Butterfly Valves are corrosion resistant thermoplastic body, disc and handle. Compact, light weight design Full boot seal for durable performance. No flange gaskets required. ANSI B16.5 Class 150 & DIN Flange Pattern Impact-resistant ABS Handle with position indicator. Pressure rating for 8" PVC Economy Butterfly Valve 100 psi, 100% Bubble tight seal, and Stainless Steel Stem. Butterfly valves are PVC with EPDM seals.