LP regulator at altitude
Does a LP regulator maintain a constant 11"+/- WC pressure as altitude increases? It would seem that as atmospheric pressure decreases that less force would be exerted on the diaphragm thereby changi...
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Perhaps a review of the concept of absolute versus relative pressure is in order. I would expect your LP regulator to maintain a (nearly) constant relative pressure measured in psig (pounds per square inch-gage).
