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Averaging Pitot Tube (Annubar)

MODEL: SC / R - 1200

A Fluid flute tube is a multi port velocity averaging device. It accurately measures any fluid flowing in pipe, ducts & stacks. Spink Controls provides a highly efficient Averaging Pitot Tube designed for precise and reliable measurement of fluid flow across various industrial applications. The device works by measuring the differential pressure between the static pressure and the dynamic pressure (the pressure caused by the moving fluid).

When the fluid impacts the sensor, it creates a high-pressure zone, greater than pipe static pressure, in front of the sensor. As the fluid moves past the sensor, it accelerates and a low pressure zone is created to the sides and rear of the sensor. Multiple sensing ports are positioned in the high and low pressure zones and an averaged differential pressure is produced. The dp increases proportionally to the square of the velocity of the fluid.

EQUATION TO CALCULATE DIFFERENTIAL PRESSURE (ΔP)in mm of H² O :

When the fluid impacts the sensor, it creates a high pressure zone, greater than pipe static pressure, in front of the sensor. As the fluid moves past the sensor, it accelerates and a low pressure zone is created to the sides and rear of the senor. Multiple sensing ports are positioned in the high and low pressure zones and an averaged differential pressure is produced. The DP increases proportionally to the square of the velocity of the fluid.

Averaging Pitot Tube (Annubar)
Where
  • K = Flow Coefficient of Averaging Pitot tube
  • D = Pipe ID in mm
  • A = Cross sectional area in m2
  • V = Flow velocity in m/s
  • δ = Flow Density in kg/m3
  • SG1​ = Specific Gravity of Liquid
  • SG2​ = Specific Gravity of Gas
For Gas,
  • text
  • Thermal expansion factor of CS pipe = 1, between 0 to 40°C
  • Gas expansion factor assumed to be 1.0 to calculate ΔP
Technical Specification :
  • Line Size : 50 N B To 750 Nb, Higher Sizes On Request
  • Mounting : S E Nsor Fitting With Flange & Fixed To Mounting Flange On Pipeline
  • Optional Insertion : Isolation Valve/ Retract Mechanism
  • Accuracy : +/- 1% Fsr
  • Repeatability : +/- 0.1% Of Fsr
  • Pressure Rating : T Emperature Rating: 450°C
  • Moc : A Nsi 304, 316, Other On Request.
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