MANUFACTURE OF MILK POWDER 



289 



along one side for the automatic removal of the surplus milk not 

 taken up by the drum. To the bottom of this casing is supplied 

 a quantity of milk. This is pumped to the supply pan under the 

 drum, the overflowing milk running back into the lower portion 



Fig*. 98. The Buflovak vacuum drum drier 



Courtesy of Buffalo Foundry & Machine Co. 



of the casing. There is slight pressure in the supply pan which 

 causes the drum to take up a heavy and even coating. Near 

 the supply pan is installed a leveling arrangement which levels 

 off and equalizes the layer of milk on the drum. As the drum 



