Refkar is one of the leading manufacturers of shell-and-tube heat exchangers in Turkey, including condensers (including versions designed for seawater), evaporators (including submerged types) operating on freon; oil heat exchangers (for hydraulic systems, immersion type), and CO2 heat exchangers; liquid-liquid heat exchangers, as well as those designed for biogas; double-tube heat exchangers, floating head heat exchangers, and other types made to order in any size and capacity.