Mounting; Recommended Steadying Lengths According To Din En Iso 5167-1 - ABB Sensyflow FMT400-VTS Commissioning Instructions

4

Mounting

4.1

Recommended steadying lengths according to DIN EN ISO 5167-1

Change from one to two columns
To achieve the stated measuring accuracy, the steadying lengths
seen above must be provided. For combinations of inlet run dist-
urbances, e. g. valve and reducer, you must always consider the
longer inlet run length. In confined spaces at the mounting location the
outlet run length can be shortened to 3 x D. The reduction of the
minimum inlet run length, however, will impact on the achievable
accuracy.
Change from one to two columns
CI/FMT400-VTS/VTCS-EN
×
X D
< 7°
< 7°
G00807
G00808
G00809
G00810
G00811
Sensyflow FMT400-VTS, FMT400-VTCS
×
5 D
G00805
G00806
High repeatability of the measuring value is still provided. Under
certain circumstances, special calibration can be performed for insuf-
ficient steadying lengths. For this purpose and in individual cases
consulting is necessary.
For gases with extremely low density (hydrogen, helium) the stead-
ying lengths must be doubled.
Mounting
Expansion
X = 15
Reducer
X = 15
90° elbow
X = 20
Two 90° elbow
in one level
X = 25
Two 90°elbow
in two levels
X = 40
Valve / slide
X = 50
EN - 11