Is it okay to throttle before flow meter when doing fire pump performance test?
-thanks for any feedback
¿You mean throttling the control valve before the flow meter instead of the one after? You'll get a slightly more accurate reading by throttling the valve after the flow meter as there wont be the turbulence created by a partially open vale affecting it.
I would add to Emmanuel's comment that the throttling before the flow meter will usually result in so much turbulence that the flow meter may be difficult to read. I.e. the readings can bounce all over due to the turbulence. Better to throttle after the meter to minimize turbulent flow through the meter.
Don't forget, that you should calibrate the flowmeter, acording to the manufactuer's specs, before opening your throttle valve.
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