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FEM630 | ELECTROMAGNETIC FLOWMETER  |  OI/FEM630-EN REV. A
...Installation conditions
Installation in piping with larger nominal diameter
Determine the resulting pressure loss when using reducers:
1  Determine diameter ratios d/D.
2  Determine the flow velocity based on the flow rate 
nomogram (Figure 17).
3  Read the pressure loss on the Y-axis in Figure 17.
Reducer1
Figure 16  Using reducers
Figure 17  Flow rate nomogram for flange 
5     ...Installation