CNG Products from OPW CleanEnergy Fueling Products are the result of a dedication to continuous innovation in the design, engineering and manufacturing of high-quality components for clean-energy fueling applications. CleanEnergy CNG Products include nozzles for use in self-service, fast-fill and high-flow CNG applications, along with receptacles, hose assemblies, in-line breakaways, fittings, valves and filters.