Nesplon 7 valves are designed to keep the end utilities of industrial gas lines safe; they’re fitted with flame arrestors and gas check valves. These valves can be installed directly on the outlet of the pressure reducer; they’re suitable for both comburent gas (oxygen) and fuel gas.Nesplon 7 valves have a G3/8″ F threaded fitting on the inlet and a G3/8″ M fitting on the outlet, with a right-hand thread for oxygen and a left-hand thread for fuel gas.We recommend replacing the Nesplon 7 valves in the case of a flashback, after 5 years from the date of installation and in any case after the time limit of 5 years plus 1 from the manufacturing date on the valve.