BLG, LQG series lubricating oil and fresh water cooler is used to cool lubricating oil and fresh water of diesel engine. This cooler is shell expansion type of horizonal shell and straight tubes. The ends of cooling tubes are connected separately to left and right tube plate by means of expansion. There are one lubricating oil or fresh water inlet and outlet in left and right of shell. There are also two lift ring and tow drain plugs in the shell. The cooling water flowing in tubes conducts heat exchange with lubrication oil or fresh water while they flow across the tubes along the route rormed by curved membranes.
