THE PASTEURIZATION OF MILK 



ter to arrange a feed cup which will make it cer- 

 tain that no more than a definite amount of milk 

 can reach the heater per hour. When a pump is 

 used, a float valve in the tank which feeds the 

 heater can be made to shut off the intake pipe to 

 the feed tank. This increases the milk pressure 

 upon the pump and the discharge pipe, and by 

 means of a suitable valve this increased pressure 

 is made to close the steam valve which supplies the 

 pump. This method of controlling the flow of 

 milk to the heater is in successful operation in 

 several pasteurizing plants. 



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