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APCO AIR VALVE GUIDE - DeZURIK
www.dezurik.comTheory and Use of Air Valves ... Selecting Orifice Sizes for Air Release Valves For many decades sizing orifices for Air Release Valves has been a mystery. Air entrapped in pipelines is an invisible culprit and no ... Based on the preceding and more than 75 years application experience, APCO developed and recommends the following criteria