Oxeo Extinguishing System selector valves are used in environmentally responsible Oxeo inert gas suppression systems, an FM Approved and cULus Listed solution utilizing either argon or nitrogen to protect Class A, B and C fires (with argon being suitable to protect Class D fires). The selector valve serves to selectively flood extinguishing zones in the case of fire.Utilize innovative design tools “Oxeo System Estimator” or “vInert” to specify your entire system! The many components to a full Oxeo Extinguishing System are available at Viking. Ask your local rep about the possibility of putting together a kitted solution.