DiaDiaphragm Valvesphragm Valves for Asepticfor Aseptic
Conversion: For the correct Kv to Cv conversion calculation, use only the stated units formulas above The Kv value must be converted from (cubic meter / hour) by utilizing the following conversion factors In the US the flow rate of water is measured with the Cv - value in US-gallons per minute (gpm) with a pressure drop of p 1 PSI
ABOUT Cv (FLOW COEFFICIENTS) - FNW Valve
Q = Cv x ΔP x 62 4 D The formula above utilizes a conversion factor of 62 4 which is the density of water in lbs/ft³ The following formula is often used using a fluid’s specific gravity (G) where the relationship to water density is already considered Q = Cv x ΔP G Likewise, Cv for particular flow characteristics can be determined from
Liquid Friction Factor K And Flow Coefficients Av Cv And Kv
cvmetx 1 6657856 10 −6 = × Cv-Metric to Av Conversion Factor kvx m 3 hr W16C bar 0 5 ⋅ 1 m 2:= ⋅ kvx 2 77630933 10 −5 = × Kv to Av Conversion Factor kvz 1 kvx 1 m 2:= ⋅ kvz 3 60190411 10
Table 9 : Unit conversion
Flow (CV = 1 16 Kv) et (Kv = 0 86 Cv) 1 m3/h = 1000 l/h = 0 278 l/s = 4 4 GPM = 0 588 CFM 1 GPM (US) = 227 l/h = 0 063 l/s = 0 134 CFM 1 CFM = 1700 l/h = 0 472 l/s = 7 48 GPM 1 l/s = 3600 l/h = 15 86 GPM = 2 117 CFM Power 1 Watt (W) = 3 4 BTUH = 1 J/s 1 kW = 3412 1 BTUH = 1 341 HP = 1000 W = 860 kcal/h 1 BTUH = 0 29307 W
Tech Info - Cole-Parmer
Cv to scfm Conversion 3094V 1 Q: What does “Cv” mean? A: Cv is defined as the coefficient of velocity The Cv value is generally used to compare flows of valves The higher the Cv, the greater the flow Cv to scfm Conversion Factor Table psi of Air Pressure 40 50 60 70 80 90 100 Factor 0 0370 0 0312 0 0270 0 0238 0 0212 0 0192 0 0177
Direct Operated 2-Port Solenoid Valve
C [dm3/(s·bar)] b Cv Kv Conversion Cv 10 1/8 1 6 0 36 0 58 0 08 0 07 0 08 0 9 JSX11-Sm101 160 2 4 0 62 0 45 0 15 0 13 0 15 0 4 JSX11-Sm201 160 20 1/8 3 2 1 35 0 48 0 35 0 30 0 35 0 7 JSX21-Sm301 320 1/4 3 2 1 35 0 48 0 35 0 30 0 35 0 7 JSX21-Sm302 320 4 0 2 02 0 48 0 52 0 45 0 52 0 3 JSX21-Sm402 320 5 6 2 62 0 43 0 73 0 63 0 73 0 2 JSX21-Sm502 320
Flow Coefficients and Computations
Solution: From Cv Table, the corresponding valve position is 70 open Problem: Find valve size and valve position of an unlined valve, with flow at 200 gpm and an actual pressure drop of 5 psi for a liquid with a specific gravity of 1 8 Solution: Cv =200 √1 8/5 = 200 √ 36 = (200)(0 6) = 120 From Cv Table: A 2" valve has a Cv of 120 at 40
Valve Sizing Calculations (Traditional Method)
627 Technical Valve Sizing Calculations (Traditional Method) 3000 3,000 4,000 6,000 8,000 10,000 20,000 30,000 40,000 60,000 80,000 100,000 200,000 300,000 400,000
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