POWER EQUIPMENT. 17 



POWER EQUIPMENT. 



The boiler-room equipment consists of two 75-horsepower Bab- 

 cock & Wilcox steel sectional boilers set in one battery and designed 

 for a working pressure of 150 pounds per square inch. Steam is 

 led from the boilers through 4-inch copper-expansion bends to an 

 8-inch extra-heavy steel-pipe header, from which a 7-inch steam 

 main drops to the pipe subway. The engine supplies are 3-inch 

 copper pipes tapped into the 7-inch main and carried into the engine 

 room below the floor line, from where they are carried up to the 

 cylinders by expansion bends of 4-foot 4-inch radius. The exhaust 

 main is 8-inch standard pipe, and passes through a 200-horsepower 

 Wainwright even-flow feed-water heater, which is placed in the 

 subway, and from the latter it passes through the boiler room to 

 the atmosphere, being fitted with a 24 by 30 inch bent exhaust head. 

 The main steam and exhaust lines are drained by two Bundy return- 

 steam traps discharging into a feed-suction tank located in the 

 subway. 



The flue gases from the boiler are led through a sheet-steel smoke 

 header to the main smokestack, which is of 48-inch internal diameter 

 and 103 feet high. A damper is fitted into the smoke header which 

 is automatically controlled by a Locke hydraulic damper regulator. 

 A 24 by 60 inch vertical auxiliary boiler, with a Deane 3^ by 4 inch 

 duplex steam pump, is installed for general water service during 

 periods when the main boilers are shut down. The feed water for 

 the main boilers passes through a Loomis-M arming Type H pres- 

 sure filter, . r .,,jirh discharges into a filter tank having a capacity 

 of 500 gallons, from which it is carried to two llj-inch Metro- 

 politan double-tube injectors fitted to the main boilers, the auxiliary 

 boiler and pump, and to the main feed pump, which is of the Deane 

 triplex single-acting type, with cylinders 4 by 4 inches geared to 

 a Stow multispeed motor. The pump and motor are located in the 

 pipe subway, and receive water from the steam traps and cylinder 

 jackets of the air compressor, vacuum pump, and ice machine, as 

 well as from the filter tanks. 



The fire pump is of the Deane duplex inside-plunger pattern, 



7-J by 4J by 10 inches, with 4-inch suction and 3-inch discharge to 



the fire-main system in the main building. A connection is also 



made from this pump to the house-service tanks, two in number, 



27197 2 



