For a boiler combustion air application I have a venturi type of flow measurement device in the ductwork. I want to verify the dp across the device. The ductwork is 18' x 31", the venturi throat is 12 5/8". Can anyone recommend the appropriate formula to calculate dp for air flow at 120 F, 25 in...
What is a good, basic isolation valve for anhydrous ammonia service, not refrigerated storage. We currently have SS gate valves, 2" and 3" 300# class that are not sealing well at all under nitrogen pressure testing. Is a gate valves appropriate for this service?, metal to metal ball valves or...
