AptiFlow is an Averaging Pitot Tube and as such generates a differential pressure when placed in a pipe or duct that carries a flowing fluid.
The magnitude of the differential pressure is proportional to half the fluid’s density multiplied by the square of its mean axial velocity.
To transform this into a fundamental flow equation, we can say
Qm ~ csa . (2 . DP . Rho)^.5
The reduced pressure resulting from blockage / dynamic drag of the probe has been
determined experimentally. This can be incorporated into our equation above as a
So now, our fundamental flow equation becomes
Qm = k . csa . (2 . DP . Rho)^.5
Qv = k . csa . (2 . DP / Rho)^.5
C = k . (2 . DP / Rho)^.5
= Mass flow rate [kg/s]
= Volume flow rate [m3/s]
= Mean axial velocity [m/s]
= AptiFlow k-
= Pipe cross sectional area [m2]
= Differential Pressure [Pa]
= Fluid density [kg/m3]
AptiFlow offers several key advantages over other types of differential pressure flowmetering:
Low pressure loss
Fewer straight length requirements
Lower installation cost
More stable performance
AptiFlow is suitable for flow measurement on a variety of fluids over a wide range of pressures and temperatures.
Typical applications include: