Modular design gas feed system with self contained automatic switchover capability. NXT3000 available for capacities up to 3000 PPD (60 kg/h). For applications requiring uninterrupted gas feed a builtin automatic changeover function is provided in every vacuum regulator. All that is required is two vacuum regulators. No separate changeover module or valve is required, but for complex vacuum changeover systems the Series NXT3000 vacuum regulators can be used with the Capital Controls® series of automatic vacuum switchover modules. Meter assembly is an optional item.