Oxeo Extinguishing System’s shuttle non-return valve is 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 shuttle non-return valve is used for the pneumatic directional control of pneumatic systems with two different pressure sources, and is used in stationary argon and/or nitrogen fire extinguishing systems.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.