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COMMON TERMS
Gases in the water will separate from the water as temperature rises.
4
Water boils at 212°F
– at sea level – unless it is contained under
pressure. At 52 psi gauge pressure, water would not boil until it
exceeded 300° F.
5
Minerals in the water will separate from the water as temperature is added.
This may lead to a much faster scaling rate in the tank.
Ex: 10 grains hardness; 2700 gallons of hot water per day.
Water stored at 140
°F in the tank may accumulate 19 lbs. of lime per year.
160°F in the tank may accumulate 85 lbs. of lime per year.
180°F in the tank may accumulate 135 lbs. of lime per year.
6
Adding heat to water may make it more corrosive.
Water may be 2 times more corrosive at 160°F than at 140°F.
Water may be
2 times mor
e cor
r
osive at 18
0°F than at 160°F.
7
TC-093
COMMON TERMS
The closed system illustrated requires the thermal expansion tank because
of the preceding #2 and #3 facts.