Greenheck-fan AX Manuel d'utilisateur télécharger pdf (Page 31)

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Performance shown is for installation Type B: Free inlet, Ducted outlet. Performance ratings do not include the effects of appurtenances in the airstream. The AMCA Certified Ratings

Seal applies to air performance ratings only.

Sound power level ratings are shown in decibels, referred to 10-12 watts calculated per AMCA Standard 301. Values shown are for inlet LwA sound power levels for 100%, 50% and

0% of peak pressure in Installation Type B: Free inlet, Ducted outlet. dBA sound pressure values are weighted with 11.5 dB attenuation for each octave band at 5 feet.

AX 72-275 9 Blades

Pitch Angle º

rpm 5 10 15 20 25 30 35

1770 (Bhp/kW)

1.70/1.27 2.93/2.19 4.27/3.18 5.78/4.31 7.52/5.61 9.61/7.17 12.1/9.06

1170 (Bhp/kW)

0.49/0.37 0.85/0.63 1.23/0.92 1.67/1.24 2.17/1.62 2.78/2.07 3.51/2.62

2900 (kW)

5.59 9.62 14.0 19.0 24.7 31.5 39.9

1450 (kW)

0.70 1.20 1.75 2.37 3.09 3.94 4.98

Peak Absorbed Power [Bhp/kW (60 Hz), kW (50 Hz)]

Inlet Sound

rpm LwA dBA

1770 +10 -1.5

1170 - -11.5

2900 +23 +11.5

1450 +5 -6.5

Volume

Total

Pressure

Impeller Diameter = 28.38 inches (721 mm)

Outlet Velocity

ft/min = cfm / 4.39

m/s = m

/s / 0.41

Tip Speed

ft/min = rpm X 7.43

m/s = rpm X 2.26

Sound Power A-Weighted [LwA]

Sound Pressure [dBA]

Air density = 1.2 kg/m

Air density = 0.075 lbs/ft

AX 72-275 9 Blades

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 63 64

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Greenheck-fan AX Manuel d'utilisateur Page 31

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