DataSheet CAP CT201811

6 / 9 | Nozzle Diffusers
Technical Parameters
p
s
Pa Pressure drop
q
V
m
3
/h, l/s Air ow volume
L
WA
dB(A) A-weighted total sound power level
L
W
dB Non-weighted total sound power level
ΔT K Temperature difference Supply air - Room air
L
0,2
m Air throw length with terminal velocity 0,2 m/s
Calculation of Air Throw for Different Terminal Velocities
L
x
= L
0,2
× 0,2/x
Diagram 1: Pressure drop & A-weighted total sound power level
depending on air ow volume
Legend
200
160
120
90
70
60
50
25
30
20 30 35
24060 140
15 2510
40 50 70 120
CAP-CT-100
15
q
V
(m
3
/h)
q
V
(l/s)
p
s
(Pa)
L
WA
= 40 dB(A)
25
80 100 180
20
30
40
30
35
45
40 6050
25% 50% 75%
100%
0%
Diagram 2: Isothermal air throw lengths for horizontal radial discharge
with terminal velocity 0,2 m/s, depending on air ow volume
Diagram 3: Pressure drop & A-weighted total sound power level
depending on air ow volume
Diagram 4: Isothermal air throw lengths for horizontal radial discharge
with terminal velocity 0,2 m/s, depending on air ow volume
180
150
120
90
70
60
50
45
20 30 35
35080 200
25 9015
60
70 90 160
CAP-CT-125
15
q
V
(m
3
/h)
q
V
(l/s)
p
s
(Pa)
L
WA
= 40 dB(A)
25
120 140 250
40
30
35
45
40 45
25%
50% 75%
0%
100%
50 60 70 80
300
3
2
1
0,8
0,6
0,4
30
20 30 35
24060 140
15 2510
40 50 70 120
CAP-CT-100
0,2
q
V
(m
3
/h)
q
V
(l/s)
L
0,2
(m)
80 100 180
40 6050
ΔT = -10 K ΔT = 10 K
0,75 0,83
Correction Tables
NOTE: For vertical distribution see Systemair DESIGN.
e.g.: L
(ΔT = 10 K)
= L
(ΔT = 0 K)
× 0,83
Tab. 2: Correction factors for horizontal distribution Tab. 3: Correction factors for horizontal distribution - alternative nozzle settings
e.g. for 3 way horizontal diffusion: L
0,2 (3 way)
= L
0,2 (radial)
× 1,9
4 way 3 way 2 way 1 way
1,40 1,90 2,30 3,30
3
2
1
0,5
0,3
L
0,2
(m)
20 30 3525 9015
CAP-CT-125
q
V
(l/s)
40 45 50 60 70 80
45 35080 200
60
70 90 160
q
V
(m
3
/h)
120 140 250
300
L
x
m
Air throw length calculated for specic
terminal velocity
x m/s Terminal velocity in range of 0,1 m/s ... 1 m/s
0%,
25%, 50%, 75%,
100%
The plenum box damper positions in pressure drop/
noise diagrams are represented as a percentage.
0% is a fully closed damper.
100% is a fully open damper.