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 Technical    Vacuum Pressure Tables 
Connexion Vacuum to Pressure Conversion Chart  
Please find below our Vacuum Torr to mmHgA to psia to HgC to Atm to H2O (a) to H2O (v) to Kg/cm2 to kPa to mBar vacuum conversion table.
Valves designed to be able to control vacuum or suction are specifically designed for the application and standard valves should not be used. Typically for this application a direct acting & assisted lift solenoid valve with NBR seals should be used as EPDM and Viton can stick and PTFE tends to easily leak especially for larger sizes above 1/2" as PTFE does has very limited elasticity.
 
Torr
mmHgA
psia
"HgA
"HgV
Atm.
"H2O(a)
"H2O(v)
kg/sq.cm
kPa
mBar
760
760
14.7
29.92
0.00
1.00
406.8
0.0
1.03
101.31
1013.3
700
700
13.54
27.56
2.36
0.92
374.7
32.1
0.95
93.31
933.3
600
600
11.61
23.62
6.30
0.79
321.2
85.6
0.82
79.98
800.0
500
500
9.67
19.69
10.24
0.66
267.7
139.2
0.68
66.65
666.7
400
400
7.74
15.75
14.17
0.53
214.1
192.7
0.54
53.32
533.3
300
300
5.80
11.81
18.11
0.39
160.6
246.2
0.41
39.99
400.0
250
250
4.84
9.84
20.08
0.33
133.8
273.0
0.34
33.33
333.3
200
200
3.87
7.87
22.05
0.26
107.1
299.8
0.27
26.66
266.7
175
175
3.38
6.89
23.03
0.23
93.7
313.2
0.24
23.33
233.3
150
150
2.90
5.91
24.02
0.20
80.3
326.5
0.20
20.00
200
125
125
2.42
4.92
25.00
0.16
66.9
339.9
0.17
16.66
166.7
100
100
1.93
3.94
25.98
0.13
53.5
353.3
0.14
13.33
133.3
90
90
1.74
3.54
26.38
0.12
48.2
358.7
0.12
12.00
120.0
80
80
1.55
3.15
26.77
0.11
42.8
364.0
0.11
10.66
106.7
70
70
1.35
2.76
27.17
0.09
37.5
369.4
0.10
9.33
93.3
60
60
1.16
2.36
27.56
0.08
32.1
374.7
0.08
8.00
80.0
51.7
51.7
1.00
2.04
27.89
0.07
27.7
379.2
0.07
6.89
68.9
50
50
0.97
1.97
27.95
0.07
26.8
380.1
0.07
6.67
66.7
40
40
0.77
1.57
28.35
0.05
21.4
385.4
0.05
5.33
53.3
30
30
0.58
1.18
28.74
0.04
16.1
390.8
0.04
4.00
40.0
25.4
25.4
0.49
1.00
28.92
0.03
13.6
393.2
0.03
3.39
33.9
25
25
0.48
0.98
28.94
0.03
13.4
393.5
0.03
3.33
33.3
20
20
0.39
0.79
29.13
0.03
10.7
396.1
0.03
2.67
26.7
15
15
0.29
0.59
29.33
0.02
8.0
398.8
0.02
2.00
20.0
10
10
0.19
0.39
29.53
0.01
5.4
401.5
0.01
1.33
13.3
7.5
7.5
0.15
0.30
29.63
0.01
4.0
402.8
0.01
1.00
10.0
5
5
0.10
0.20
29.72
0.01
2.7
404.2
0.01
0.67
6.7
2.5
2.5
0.05
0.10
29.82
0.00
1.3
405.5
0.00
0.33
3.3
1
1
0.02
0.04
29.88
0.00
0.5
406.3
0.00
0.13
1.3
0.75
0.75
0.01
0.03
29.89
0.00
0.4
406.4
0.00
0.10
1.0
0.5
0.5
0.01
0.02
29.90
0.00
0.3
406.6
0.00
0.07
0.7
0.25
0.25
0.00
0.01
29.91
0.00
0.1
406.7
0.00
0.03
0.3
0.1
0.1
0.00
.000
29.92
0.00
0.1
406.8
0.00
0.01
0.1
 
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