General Purpose Commercial Butterfly Valves Lug Body Style for dead end service can be bolted to ANSI Class 125 or Class 250 Flanges. Valve Bodies are Cast Grey Iron ASTM 126 Grade B. Valve stems are 304 Stainless Steel . The disc material is 316 Stainless Steel. The seat material is EPDM. The stem seals are rubber O-rings made of EPDM. Valves 2” - 8” are lever operated, and valves 10” and larger are gear operated, unless automatic operation is specified. Valve are suitable for air service for temperature up to 250°F. Lug Body Butterfly Series 2500 are manufactured by J&S Valve - Huffman, Texas.