Isolation flange from Bell & Gossett combines a full-port isolation ball valve and a circulator flange to allow circulators to be isolated from the rest of the system. The free-floating flange rotates, eliminating the need to align the bolt holes when installing it to the system piping. Offered in 0.75, 1 and 1.25" NPT and sweat, the flange is designed to be used with all brands of circulators.