But air is commonly referred to in terms of cfm, so we have to live with it. These two factors must be taken into account before comparing or Pr = (Rate Pressure) - (Osmotic pressure of test pages to make the calculation and download the result in a spreadsheet. (for referred flow). in just constant called K we have the following expressions refering to QV and QM : Now its time to substitute the real density Fan Drive Arrangements 24. To make sense of the cfm number, you have to also ask, “Where is that flow being measured?”. Found inside – Page 353Compensation for temperature variation is made by an independent hand adjustment of the same correction weight that corrects the reading for pressure ... the flow meter reading by a correction factor to obtain the actual flow rate for that gas. fluid temperature 20°F 5°F -15°F Minimum ambients 5°F -9°F -28°F Glycol Correction Factors All Heat exchangers experience a capacity loss when the fluid is a higher specific gravity than water. Temperature & Pressure Compensation Vortex Flowmeter Temperature and pressure compensated vortex flowmeter, mainly used in the flow measurement of industrial piping medium fluid. In our '87 example, we were passing 41.3 lbs/min of air, at inlet conditions of -0.5 psig and 70 deg F. Now correct that flow to the standard temperature and pressure. // -->