Recycling of helium gas in brazing furnace comprises suction and filtration of gas, fine filtration by recompression, purification by membrane separation, addition of helium gas to purified gas and re-injection of obtained gas into furnace

摘要

The fine filtered gas is analyzed and compared with threshold value. The gas having lower or equal oxygen content is directed for purification and higher oxygen content is directed towards ambient atmosphere. The oxygen purification is done by adsorption/passing into deoxo system.