C.I. Thornburg offers Mueller Lineseal III butterfly valves in a size range from 4 to 48 inches. The butterfly valve has a seat-in-body design, a tight disc-to-shaft pin connection, a stainless steel disc edge, symmetrical lens shaped disc, non-metallic bearings and V type packaging. Butterfly valves are configured with flanged ends, mechanical joint ends, flanged with mechanical joint ends, flanged with slip ons, and slip on.