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_ Equipment Used Afloat. Ashore Feed Water Regalator—New Oil Burner N RECONDITIONING a vessel of such importance as the LrviaTHAN, every fitting and accessory selected must tend toward greater efficiency and safety. Further, it is essential that such ac- cessories should be of ‘the most mod- ern type. For these reasons, a_ short description of the Aster-Anthony type of feed water regulator as fitted to the watertube boilers of the LrviATHAN will be of interest. This regulator which is manufactured by the Aster Engineering Co. Wembley, England, operates hydraulically, which method has been endorsed by many naval authorities and marine engineers as advantageous for the arduous duties of marine service. The designers of these regulators guarantee to control the level in a boiler within a maximum _ varia- tion of half an inch. Several cases have arisen where the regulators have been installed aboard ships carrying the boilers placed athwart- ships and it will be realized that it would be practically impossible to steam these ships without an efficient and re- liable regulator. The difficulty is of course emphasized when one realizes that the ships in question High -5 -A are probably one-eighth the size of the LrEvIATHAN and subject to a great deal more movement than she will ever experience. The manufacturers have been able to give the necessary guarantees in regard to performance to enable these regulators to be included in the new Scott Still engines which are beinz built for Messrs. Holts. In this regulator, no additional valve for regulating 'the feed water admission need be used, as the special. valve pro- -vided with the apparatus is in itself a check valve, automatic in action, and can, when desired, be fitted with an is- olating valve, thus forming a complete feed check unit. This valve A, as illus- trated, is flited with a balance piston D, and the feed delivery pressure acts equally upward on the valve and down- ward on the balance piston. In addi- tion, the full boiler pressure is acting downward on the top of the valve, which is, therefore, tightly closed. But a small quantity of water is continually passing by way of ‘the small hole B in the special plug C to the space E underneath the balance piston, and as long as this is allowed to escape the check -valve remains closed. If, how- Normal Atte ae Outlet Pipe H (as Fanaa: Housing J Control Valve K aa Lever Cam Handle Control Box Steam Level ing Pipe Valves on Cocks Water Leveling Pipe T N 0 Float P R § TTD = f Normal Low _about ever, it is prevented from escaping as, for instance, by closing the cock F, the water instantly fills the space E and exerts the same pressure underneath ‘the piston D as above it. Piston D, there- fore, becomes balanced and inoperative and the feed delivery pressure raises the check valve and the feed water enters the boiler in the usual manner. As soon as the water is allowed to escape from space E, the check valve again closes, slowing down the feed pump which con- tinues ‘to crawl, by-passing the small quantity of water passing through the hole B in plug C until the flow of the water is again interruptea. The control of the escape of this small quantity of water, therefore, con- stitutes a complete hydraulic control of the check valve. The above description explains the fundamental difference claimed for the hydraulic system since it is not neces- sary to control the whole volume of water entering ‘the boiler, but only the small quantity passing through hole B, 1. per cent of the total feed. The water escaping from the space E is led by means of the pipe G to the control box O situated at the working A Valve B Hole C Special Plug D Balance Piston E Space F Cock G Operating Water Pi pe METHOD OF OPERATION OF FEED WATER REGULATOR AS INSTALLED ON THE LEVIATHAN 400