The new 565 Butterfly Valve is designed to optimize piping systems built for water applications and a host of other applications. This new product comes at a significantly lower initial cost and will ...

This article was originally published with the title “Lock-Up Safety-Valve” in SA Supplements Vol. 5 No. 129supp (June 1878), p. 2050 doi:10.1038/scientificamerican06221878-2050csupp ...