Table of Contents
Advertisement
TABLE 3 –
SYSTEM PRESSURES
*GAUGE
INCHES OF
MERCURY (HG)
BELOW ONE
STANDARD
ATMOSPHERE
0
10.24"
22.05"
25.98"
27.95"
28.94"
29.53"
29.67"
29.72"
29.842"
29.882"
29.901"
29.917"
29.919"
29.9206"
29.921"
*One standard atmosphere
VACUUM TESTING
ABSOLUTE
MILLIMETERS
PSIA
OF MERCURY
14.696
9.629
3.865
1.935
.968
.481
.192
.122
.099
.039
.019
.010
.002
.001
.0002
0
= 14.696 PSIA
= 760 mm Hg. absolute pressure at 32°F
= 29.921 inches Hg. absolute at 32°F
MICRONS
(HG)
760.
760,000
500.
500,000
200.
200,000
100.
100,000
50.
50,000
25.
25,000
10.
10,000
6.3
6,300
5.
5,000
2.
2,000
1.0
1,000
.5
500
.1
100
.05
.01
0
NOTES:
PSIA = Lbs. per sq. in. gauge pressure
PSIA = Lbs. per sq. in. absolute pressure
NOTE: Be sure the vacuum indicator is valved off
while holding the system vacuum and be
sure to open the valve between the vacuum
indicator and the system when checking the
vacuum after the 8 hour period.
BOILING
TEMPERATURES
OF
WATER
°F
212
192
151
124
101
78
52
40
35
15
+1
–11
–38
50
–50
10
–70
0
= Pressure above atmosphere
= Sum of gauge plus atmospheric pressure
51
Hide quick links:
Advertisement
Table of Contents
