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Swirl Diffusers - 17 Pages
Acoustic Data
Correction to Diagram 3: Damper angle | |||
Blade angle | 0° | 45° | 90° |
Ap, | x 1 | x 1.2 | x2.4 |
+ 1 | + 3 | ||
+ 1 | + 3 | ||
Correction to Diagram 5: Damper angle | |||
Blade angle | 0° | 45° | 90° |
Ap, | X 1 | x 1.2 | x2.1 |
+ 1 | + 4 | ||
LWNC | + 1 | + 4 | |
Correction to Diagram 4: Damper angle | |||
Blade angle | 0° | 45° | 90° |
X 1 | x 1.1 | x 1.6 | |
+ 3 | + 3 | + 4 | |
+ 3 | + 3 | + 4 | |
Correction to Diagram 6: Damper angle | |||
Blade angle | 0° | 45° | 90° |
X 1 | x 1.2 | x 1.7 | |
+ 3 | + 4 | + 5 | |
LWNC | + 3 | + 4 | + 5 |
3 Sound power level and pressure drop Size 160
Construction with discharge nozzle
10 l/s 20 30 40 60 80
40 m3/h 60 80 100 150 200 250
5 Sound power level and pressure drop Size 200
Construction with discharge nozzle
30 40 50 60 l/s 100 140 180
150 200 m3/h 400 500 600
6 Sound power level and pressure drop Size 200
Construction without discharge nozzle
20 30 l/s 60 80 100 140
100 m3/h 200 300 400 500
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P. 1
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P. 3
Dependant on requirements of maximum volumetric flow, noise level and installation situation, swirl diffusers are available with or without discharge... -
P. 4
Construction • Dimensions The face section of the diffuser or side entry plenum box is demountable, held in position by a central fixing... -
P. 5
Installation • Fixing Because of their excellent performance, type RFD swirl diffusers can be installed flush with a continuous ceiling or freely... -
P. 6
Nomenclature · Quick Selection · Spectral Data·V·VA, BXH1vH1Nomenclaturein l/s:in m3/h:in m:in m:in m:in m/s:Lin m:vLͬ tZin m/s:in... -
P. 7
Example Data given: Type RFD-R-D-US/125 Volume flow per diffuser V = 24 l/s Required: Octave band sound power level of regenerated noise... -
P. 8
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P. 9
Acoustic Data Correction to Diagram 7: Damper angle Correction to Diagram 9: Damper angle Blade angle 0° ... -
P. 10
Acoustic DataExampleData given:·Volume flow per diffuserV = 30 l/sSupply air temperature differential ͬ t Z = – 8 KSound pressure level... -
P. 11
Air velocity at a distance 75 mm from the wall vL = 0.21 m/s L = X+H1 = 2.90 m L = A/2 + H1 = 2.90 m AtL/Atz = 0.019 At |_ = 0.019 x (-8)... -
P. 12
Aerodynamic Data RFD 160 Diagrams 17 to 20: Permitted volume flow ranges see Selection Table Page 6. Diagrams 17 to 20 are applicable to... -
P. 13
Diagrams 21 to 24: Permitted volume flow ranges see Selection Table Page 6. Diagrams 21 to 24 are applicable to configurations with discharge...
