Abstract

A spring return check valve that has a body forming a fluid flow path therethrough, a cover that closes an opening in the body and including a cavity therein facing the fluid flow path, a disc that rotates from a first position closing the fluid flow path and a second position fully opening the fluid flow path and a spring connected between the cover and the disc and including extensions integrally extending from each end of the spring to cause the spring to buckle into the cavity when the disc rotates to the second position.