Butterfly valve assembly

The Cv value indicates the butterfly valves ability to media

The butterfly valve is fully opened and the pressure difference between the two ends of the butterfly valve △p.=1lbf/in^2  The medium is 15.56°C and the flow through the butterfly valve is called CV.

The CV value of the butterfly valve depends on pressure, density, medium, temperature

SizeValve opening CV
10°20°30°40°50°60°70°80°90°
DN401-1/2′0.72.46.914.222365981113
DN502′1.13.810.2223860100132193
DN652-1/2′27.518.2356195187240315
DN803′2.59.8264883126214338425
DN1004′3.814.63972119221361606723
DN1255′6.5246211821739459910381243
DN1506′10429517532654287312601859
DN2008′19641653065739951556723103124
DN25010′281012454518361462225332564757
DN30012′3412931261511372125324849917058
DN35014′4716339079514982573398057498319
DN40016′622315081077197133815385809911468
DN45018′752566211208231539256331947413612
DN50020′10334685916923086534885131310918748
DN60024′1394941153238944667561119451808825217