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Jet nozzles - TROX - #3

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Preliminary Selection
The table below gives a guide for selecting the size of jet nozzles.
The values shown are determined for an isothermal, single free horizontal air stream. According to our extensive experience, air velocities of 0.25 m/s for example, with a throw of 30 m, are only possible in theory as many room parameters must be taken into account with such throw distances. If the supply air temperature difference changes, the air stream deflection in diagram 2 (page 9) must be taken into account.
The noise levels apply to types DUK-F and DUK-V. For other design variants, corrections must be made.
In the table below no data is given for effective discharge velocities below 2 m/s nor are values given above a sound power level rating of 55 dB(A). If the values required lie outside the limits of this table the procedures on page 8 should be followed. On our web site www.trox.de we offer an electronic selection programme.
Data for axial air flow, types DUK-F and DUK-V
Throw
Air
Size
10 m
20 m
30 m
Velocity
Lwa
L
wnc
.V
L
wa
Lwnc
.V
Lwa
L
wnc
dB(A)
NC
l/s
dB(A)
NC
l/s
dB(A)
NC
m/s
...-F
...-V*
...-F
...-V*
...-F
...-V*
...-F
...-V*
...-F
...-V*
...-F
...-V*
100
-
-
-
-
-
26
31
29
30
23
39
42
41
41
35
125
-
-
-
-
-
34
27
25
26
22
50
37
36
37
30
160
23
<20
<20
<20
<20
46
<20
<20
<20
<20
69
32
35
33
28
200
29
<20
<20
<20
<20
61
<20
<20
<20
<20
85
26
27
25
20
0.25
250
37
<20
<20
<20
<20
76
<20
<20
<20
<20
106
23
22
23
< 20
315
50
<20
<20
<20
<20
98
<20
<20
<20
<20
150
21
20
22
< 20
400
65
<20
<20
<20
<20
129
<20
<20
<20
<20
195
< 20
< 20
21
< 20
100
26
31
29
30
23
52
50
50
49
45
-
-
-
-
-
125
34
27
25
26
22
68
46
46
45
40
-
-
-
-
-
160
46
<20
<20
<20
<20
92
39
44
40
37
138
50
55
51
49
200
61
<20
<20
<20
<20
121
36
38
35
31
182
47
50
47
44
0.5
250
76
<20
<20
<20
<20
152
32
34
32
26
229
43
45
43
39
315
98
<20
<20
<20
<20
195
27
28
28
20
293
39
40
40
32
400
129
<20
<20
<20
<20
258
27
20
28
< 20
387
37
33
39
26
100
52
50
50
49
45
-
-
-
-
-
-
-
-
-
-
125
68
46
46
45
40
-
-
-
-
-
-
-
-
-
-
160
92
39
44
40
37
-
-
-
-
-
-
-
-
-
-
200
121
36
38
35
31
242
49
-
49
-
-
-
-
-
-
1.0
250
152
32
34
32
26
305
51
53
51
47
-
-
-
-
-
315
195
27
28
28
20
390
47
48
48
41
585
53
-
54
-
400
258
27
20
28
< 20
516
45
42
43
35
773
51
53
53
47
See p. 11 for corrections for deflection angle
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