Ellipse® Pitot Tube Meter BHL Annular Hot Tap Dual Rod Meter PTT-UM-00516-EN-02 (April 2014) User Manual
Ellipse® Pitot Tube Meter, BHL Annular Hot Tap Dual Rod 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, BHL Annular Hot Tap Dual Rod Meter PIPE ORIENTATION AND SENSOR MOUNTING L H FLOW Field Weld Or Sideways as on Vertical Pipes Field Weld FLOW H L Liquid Air, Gas or Liquid with Proper Bleeding Figure 2: Horizontal pipe installation OR F L O W W F L O 5° Max. 5° Max. H Field Weld L W F L O NNOTE: Preferred flow direction for air and gas is downward. Preferred flow direction for liquid is upward. Illustration represents installation for downward flow.
User Manual INSTALLATION INSTRUCTION, SINGLE SUPPORT 1. Choose the proper location to install the BHL Ellipse using AGA/ASME standards (or equivalent). See “Location Instructions” on page 7. 2. Grind the surface of the pipe where the BHL Ellipse is to be inserted to provide a clean area for welding. 3. Weld the supplied thread-o-let to the pipe using standard codes for your application (1/16" weld gap recommended). Take care to protect the threads during the welding process. 4.
Ellipse® Pitot Tube Meter, BHL Annular Hot Tap Dual Rod Meter 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.
User Manual LOCATION INSTRUCTIONS Straight pipe requirements: 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.
5 6 78 91 0 0 0 0 0 4 3 2 USGPM NOTE: 2" THRU 10" CURVES ARE FOR SCH. 40 PIPE 12" AND ABOVE ARE FOR SCH. STD. PIPE 2 2 H 1 .2 .3 1 .9 .8 .7 .6 .5 .4 3 2 4 3 4 5 6 10 9 8 7 5 6 7 8 91 0 20 ∆P – I N C E S O 90 80 70 60 50 40 30 F H 2O ANNULAR ELLIPSE 100 3 4 5 6 78 9 1 0 0 2 2" 2.5" 3 4 3" 3.5" 4" 5 6 78 9 1 0 0 0 5" 6" 2 3 8" 4 10" 5 6 7 8 91 0 0 0 0 12" 16" 20" 14" 18" 24" 30" WATER 60° F FLOW CURVE Figure 7: Flow curve Control. Manage. Optimize.
