YORK INTERNATIONAL 47
FORM 160.49-O1
TABLE 3 – SYSTEM PRESSURES (STANDARD)
*GAUGE ABSOLUTE
BOILING
INCHES OF TEMPERATURES
MERCURY (HG) MILLIMETERS OF
BELOW ONE PSIA OF MERCURY MICRONS WATER
STANDARD (HG) °F
ATMOSPHERE
0 14.696 760. 760,000 212
10.24" 9.629 500. 500,000 192
22.05" 3.865 200. 200,000 151
25.98" 1.935 100. 100,000 124
27.95" .968 50. 50,000 101
28.94" .481 25. 25,000 78
29.53" .192 10. 10,000 52
29.67" .122 6.3 6,300 40
29.72" .099 5. 5,000 35
29.842" .039 2. 2,000 15
29.882" .019 1.0 1,000 +1
29.901" .010 .5 500 –11
29.917" .002 .1 100 –38
29.919" .001 .05 50 –50
29.9206" .0002 .01 10 –70
29.921" 0 0 0
*One standard atmosphere = 14.696 PSIA
= 760 mm Hg. absolute pressure at 32°F
= 29.921 inches Hg. absolute at 32°F
NOTES: PSIA = Lbs. per sq. in. gauge pressure
= Pressure above atmosphere
PSIA = Lbs. per sq. in. absolute pressure
= Sum of gauge plus atmospheric pressure
TABLE 3A – SYSTEM PRESSURES (METRIC)
GAUGE ABSOLUTE
BOILING
TEMPERATURES
KILOPASCALS
MILLIBARS OF
BELOW ONE
KILOPASCALS OF MERCURY MICRONS WATER
STANDARD
(HG) °C
ATMOSPHERE
0 101.3 1013.1 760,000 100.0
34.7 66.4 666.5 500,000 88.9
74.7 26.6 266.6 200,000 66.1
88.0 13.3 133.3 100,000 51.1
94.6 6.7 66.7 50,000 38.3
98.0 3.3 33.3 25,000 25.6
100.0 1.3 13.3 10,000 11.1
100.5 .84 8.4 6,300 4.4
100.6 .68 6.7 5,000 1.7
101.1 .27 2.7 2,000 –9.4
101.2 .13 1.3 1,000 –17.2
101.3 .069 .67 500 –23.9
101.3 .014 .13 100 –38.9
101.3 .007 .07 50 –45.6
101.3 .0014 .013 10 –56.7
101.3 0 0 0
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