Ellipse® Pitot Tube Meter ASF Annular Flanged Steam Meter PTT-UM-00522-EN-02 (April 2014) User Manual
Ellipse® Pitot Tube Meter, ASF Annular Flanged Steam Meter CONTENTS Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
User Manual INTRODUCTION The patented Preso 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, ASF Annular Flanged Steam Meter PIPE ORIENTATION AND SENSOR MOUNTING FLOW Field Weld Preferred installation Allowable plane of installation Figure 2: Horizontal pipe installation OR F L O W F L O W OR F L O W W F L O Field Weld NNOTE: Illustration represents installation for downward flow. Figure 3: Vertical pipe installation For General Steam Applications NNOTE: Instrument valves should be mounted at the same elevation to maintain equal condensation levels.
User Manual INSTALLATION INSTRUCTIONS, SINGLE SUPPORT 1. Choose the proper location to install the ASF Ellipse using AGA/ASME standards (or equivalent). See "Location Instructions" on page 7. 2. Grind the surface of the pipe where the ASF Ellipse is to be inserted to provide a clean area for welding. 3. Drill a hole through the pipe wall according to Table 2.
Ellipse® Pitot Tube Meter, ASF Annular Flanged Steam Meter INSTALLATION INSTRUCTIONS, DOUBLE SUPPORT 1. Follow steps 1 through 4 in "Installation Instructions, 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.
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 4 2 USGPM 1 .2 .3 1 .9 .8 .7 .6 .5 .4 3 2 NOTE: 2" THRU 10" CURVES ARE FOR SCH. 40 PIPE 12" AND ABOVE ARE FOR SCH. STD. PIPE 2 4 3 5 6 10 9 8 7 5 6 7 8 91 0 20 S 2 O 90 80 70 60 50 40 30 ∆ P – IN CH E OF H 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 8: Flow curve Control. Manage. Optimize.
