Basically we have a valve that was tested with air and gave us a leak rate (MFR) of 0.046lbs/min of air. We need to know how much that equates to in Jet A Jet Fuel. The stats are: temperature ranging from 120 F to 200 F. Fuel temperature will range from -40F to 150F. Air pressure in the line will range from ~ 20-40 psig. Fuel pressure could be as high as 10 psig. Density of Jet A jet Fuel is about 6.7 lbs / Gallon US. Does anyone know how to figure out this conversion. Ask me any more info required and i'll see about getting it. Most of the people working on this are mechanical engineers and are not really good with this type of problem.