Ellipse® Pitot Tube Meter FL OW W ME /O T MO DIA D/β CA /ID DP P TA G SC H/W AL L ER S AHL Annular High Pressure Hot Tap Meter PTT-UM-00326-EN-02 (April 2014) User Manual
Ellipse® Pitot Tube Meter, AHL Annular High Pressure Hot Tap Meter CONTENTS Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
User Manual INTRODUCTION The Preso patented elliptical design outperforms and provides greater accuracy than traditional differential pressure flow measurement devices. This differential pressure flow meter is designed with a series of ports facing the upstream velocity pressures, as well as flow sensing ports strategically located ahead of the trailing edge flow separation. The multi-ported, self-averaging flow element consists of an elliptical shape with two independent flow sensing chambers.
Ellipse® Pitot Tube Meter, AHL Annular High Pressure Hot Tap Meter PIPE ORIENTATION AND SENSOR MOUNTING FLOW H L FLOW METERS W/O MOD/β DIA/ID CAP DP TAG FLOW METERS W/O MOD/β DIA/ID CAP DP TAG SCH/WALL SCH/WALL 10° 10° Field Weld Field Weld 10° 10° FLOW METERS W/O MOD/β DIA/ID CAP DP TAG H FLOW FLOW METERS W/O MOD/β DIA/ID CAP DP TAG SCH/WALL Gas or Liquid with Proper Bleeding SCH/WALL L Liquid Figure 2: Horizontal pipe installation INSTALLATION INSTRUCTIONS, SINGLE SUPPORT 1.
User Manual 8. Install the instrument valves (optional) at the pressure connections on the AHL Annular High Pressure Hot Tap Meter sensor head. Make sure the valves are fully closed before proceeding. 9. Open the isolating ball valve. Insert the AHL Annular High Pressure Hot Tap Meter sensor into the pipe. Use a wrench to turn the threaded insertion rods clockwise until the sensor reaches the opposite pipe wall. 10. Connect the instrument lines to the sensor head valves, then to a gage or transmitter.
Ellipse® Pitot Tube Meter, AHL Annular High Pressure Hot Tap Meter Ellipse Sensor Double Support Pin Guide Ring Figure 4: Double support installation 4. Align the arrow on the sensor head in the direction of flow as shown in Figure 3. 5. Make sure the AHL Annular High Pressure Hot Tap 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.
User Manual LOCATION INSTRUCTIONS Accuracy is affected by the piping configurations due to the disturbances of the flow profile. A fully developed symmetrical flow profile is achieved with the minimum upstream and downstream recommended lengths.
FLOW CURVE 4 3 2 12" 16" 20" 14" 18" 24" 30" WATER 60 °F 5 6 789 100000 5" 6" 2 3 8" 4 10" 5 6 789 10000 USGPM 2" 2 2.5" 3 4 3" 3.5" 4" 5 6 789 1000 5 6 789 1 .2 .3 .4 2 1 .9 .8 .7 .6 .5 3 2 4 3 4 5 6 10 9 8 7 NOTE: 2…10 in. CURVES ARE FOR SCHEDULE 40 PIPE 12 in. AND ABOVE ARE FOR SCHEDULE STANDARD PIPE 2 20 IN O 40 30 ∆P – C H ES 2 ANNULAR ELLIPSE ® 10 OF H 100 90 80 70 60 50 3 4 5 6 789 100 Figure 7: Pressure drops Control. Manage. Optimize.
