SGE Laboratory Accessories Pvt Ltd manufactures Gas Chromatography Back-Flush System. SGE Laboratory Accessories Pvt Ltd is an ISO 9001: 2008 certified company offering a wide range of GC and HPLC chromatography products based on Liquid Handling, Gas Chromatography, Liquid Chromatography and Mass Spectrometry. The Gas Chromatography Back-Flush System reduces column bleed deposits on detectors and also removes semi-volatile and non-volatile material from the front end of the capillary column.