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August, 1912 THE MARINE REVIEW 259 running without examination. The Union Iron Works' burner has been run for thirty-six hours under the most adverse conditions without the tips be- coming clogged in any way or requir- ing to be cleaned. The oil burning systems of the past have used a great variety of burners, which have necessitated an atomizing agent, such as air or. steam, which, in turn, in the case of air atomization, meant the installation of an air com- pressor, or with steam atomization an evaporator of sufficient size to make up the deficiency in the feed water. This meant quite an expenditure, not alone in first cost, but in maintenance and re- pairs. It was discovered that by heat- ing the oil to a high temperature and forcing it through a suitable burner tfp under pressure, it could be perfectly atomized. The Union Iron Works ex- perimented for some time on such a burner, and has at last produced one which is covered by the Dahl patents. By a mechanical oil burning system is meant a system that requires neither steam nor air for atomizing the oil. The oil, after being heated to the proper temperature, is forced through the burn- er at the required pressure, the pas- sages in the burner being such that the oil is thoroughly broken up before being Union Iron Works' Air CoMBINED DISCHARGE STRAINERS discharged, so that it immediately vol- atilizes, and a perfect flame is obtained could be readily obtained. fine strainer to protect the tip from 4S soon as the oil leaves the burner, The The use of air and steam has been clogging. pressure under which the oil is forced climatolt an AGS Uaibn" Toon Weil through the burner and the size of the mechanical oil burning system, doing The Dahl Mechanical Burner tip regulate to a nicety the exact amount away in the first place with large com- The precautions taken to cleanse the of oil that can be burned. The quantity pressors with their piping, etc, which Ol of any foreign matter insure longer of oil can be varied to some extent by 3; 29) occupy much valuable space in vessels; and in the second place abolishing the use of live steam. On most vessels, this latter is a very serious item. The steam used for atomizing (which usually amounts to from 3 to 5 per cent of all steam generated), and this water being blown up the stack renders it necessary to either carry -a. large amount Of water or to install an evaporator to make up the loss. In a stationary plant where water has to be purchased by meter or where water is very difficult to obtain, it can readily be seen that a practical mechanical oil burning system is of great advantage. The burner is simple and has few parts. It has no moving parts at all to clog and get out of order and is well protected by strainers should any for- eign matter get to the tips. In the suc- tion to the pumps are the duplex strain- ers that take care of the large particles that may be in the oil, thus protecting the pumps. In the discharge from pumps to the heaters are the duplex discharge strainers that protect the heaters and before the oil enters the burners it passes through still another Union IrRoN Works Co.'s COMBINATION SUCTION STRAINERS