 in . 7⁄8 in .
Table 3: Double support drill bit size
2 . Weld the double support thread-o-let making sure that it is centered with the drilled hole (1/16 in . weld
gap recommended) .
3 . Install the AHL-GD Differential Pressure Flow Meter sensor through the two holes . Make sure that the double support pin
passes through the guide ring . See Figure 5 .
Ellipse Sensor
Double Support Pin
Guide Ring
Figure 5: Double support installation
4 . Align the arrow located on the sensor head in the direction of flow as shown in Figure 4 .
5 . Ensure that the AHL-GD Differential Pressure Flow Meter is in the correct orientation and spans the inside of the pipe .
Tighten the threaded insertion rods until the sensor reaches the other end of the pipe .
6 . Install the plug into the end of the double support thread-o-let . Tighten the plug to prevent leakage .