IM-P736-02 EMM Issue 3
21
VLM30 In-Line Vortex Flowmeter
3.2 Inlet and Outlet Recommendations
In order to maximise operational reliability, the flow profile at the inflow end must not be distorted if at all
possible. The figures below show the recommeded inlet and outlet Sections for various installations.
Fig. 5 Straight pipe Sections
Installation Inlet Section Outlet Section
Straight Pipe Section minimum 15 x DN minimum 5 x DN
Valve upstream of the meter tube minimum 50 x DN minimum 5 x DN
Pipe reduction minimum 15 x DN minimum 5 x DN
Pipe extension minimum 18 x DN minimum 5 x DN
Straight Pipe Section Valve upstream of the meter tube
Pipe reduction Pipe extension
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