For years, Forum’s 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 valves are offered in a wide variety of multi-turn valve configurations in stainless and carbon steel, as well as almost every special alloy required for difficult fluid compositions and high-pressure, high-temperature applications. We provide cast and forged gate, globe and check valves that are designed, engineered and manufactured in strict accordance with national piping standards.