At 11:38 4/20/2000, Sean Garrett wrote: >I got to thinking about the physics of this last night and I may be wrong. >LP is Liquified Petroleum, right? A liquid does not compress, right? It is a >liquid because it is compressed. Therefore it might not matter about the >size of the holes for bleeding and filling. A liquid will exit as slow/fast >as it enters the tank no matter the size of the holes. The problem with this This would be true if the tank were completely full of liquid -- since it isn't, the incoming flow compresses the headspace until the pressure in the tank equals the pump pressure. After that the flows equalize, unless the restriction causes the fill pump to increase its pressure. I suspect (but don't know) that they use a centrifugal, i.e. non-positive-displacement pump at fairly low pressure; I've seen Acme fill valves rated at GPM with 10 psi differential pressure. david David Beierl - Providence, RI http://pws.prserv.net/synergy/Vanagon/ '84 Westy "Dutiful Passage" '85 GL "Poor Relation" |
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