34 



BULLETIN HI, U. S. DEPARTMENT OF AGRICULTURE. 



r*/KNHOt.£ 





to the utilization of all the heat in the exhaust steam, *or as much 

 as can be used profitably in the factory. 



The importance of effectively insulating hot-water tanks and pip- 

 ing is not appreciated by most dairymen. A good quality of heat 

 insulation properly installed will pay for itself in fuel saved in from 

 six months to a year. Xot only will the insulation prove to be a good 

 investment from the standpoint of fuel saved, but it will maintain 



the water at higher 

 temperature, thus 

 preventing the possi- 

 bility of the water 

 freezing over night 

 and bursting the 

 tank. 



The water-heating 

 and storage tank 

 should be placed in 

 the boiler or engine 

 room, where the tem- 

 perature of the sur- 

 rounding air will as- 

 sist in maintaining a 

 high temperature in- 

 side the tank. The 

 tank should be used 

 for a general supply 

 of hot water for all 

 purposes around the 

 creamery, such as 

 boiler feed, wash wa- 

 ter, pasteurizing, etc. 

 When practicable it 

 S:-iy<^M is advisable to place 



&>".':a'-t).';,y} r 



'""" " the tank high enough 



Fia. 8. — Vertical exhaust-steam water heater and .storage £o allow the hot 



water to flow by 

 gravity for washing floors, utensils, etc., but for pasteurizing it is 

 necessary to install a circulating pump in the pipe line, preferably 

 in the return line between the pasteurizer and the tank, so that a 

 forced circulation of hot water will be maintained. It is also neces- 

 sary to provide a boiler-feed pump, designed for handling hot water, 

 as an injector will not handle satisfactorily water of high tempera- 

 ture. 





