Owner manual

PIPE ORIENTATION AND SENSOR MOUNTING
Figure 2: Orientation and mounting
INSTALLATION INSTRUCTIONS, SINGLE SUPPORT
1. Choose the proper location to install the AHR Ellipse using AGA/ASME standards (or equivalent). See “Location Instructions”
on page 6.
2. Grind the surface of the pipe where the AHR Ellipse is to be inserted to provide a clean area for welding.
3. Weld the supplied weld-o-let to the pipe using standard codes for your application. Protect the threads during the
welding process.
4. Thread the close (short) nipple into the weld connector. Install the supplied 3-piece isolating ball valve.
5. Open the isolating ball valve. Mount the high-pressure drilling machine onto the ball valve. Drill a hole through the pipe
wall according to the following table.
Model / Sensor Weld Connector Drill Bit
AHR (7/8") 1-1/4" 1-1/8"
AHR1 (1-1/4") 1-1/2" 1-3/8"
OTE:N There is no need for a drilling machine if it is not a hot tap installation or if the system is not pressurized.
6. Withdraw the drill bit through the isolating ball valve. CLOSE the ball valve and dismantle the drilling machine. Make sure
there is no leakage at the valve and close nipple connections. The ball valve is to remain completely closed until step 10.
7. Thread the supplied cage (long) nipple into the isolating ball valve. Install the supplied reducer (1-1/4" x 1" coupling) on
the cage nipple.
8. Thread the supplied packing gland onto the reducer.
9. Install the instrument valves (optional) at the pressure connections on the AHR head. Make sure the valves are FULLY
CLOSED before proceeding.
10. Insert the Ellipse AHR through the packing gland and cage nipple until it reaches the isolating ball valve. Slightly tighten
the compression nut of the packing gland and attach the safety chain to the AHR. Open the isolating ball valve and push
the sensor down by hand until it reaches the opposite side of the pipe.
Ellipse® Pitot Tube Meter, AHR Annular Low Pressure Wet Tap Meter
Page 4 April 2014