From a Gas Purification System, purified gases can be supplied to a number of Gas Chromatographs through Gas Control Boxes when each instrument requires different delivery pressure & flow. The Gas Control Box consists of ON/OFF valve & a pressure regulator to control the gas flow as well as delivery pressure & gauges to indicate inlet gas pressure from the system as well as delivery pressure to the instrument. This helps in using various types of Gas Chromatographs in the same Gas line for different types of application where the operating pressure & flow are totally different. Gas Control Box can be installed on a Wall or Instrument Table & can be supplied as per the specifications of the Customers.