JACKET WATER COOLING SYSTEM DRAWING FS 435 DESCRIPTION The jacket water cooling system is of the Closed Circuit Type employing soft water circulated at a high rate through the engine block, then through tubular type heat exchangers, where it is cooled and then returned to the engine. 1. The jacket water cooling system consists of built-in soft and raw water pumps, surge tank, heat exchangers, regulators, thermometers, gauges, valves and piping. Having performed its engine cooling functions, the soft water leaves the engine and ie circulated through the cooling water heat exchanger where its heat is absorbed by the cool raw water. A bypass with an automatic temperature regulator (V-16) is provided with the heat exchanger, so that the temperature of the soft water may be regulated. The raw water pump draws water from the salt water system and discharges it through the lubricating oil cooler and the soft water heat exchanger and discharges to the drain trench. The cooling water return from the engine to cooler goes through a thermostatic regulator valve V-16 and part is diverted as feed water to the heat exchanger silencer system which consists of a Maxim silencer heat exchanger, feed water regulator, gauges, auxiliary electric heater, 3-7