Sizing and Selection of Butterfly Valves

Selecting and sizing butterfly valves for water applications

A very nice tutorial about sizing butterfly valves, calculating CV etc.

Check: http://www.buildingtechnologies.siemens.com/bt/us/SiteCollectionDocuments/sbt_internet_us/products-systems/hvac/downloads/Master_HVAC_6.0/30Engineering1-32.pdf

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