United Heat Transfer Pvt. Ltd supplies Marine Heat Exchangers of 40 Feet Length. United Heat Transfer Pvt. Ltd is an ISO 9001:2008 accredited company. Marine Heat Exchangers of 40 Feet Length is the most common way to cool a boat`s/ship engine, using the lake, river or sea water in which the boat floats. A sacrificial zinc anode is screwed into Marine Heat Exchangers of 40 Feet Length to protect it from corrosive salts. This is the most common method, the sea-water being isolated in component [shell/bonnet] which can be designed to withstand its corrosive effect. The closed fresh water circuit of this heat exchanger can be thermostatically controlled so the engine operates at its design temperature.