Siemens SITRANS F Series Operating Instructions Manual page 17

Inlet / outlet conditions
Figure 4-1
● Ensure that inlet and outlet are straight
● Ensure sufficient distance between meter and bends, pump and valves (see the table
below).
● Install valves influencing the flow profile after the flowmeter. The only exception is
installation of the sensor in a vertical pipe (upwards flow direction). In installations in a
vertical pipe a valve below the sensor is required to allow zero-point adjustment
Note
Select a valve not altering flow when fully opened.
Table 4-1
Recommended inlet
Fully open valve, ie no flow restriction
Partially open valve
Pumps
Single bends
Recommended outlet
Note
By more than one bend, the optimal inlet is min. 40 × pipe diameter.
SITRANS F US SONO 3300
Operating Instructions, 01/2010, SFIDK.PS.029.J4.02
Inlet and outlet conditions
Recommended inlet conditions
4.2 Determining a location
Min. 10 × pipe diameter
Min. 40 × pipe diameter
Min. 20 × pipe diameter
Min. 10 × pipe diameter
3 × pipe diameter
Installing/Mounting
17