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Flow rate and valve sizing - ASCO | Home - Fluid ...
Rate and valve sizingIn order to design valves for a process system correctly, the valve size is determined by the required flow Kv-value serves as a calculation basis for the different process value is stated in the following table with regard to nominal diameter and :For the correct Kv to Cv conversion calculation, use onlythe stated units formulas Kv-value must be converted from (cubic meter / hour)by utilising the following conversion the US the flow rate of water is measured with theCv-value in US-gallons per minute (gpm) with a pressuredrop of p 1 of Kv in CvCv = 1,17 x KvConversion of Cv in KvKv = 0,86 x CvExplanations:Kv m3/h flow rate parameterQ m3/h volume flow rate kg/m3 specific gravityp1 bar pressure before the valvep2 bar pressure after the valve p bar pressure drop through the valve p = p1 - p2 Aseptic valve KvValve typeDNNPSMA sizeNominal diameterISO 1127 DIN 11850 ASME-BPE190/207/290/2974-8---6-8---81/48 2,4-0,7103/88-2,31,4151/28--2,0188/195/3 07/289/295/39781/4102,7--103/8103,92,51, 4151/2105,34,72,2203/410-5,54,6385/402/4 07/ 495/985/995/997151/22510,59,5-203/42513, 011,56,82512515,514,212,0321 1/44043,0--401 1/24050,043,040,05025064,052,048,0652 1/28095,089,085,0 Test stand to determine and document flowrates and Kv (Cv) valuesKv-valueThe Kv-value is a parameter defining the flow rat
www.asconumatics.eu 99 Flow rate and valve sizing In order to design valves for a process system correctly, the valve size is determined by the required flow rate.
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