The Generator Gas Manifold (GGM) System is a compact monitoring and control system designed to manage hydrogen and carbon dioxide supply gases at the exact point they enter a hydrogen-cooled generator. Receiving gas from the plant’s bulk supply or bottle manifold, the GGM monitors critical gas supply pressures and safely regulates the hydrogen supply to the appropriate machine pressure. It features manual isolation valves arranged for easy operator access, allowing plant personnel to control all facets of the purge process from a single location. Additionally, an integrated safety spool is built directly into the GGM to ensure that dangerous mixtures of hydrogen and air are strictly avoided.