KROHNE CORIMASS G-MFM 4085 EN - Manual (Page 6)

6
¾ Avoid mounting the meter with long vertical drops after the meter. This could cause
siphoning and cause measurement errors.
Figure 2. Avoid long vertical drops
¾
Install meter at least 4
×
L downstream of pumps. (where L = length of the meter)
Figure 3
¾ Avoid mounting the meter at the highest point in the pipeline. Air or gas can accumulate
here and cause faulty measurements.
Figure 4
¾
The use of reducers at the flanges is allowed. Extreme pipe size reductions should be
avoided due to possibility of cavitation and gassing. One size up from smallest available
flange size is acceptable.
Figure 5
One size up from standard
> 4
×
L
Siphoning effect