JOHNSON CONTROLS
30
FORM 160.81-NOM1
ISSUE DATE: 10/3/2020
SECTION 1 – INSTALLATION
TABLE 9 -
SYSTEM PRESSURES
*GAUGE
ABSOLUTE
BOILING
TEMPERATURES
OF WATER °F (°C)
INCHES OF MERCURY
(HG) BELOW ONE
STANDARD
ATMOSPHERE
PSIA
MILLIMETERS
OF MERCURY
(HG)
MICRONS
0
14.696
760
760,000
212 (100)
10.24*
9.629
500
500,000
192 (89)
22.05*
3.865
200
200,000
151 (66)
25.98*
1.935
100
100,000
124 (51)
27.95*
.968
0
50
0
50,000
101 (38)
28.94*
.481
0
25
0
25,000
0
78 (25)
29.53*
.192
0
10
0
10,000
0
52 (11)
29.67*
.122
000
6.3
0
6,300
0
40 (4)
29.72*
.099
00
5
0
5,000
0
35 (2)
29.842*
.039
00
2
0
2,000
0
15 (-9)
29.882*
.019
00
1.0
0
1,000
0
+1 (-17)
29.901*
.010
00
.5
000
500
0
-11 (-24)
29.917*
.002
00
.1
000
100
0
-38 (-39)
29.919*
.001
00
.05
0000
50
0
-50 (-46)
29.9206*
.0002
00
.01
0000
10
0
-70 (-57)
29.921*
0
00
0
00000
0
* One standard atmosphere = 14.696 Psia
NOTES: PSIG = Lbs. per sq. in. gauge pressure
= 760 mm Hg. absolute pressure at 32°F
= Pressure above atmospheric
= 29.921 inches Hg. absolute at 32°F
PSIA = Lbs. per sq. in. absolute pressure
= Sum of gauge plus atmospheric pressure
WATER
FREEZES
