WASHING THE BUTTER 319 



by the addition to it of ice. In the absence of a stationary plat- 

 form the vat may be placed on a truck which can be moved up 

 to the churn when the wash water is needed. In creameries 

 operating an artificial refrigerating machine, a large stationary 

 vat may be installed at some elevation or on the second floor. 

 This vat should be properly insulated on the sides, bottom and 

 top and equipped with a brine coil or ammonia coil whereby the 

 water may be cooled to any temperature. The water is piped 

 from this vat to the churn where it is connected with the steam 

 line. This arrangement furnishes a practical and reasonably 

 efficient means to regulate the temperature of the wash water 

 as desired for the one-churn creamery. 



For larger creameries which operate numerous churns, 

 greater uniformity of temperature is assured and less time is 

 consumed for temperature control, where the wash water equip- 

 ment is so arranged as to have the cold water from the brine- 

 cooled sweet water tank on the second floor, discharge into a 

 tempering tank elevated in the creamery and equipped with 

 large thermometer gauge and steam supply. Then have from 

 the bottom of this tempering tank a two-inch water line extend 

 over the entire row of churns with a lateral and valve over 

 each churn. 



In this manner the wash water for numerous churnings 

 can be tempered to the desired temperature simultaneously and 

 when the churnman is ready for the wash water, all he has to 

 do is to open the valve over any one of the churns where it 

 is needed. 



The same equipment can also serve for the hotwater supply 

 for rinsing and washing the churns after use. 



In other factories, portable tempering tanks are used. In 

 this case, the tap water, cold water and steam line outlets are 

 generally located at some distance from the churns, in a con- 

 venient and readily accessible place and at a sufficient height 

 so that a portable wash water tank on a truck can be backed 

 under these outlets and filled. The use of a suitably constructed 

 tank on wheels, holding about 100 to 150 gallons and standing 

 high enough so that the gate of the tank clears the bottom of 

 the door frame of the churn, when the churn is in position to 



