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Stand
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Swirl Diffusers - 17 Pages
Acoustic Data
Correction to Diagram 7: Damper angle Correction to Diagram 9: Damper angle
Blade angle 0° 45° 90° Blade angle 0° 45° 90°
Correction to Diagram 8: Damper angle H Correction to Diagram 10: Damper angle
7 Sound power level and pressure drop Size 250
Construction with discharge nozzle
30 40 50 60 \/s 100 150 200 250
150 200 m3/h 400 600 800
8 Sound power level and pressure drop Size 250
Construction without discharge nozzle
30 40 50 60 l/s 100 140 180
150 200 m3/h 400 500 600
9 Sound power level and pressure drop Size 315
Construction with discharge nozzle
100 |-1-1-1-1--,-1-1
50 60 I /s 80 100 120 150 200 250
200 m3/ h 300 400 500 600 700 900
10 Sound power level and pressure drop Size 315
Construction without discharge nozzle
1001-1-1-1-1—I-1-1-r
50 60 l/s 80 100 120 160 200
200 m3/h 300 400 500 600 700
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P. 1
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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
Acoustic Data Correction to Diagram 3: Damper angleBlade angle0°45°90°Ap,x 1x 1.2x2.4 + 1+ 3 + 1+ 3 Correction... -
P. 9
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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... -
P. 14
Diagrams 25 to 28: Permitted volume flow ranges see Selection Table Page 6. Diagrams 25 to 28 are applicable to configurations with discharge...
