Badger Meter Model BHL - Manual (Page 6)

8 . Install the instrument valves (optional) at the pressure connections on the BHL Ellipse sensor head . Make sure the valves
are FULLY CLOSED before proceeding .
9 . Open the isolating ball valve . Using a wrench, turn the threaded insertion rods clockwise into the pipe until the sensor
reaches the opposite pipe wall .
10 . Connect the instrument lines to the sensor head valves . Connect these lines to a gage or transmitter .
INSTALLATION INSTRUCTIONS, DOUBLE SUPPORT
OTEE: N For non-hot tap installations only .
1 . Follow steps 1 through 6 in “Installation Instruction, Single Support” on page 5 . 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 deburr,
especially on the inside of the pipe . Size the hole used for the double support according to Table 3 .
Pipe Size Model / Sensor Weld Connector Drill Bit
2"…5" BHL (7/16") 1/8" 3/8"
6"…12" BHL (7/8") 1/2" 1/2"
14"…24" BHL (1-1/4") 1" 7/8"
Table 3: Double support drill bit size
2 . Weld the double support thread-o-let making sure it is centered with the drilled hole (1/16" weld gap recommended) .
3 . Install the BHL Ellipse 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 Pin
4 . Align the arrow on the sensor head in the direction of flow as in step 7, “Installation Instruction, Single Support” on
page 5 .
5 . Check that the BHL Ellipse 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 .
Ellipse® Pitot Tube Meter, BHL Annular Hot Tap Dual Rod Meter
Page 6 April 2014