NI 
on 
SWEETENED CONDENSED M1itK—ConDENSING 
pan atomizing into a dense spray, which is partly drawn over 
into the condenser, causing loss of milk. 
The body of the pan also usually carries, near its lower 
portion, a sampling cup, or striking cup, which facilitates the 
sampling and testing for density, of the contents of the pan 
while the pan is in operation. 
A suitable, permanent covering should be provided for the 
body of the pan for insulation against heat radiation. “This will 
not only economize fuel and speed evaporation, but it will also 
assist in keeping the pan room 
reasonably cool, 
The Dome rests on top of 
the body of the pan. It 1s equip- 
10 oe" a \ ped with a manhole} manhole 
- cover, thermometer, vacuum 
gauge, sight glasses, lights, 
blow-down valve. or 
ee 
vacuum breaker. ‘The 
manhole measures 
about fourteen to 
eighteen inches in di- 
Fig. 21. Vacuum gauge : 
& Co. ameter. It is closed 
Courtesy of Arthur Harris 
by a solid brass cover 
with a well-fitting, ground surface flange. ‘The cover 
carries a five-inch spy-glass or sight-glass through 
which the operator watches the boiling milk in the 
pan. The stem of the thermometer is enclosed in a 
brass casing and reaches to near the bottom of the 4} 
pan. Some processors prefer a short thermometer a 
which registers the temperature of the vapors instead 
of that of the milk. As both, the milk and the vapors |: 
are subjected to the same pressure, their respective 
temperatures are the same. The vacuum gauge con- 
fl 
nects with the interior of the pan, and indicates the ed 
number of inches of vacuum. A mercury column_-may oe) 
, ; : Fig. 22 
be used in the place of the vacuum gauge. In the 
= < Mercury 
rear of the dome there are two sight glasses. Through Column 
: Z aie we Eee Courtesy of 
these the interior of the pan is illuminated by means cp, Soeera 
