Comeval’s ARI STEVI® Control valves Series 470/417 PRO meet virtually any duty in the process industry and utilities. These are control valves of rugged design made out of cast and stainless steel in EN and ANSI executions, with welded or flanged ends and gland packing (470) or bellow sealed stem packing (471). The valves are topped with single acting pneumatic actuators (DP series) or electric actuators (PREMIO series) as well as other options and control accessories.