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GROOVED END <br /> Flow Characteristics <br /> 1.2 <br /> Y i 21/2' 6n 8- <br /> 1.0 <br /> 0.8 <br /> L,a <br /> W N � <br /> a 0.6 - —� <br /> W <br /> zz 04 <br /> 0.2 ` OF <br /> 0.0 <br /> 100 1,000 10,000 <br /> FLOW RATE IN GALLONS PER MINUTE(GPM) <br /> WAFER AND GROOVED END <br /> Friction Loss <br /> Friction Loss in Friction Loss in <br /> Valve Size in. Equiv. Feet of Valve Size in. Equiv. Feet of <br /> Valve Model (mm) Pipe Valve Model (mm) Pipe <br /> DW(Wafer) 2'/Z(65) 4.8 DG(Grooved) 2%2(65) 6.9 <br /> 3(76.2) 3.5 3(76.2) 4.1 <br /> 4(100) 2.4 4(100) 3 <br /> 6(150) 5.1 6(150) 5.5 <br /> 8(200) 5.4 8(200) 5.4 <br /> GROOVED END <br /> Flow coefficient : Cv <br /> DN (mm) SIZE(in) Disk Open Angle <br /> 300 400 500 600 700 800 900 <br /> 65 2'/z" 12 27.4 53.1 96 138 156 163 <br /> 80 3" 18.9 39.4 78.9 144 210 243 249 <br /> 100 4" 30 65.1 129 226 377 488 514 <br /> 150 6" 84 184 369 634 964 1196 1286 <br /> 200 8" 165 339 677 1230 2002 2850 3129 <br /> WAFER TYPE <br /> Flow coefficient : Cv at full open <br /> DN (mm) 65 80 100 150 200 <br /> Size (in.) 2'/z' 3" 4" 6" 8" <br /> Cv 222 389 1000 1998 4619 <br /> Cv= flow(9pm) = Q <br /> pressure loss(psi) %r4 P <br /> AUGUST2006 Page6 BULLETIN BUITERFLYREV#2 <br />