DSI® Cast Steel Valves have been satisfying the needs of Petroleum Refineries, Chemical Processing Plants, Power Generating Plants, and other processing facilities throughout the world. DSI Cast Steel Valves are designed, engineered and manufactured in strict conformance to API, ASTM, ASME, ANSI and other recognized standards. DSI® Cast Steel Valves are not only characterized by outstanding performance, reliability and quality, they’re also known for their standard features normally optional in other brands. All flanged DSI® Cast Steel Valves come standard with 125-250 RA flange finishes. DSI® utilizes flexible graphite packing, a variety of gasket materials and exacting assembly and testing procedures to ensure compliance with the World’s emissions control standards.