Sensia NuFlo User Manual
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Sensia NuFlo User Manual

2-inch gas flowmeter
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N U F L O
TM
2-inch Gas Flowmeter
User Manual
Manual No. 9A-100079591, Rev. 01

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  • Page 1 N U F L O 2-inch Gas Flowmeter User Manual Manual No. 9A-100079591, Rev. 01...
  • Page 2 All Rights Reserved. Printed in the United States of America. Manual No. 9A-100079591, Rev. 01 September 2009...

  • Page 3: Table Of Contents

    Table of Contents Section 1—Introduction ................. 5 Operating Principles ......................5 Specifications ........................6 Section 2—Setup and Calibration ............... 11 Installation .......................... 11 Calibration of Electronic Readout Equipment ..............11 Absolute Pressure and Temperature ................. 12 Calculating Gas Volume in Actual Cubic Feet ............12 Calculating Gas Volume in Standard Cubic Feet ............
  • Page 4 September 2009...

  • Page 5: Section 1-Introduction

    Section 1 Introduction The NuFlo 2-in. Gas Flowmeter is a turbine flowmeter, housed inside an insert element that is placed between two raised-face flanges. Continuous stud bolts draw the flanges together against the housing element, and gaskets on the face of the flanges and meter body help ensure a competent seal. Bolts, nuts, and gaskets are available as part of an optional hardware installation kit.

  • Page 6: Specifications

    Specifications Size 2-in. (50.8 mm) End Connections Flowmeter installs between two raised face flanges Working Pressure 0 to 2220 psig (15,306 kPa) Nominal Calibration Factor Low Range 325 p/ACF (16600 p/m3) Standard Range 125 p/ACF (4415 p/m3) High Range 70 p/ACF (2472 p/m3) Output Frequency 5 to 320 Hz over rated range Output Voltage...
  • Page 7 (SCFM) MCFD CU. M/DAY (69444.4) 100000 2832000 (34722.2) 50000 1416000 (13888.9) 20000 566400 (6944.4) 10000 283200 (3472.2) 5000 141600 (1388.9) 2000 56640 1000 28320 (694.4) (347.2) 14160 (138.9) 5664 2832 (69.4) (34.7) 1416 566.4 (13.9) (6.9) 283.2 141.6 (3.5) (1.4) 56.6 28.3 (0.7)
  • Page 8 (SCFM) MCFD CU. M/DAY (69444.4) 100000 2832000 (34722.2) 50000 1416000 (13888.9) 20000 566400 (6944.4) 10000 283200 (3472.2) 5000 141600 2000 56640 (1388.9) 1000 28320 (694.4) 14160 (347.2) (138.9) 5664 2832 (69.4) (34.7) 1416 (13.9) 566.4 (6.9) 283.2 141.6 (3.5) (1.4) 56.6 28.3 (0.7)
  • Page 9 (SCFM) MCFD CU. M/DAY (69444.4) 100000 2832000 (34722.2) 50000 1416000 (13888.9) 20000 566400 (6944.4) 10000 283200 (3472.2) 5000 141600 (1388.9) 2000 56640 1000 28320 (694.4) (347.2) 14160 (138.9) 5664 2832 (69.4) (34.7) 1416 566.4 (13.9) (6.9) 283.2 141.6 (3.5) (1.4) 56.6 28.3 (0.7)
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  • Page 11: Section 2-Setup And Calibration

    Setup and Calibration Installation The NuFlo Gas Flowmeter must be installed properly to prevent gas from swirling or experiencing other er- ratic flow characteristics. Figure 2.1 shows the proper installation of the meter. *10 nominal pipe diameters is the minimum recommended upstream pipe length.

  • Page 12: Absolute Pressure And Temperature

    0 psi (14.73 psia) and 60°F. Numerous laboratory tests have shown that the NuFlo Gas Flowmeter produces the same number of pulses per actual cubic foot of gas regardless of the pressure and temperature of the gas when operated within its rated range. As a result, the calibration factor can be specified in pulses per actual cubic foot.

  • Page 13: Calculating Gas Volume In Standard Cubic Feet

    Calculating Gas Volume in Standard Cubic Feet Generally, gas is measured in standard cubic feet rather than actual cubic feet. Remember, at standard condi- tions (0 psi and 60°F), standard cubic feet and actual cubic feet are equivalent. To convert actual cubic feet to standard cubic feet, use the following formula: Actual Cubic Feet P ×...

  • Page 14: Effects Of Supercompressibility

    where FCF = flowmeter calibration factor (pulses/acf) = standard pressure (14.73 psia) = flowing pressure (psia) = flowing temperature (°R) = standard temperature (519.67°R) Example A 2-in. gas turbine meter has a calibration factor of 124.36 pulses per actual cubic foot, and is installed in a flowline operating at 70 psi at 80°F.

  • Page 15: Effects Of Fluctuating Temperatures

    where FSF = full-scale frequency (Hz) FSFR = full-scale flow rate (scf/unit time) FCF = flowmeter calibration factor (pulses/acf) = standard pressure (14.73 psia) = flowing temperature (°R) TBCF = time-based conversion factor (seconds/unit time) = flowing pressure (psia) = standard temperature (519.67°R) Example Calculate the full-scale frequency for the readout in the previous example if the full-scale flow rate is 1,500 Mscf/D.

  • Page 16: Effects Of Fluctuating Pressures

    At 80°F, each actual cubic foot equaled 5.539 scf. The percentage of change caused by increasing the flow temperature to 88°F is shown below: 5.539 5.458 − % Change × -1.46 % 5.539 The percentage of change caused by decreasing the flow temperature to 72°F is shown below: 5.622 5.539 −...
  • Page 17 When faced with varying flowing pressures, consider the following alternatives: 1. Sense the pressure on the flowline and correct the output from the flowmeter. 2. Control the pressure to hold it constant within the limits of error that can be tolerated. Alternative No.
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  • Page 21: Section 3-Maintenance

    Section 3 Maintenance Because all internal components of the 2-in. gas flowmeter are contained within a cartridge, maintenance of this instrument is minimal. Should a flowmeter fail, the internal cartridge can be easily and quickly replaced in the field. See the following procedure for removing and replacing cartridges. See Tables 3.1 through 3.3 for ordering information.

  • Page 22: Flowmeter Assemblies

    600 and 900 ANSI flanges) 9A-100020977 Retaining ring Accessories The following accessories are available for use with the NuFlo 2-in. Gas Flowmeter. The installation hard- ware kit includes bolts, nuts, and gaskets for installing the meter in a pipeline. Table 3.3—Accessories Part Number...
  • Page 23 WARRANTY - LIMITATION OF LIABILITY: Seller warrants only title to the products, soft- ware, supplies and materials and that, except as to software, the same are free from defects in workmanship and materials for a period of one (1) year from the date of delivery. Seller does not warranty that software is free from error or that software will run in an uninterrupted fashion.

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