ITABAR Flow Sensor Type
FTMD
Operating manual
5.5
Required Undisturbed Pipe Run Lengths
(in multiples of D)
The accuracy of the measurements of the ITABAR
Sensor depends on the development of a stream
profile which should be as undisturbed as possible.
Therefore the selection of the installation location
within the pipe run is of considerable importance.
The following tried and true hints regarding the
required pipe lengths ahead of and behind the
sensor are designed to help you in your selection of
the most advantageous installation location.
As a general rule, regulating valves, throttle valves
and gate-type valves should be installed behind the
sensor.
Note:
If the recommended straight pipe run lengths are
not available, the measuring accuracy can be
adjusted to the specific conditions of the measuring
stretch by conducting a comparison measurement
(e.g. Pitot tube, point measurement).
The point measurement guarantees that the
differential pressure corresponds to the true flow
velocity, thereby assuring the specified accuracy.
Details can be requested from the manufacturer.
D = Pipe Diameter
A = U p s t r e a m B = D o w n s t r e a m
7
3
9
3
17
4
18
4
R e s t r i c t i o n i n t h e P i p e R u n
7
3
W i d e n i n g o f t h e P i p e R u n
7
3
R e g u l a t i o n D e v i c e
24
4
5
