Portable Air Driven Gas Booster rated to 5000-psi (345 bar) for oxygen/helium and 10,000-psi (690 bar) for Breathing Air or Nitrogen. Used for filling or topping off Rebreather bottles and larger oxygen cylinders from as low as 200-psi (14 bar). Offered in 2-stage, single acting and double acting configurations. Typical units include low and high pilot valves to automatically stop the booster, pressure relief valve, inlet & outlet filters (5-Micron), shop air controls (includes filter regulator, gauge and on/off ball valve), optional high pressure air controls (includes high pressure regulator, relief valve and outlet regulated gauge), and gas inlet & outlet gauges (dual scale). All items are line mounted on to the booster.