Tecfluid FLOMAT Series, Instruction Manual

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4.4 Pumps
Pumps should be mounted upstream from the sensor to avoid the suction of the pump
(vacuum).
4.2 Straight pipe sections
The point where the FLOMAT sensor will be installed must be a straight pipe section,
separated from elements that can disturb the flow profile, such as elbows, diameter
changes, etc. Depending on the element the minimum necessary distances upstream from
the sensor are shown on the next page (BS 1042-2.2:1983 standard).
Downstream, the minimum recommended distance to a disturbing element is 5 x DN.
4.3 Valves
Control valves or shut-off valves should always be installed downstream from the sensor to
assure that the pipe is always full of liquid.