Quote:
Originally posted by Skulemate
Well, seems reasonable to me that the max pressure drop will occur at the maximum rated flow (I'd assume that the meter is only calibrated to read to a certain value). Given that it's a "variable area" flow meter, I would assume it's some sort of a constriction (i.e. a Venturi Meter) that uses two pressure readings and the energy equation to solve for flow.
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It's clearly a rotameter.
Ben, you do realize this must be mounted perfectly vertical? And you're sure the rotameter is calibrated for water?
Alchemy