The V137 is a pneumatically actuated seat valve from IMF International, the French manufacturer of gas pressure regulation and control equipment founded in 1964. IMF serves demanding sectors including defense, nuclear energy, hydrogen, petrochemical, and steel with custom-engineered valve solutions. Detailed specifications for the V137 are not publicly indexed — contact IMF or an authorized distributor such as GRC (Poland) for technical data, flow curves, and material options.