One of the safe and pressure diminishing systems in oil and gas refineries, as well as petrochemical complexes, is the help header with the flare stack being the last segment. In this system, all the abundance gases are gathered and sent to flare stack to be burnt. A lot of these gas mixtures have a high warming quality and in some cases, it can even be used as the crude material for different units. It is clear that burning this gas mixture in flare stack causes environmental issues like air and noise pollution. Flare Gas Recovery Systems are specialized compression bundles, which means to recover and repurpose gasses and emissions, like methane/LPG and sulfur dioxide that will usually be burned throughout the flaring method. Key to the protected operation of refineries and petrochemical facilities, the method involves capturing the gas from the flare knock-out vessel and pressures it using liquid ring compressors. The so-recovered gases may be reused inside the facility