Flomec 490, Instruction Manual

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Installation 4
2.1 Meter location
Choose an appropriate section of horizontal or vertical pipe as per the guidelines below. With
vertical pipe installations the media should be pumped up through the pipe past the flow
sensor so that any entrained air will pass freely.
The Insertion Meter requires a fully developed turbulent flow profile to ensure maximum
measurement accuracy and repeatability. This can be achieved by installing the Insertion
Meter in a straight run of pipe. We recommend at least 10 but ideally 25 straight pipe
diameters upstream & at least 5 but ideally 10 pipe diameters downstream of the Insertion
Meter. Major obstructions such as pumps, valves or strainers will require longer straight runs
before and after the Insertion Meter.
2.2 Meter installation & orientation
Cut a 40mm diameter hole (1.6") on either the 2, 10 or 12 o’clock positions of the pipe. If
there is any likelihood of air entrainment in a horizontal pipe do not locate the flow transducer
in the 12 o’clock position.
Install a female threaded weld on fitting (threadolet) or service saddle.
Wrap the threads of the Insertion Meter with Teflon tape or sealing compound & screw the
unit into the installed fitting.
10 pipe dia. minimum
25 pipe dia. prefered
5 pipe dia. min.
10 pipe dia. prefered
FLOW
Major obstructions such as
pumps,valves,reducers or strainers
to be kept well outside the straight
run pipe sections
12 o
’clock 2 o’clock
Other positions
around the pipe are
acceptable
10 o’clock