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2 Description
The CompAir PSA range of nitrogen generators operate on the Pressure Swing Adsorption (PSA) principle to produce a continuous stream of
nitrogen gas from clean dry compressed air.
Pairs of dual chamber extruded aluminium columns, filled with Carbon Molecular Sieve (CMS), are joined via an upper and lower manifold to
produce a two bed system. Whilst one bed is online and removing oxygen from the process air the other is regenerated.
Clean, dry particulate free compressed air enters the bottom of the online bed and flows up through the CMS. Oxygen and other trace gases are
preferentially adsorbed by the CMS, allowing nitrogen to pass through. At the end of this adsorption phase the inlet, outlet and exhaust valves
close on both beds. The upper and lower equalisation valves open, allowing the pressure to equalise between the beds. This equalisation phase
is designed to reduce energy consumption and enhance the overall performance of the generator.
Once equalised the bed entering regeneration is depressurised. The oxygen adsorbed during the adsorption phase is vented to atmosphere via
an exhaust valve and silencer. A small proportion of the outlet nitrogen gas is also expanded into this bed to help the desorption of oxygen from
the CMS.
The bed entering the adsorption phase is pressurised using a controlled flow of nitrogen gas from the nitrogen buffer vessel (Back Fill) and a
controlled flow of clean, dry, particulate free compressed air (Front Fill).
The CMS beds alternate between adsorption and regeneration modes to ensure continuous and uninterrupted nitrogen production.
2.1 Technical Specification
Product Selection
CompAir
Model
m3/hr
CN2-20P
CFM
m3/hr
CN2-25P
CFM
m3/hr
CN2-35P
CFM
m3/hr
CN2-45P
CFM
m3/hr
CN2-55P
CFM
m3/hr
CN2-60P
CFM
m3/hr
CN2-65P
CFM
m3/hr
CN2-75P
CFM
m3/hr
CN2-80P
CFM
Air : N2
)
(CN2-20 - CN2-55
Air : N2
(CN2-60 - CN2-65)
Air : N2
(CN2-75 - CN2-80)
Bar g
Outlet
Psi g
6
o
PSA Performance @ 20
C (68
5 ppm 10ppm 50ppm 100ppm 250ppm 500ppm 0.10%
3.5
4.5
6.7
8.0
2.1
2.6
3.9
4.7
5.3
6.8
10.1
12.0
3.1
4.0
5.9
7.1
7.0
9.0
13.4
16.0
4.1
5.3
7.9
9.4
8.8
11.3
16.8
20.0
5.2
6.7
9.9
11.8
10.5
13.5
20.1
24.0
6.2
7.9
11.8
14.1
11.6
15.0
22.3
26.6
6.8
8.8
13.1
15.7
13.3
17.1
25.5
30.4
7.8
10.1
15.0
17.9
14.5
18.6
27.7
33.1
8.5
10.9
16.3
19.5
16.1
20.7
30.8
36.8
9.5
12.2
18.1
21.7
9.3
7.2
5.1
4.6
9.8
7.6
5.3
4.9
10.1
7.8
5.5
5.0
6.0
6.0
6.0
6.0
87.0
87.0
87.0
87.0
o
F)Ambient Air Temperature & 7 barg (101.5 psi g) Air inlet pressure
0.40%
9.7
11.1
12.4
5.7
6.5
7.3
14.6
16.7
18.6
8.6
9.8
10.9
19.4
22.2
24.8
11.4
13.1
14.6
24.3
27.8
31.0
14.3
16.4
18.2
29.1
33.3
37.2
17.1
19.6
21.9
32.3
36.9
41.2
19.0
21.7
24.2
36.9
42.2
47.1
21.7
24.8
27.7
40.2
46.0
51.3
23.7
27.1
30.2
44.6
51.1
57.0
26.3
30.1
33.5
4.1
3.7
3.4
4.3
3.9
3.5
4.4
4.0
3.7
5.9
5.9
5.8
85.6
85.6
84.1
0.50%
1%
2%
16.7
17.7
21.3
25.3
9.8
10.4
12.5
14.9
25.1
26.6
32.0
38.0
14.8
15.7
18.8
22.4
33.4
35.4
42.6
50.6
19.7
20.8
25.1
29.8
41.8
44.3
53.3
63.3
24.6
26.1
31.4
37.3
50.1
53.1
63.9
75.9
29.5
31.3
37.6
44.7
55.5
58.9
70.8
84.1
32.7
34.7
41.7
49.5
63.5
67.3
80.9
96.1
37.4
39.6
47.6
56.6
69.1
73.3
88.2
104.7
40.7
43.1
51.9
61.6
76.8
81.4
98.0
116.4
45.2
47.9
57.7
68.5
2.9
2.8
2.6
2.3
3.0
2.9
2.7
2.5
3.1
3.0
2.8
2.5
5.8
5.7
5.7
5.6
84.1
82.7
82.7
81.2
3%
4%
5%
29.8
30.9
33.7
17.5
18.2
19.8
44.7
46.4
50.6
26.3
27.3
29.8
59.6
61.8
67.4
35.1
36.4
39.7
74.5
77.3
84.3
43.8
45.5
49.6
89.4
92.7
101.1
52.6
54.6
59.5
99.1
102.7
112.1
58.3
60.4
66.0
113.2
117.4
128.1
66.6
69.1
75.4
123.4
127.9
139.5
72.6
75.3
82.1
137.1
142.1
155.0
80.7
83.6
91.2
2.2
2.2
2.1
2.3
2.3
2.2
2.4
2.4
2.3
5.5
5.4
5.4
79.8
78.3
78.3
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