UTILIZING EXHAUST STEAM FOR HEATING ACRES OF RADIATOR SURFACE 



THERE are about 1,600 steam radiators in 

 the Singer Building. They have a super- 

 ficial area of 66,234 square feet, or 1.52 

 acres. On a day with the temperature at zero, 

 this surface will give out 17,883,180 heat units, 

 equivalent to 537 H.P., which means the burn- 

 'ing of one ton of coal per hour, if direct steam 

 be used. 



It is possible, however, to use exhaust steam from 

 the engines and without appreciable "back pressure" 

 to retard their action. This is accomplished by the 

 Cryer Return Line System, which solves the problem 

 of circulating exhaust steam for heating through 

 such a large number of radiators and for such great 

 distances without back pressure on the engines. 



This system is very simple: it consists of a Cryer 

 valve placed on the return end of each radiator, 

 connecting into the return piping, on which a vacuum 

 is maintained by means of vacuum pumps in the 



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engine room. The water of condensation and the 

 air are drawn freely through the Cryer valves to the 

 vacuum pumps, which discharge to an air-separating 

 tank, where the air is liberated and the water placed 

 in condition to be again used in the boilers. 



The Cryer valve holds the steam in the radiators 

 until it is condensed, allowing only the water and air 

 to pass into the return pipe, distinguishing absolutely 

 between the three. It contains no springs, floats, 

 or counterweights, or any parts requiring adjustment 

 or attention. In fact, it has only one moving part, 

 which is a heavy brass casting. 



The use of this system permits a circulation 

 through the radiators of exhaust steam, exhaust 

 supplemented with live steam or live steam alone, 

 without pressure. The radiators heat almost in- 

 stantly when steam is turned on and stay hot as long 

 as steam is supplied. The usual troubles due to 

 leaky and faulty air valves are noticeably absent. 



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