Type 21 ball valves in sizes of 0.5 to 6" offer a true-union design that eliminates the need for flanges and permits installation or repair without expanding the pipeline. Constructed from PVC, CPVC, PP and PVDF, they offer pressure ratings of 230 psi for sizes 0.5 to 3" and 150 psi for 4 and 6" at 70oF (21oC). The product has an ISO mounting pad integrally molded to valve body for both actuated and manual operations, a double O-ring seal on the stem, and a blowout-proof design.