Considerations for flowmeter installation
How often have you purchased a flow meter that seems perfect for your application only to be disillusioned by unclear or over complex flowmeter installation procedures. In this issue of fLowdown – Titan Enterprises offers an informed insight on why you must carefully follow manufacturers installation pipework recommendations.
As a general rule if your flowmeter is a velocity measuring device it will require straight lengths of pipe both upstream and downstream. There are however a few exceptions:- Positive displacement flow meters, low flow Pelton wheel turbines, the Atrato ultrasonic flow meter from Titan and some Coriolis flow meters. All of these flowmeter designs are more tolerant of upstream flow disturbances. In addition traditional turbines, pitot tubes, orifice plates, electromagnetic flow meters and vortex shedding meters are all likely to give erroneous readings if the manufacturers installation pipe work recommendations are not strictly adhered to.
Disturbances can be caused by pipework changes as mundane as adding in an elbow joint or an angled shut-off valve. A pair of slow bends at ninety degrees to each other can introduce enough turbulence to slow down and possibly even reverse an axial turbine meter. So take care in carefully following the pipework instructions you are given to ensure optimal results.
Titan Enterprises Flommeter Installations notes (none Atrato)
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