Centrifugal Fans AT belt driven - Nicotra Gebhardt

AT 20/20
Technical Data
Impeller Data Impeller Data
Impeller diameter
Number of blades
Dr z
516
42
mm Impeller weight
Density of media
Moment of Inertia
J 1.175 kgm² Tolerance class (DIN 24166)
Performance Curves
Please note coloured area!
N all types suitable
N do not use in this area
2500
Pa
2000
1500
1000
p F
76
800
600
500
400
300
200
150
100
80
60
50
0.09
40
2000
q V
1.4
v2 p d2
P r
0.18
2
SX
3000
0.37
0.55
0.75
1.1
1.5
2.2
60
3.0
4.0
5.5
65
kW
7.5
70
11
54%
75
15
59
80
85
m 20 kg
r 1 1.2 kg/m³
2
4000 5000 6000 8000 10000 15000 20000 30000 40000
2 3 4 5 6 7 8 9 10 14 20 30
∆L Wrel4 (A)
Duty Speed
point 1/min
dB
SX 1100 3
SX 700 3
SX 400 2
qV opt 1100 3
qV opt 700 2
qV opt 400 2
DX 1100 3
DX 700 2
DX 400 2
Normal operation area
1
DX
L WA 7
4 6 8 10 20 40 60 80 100 200 400
65
22
90
68
95
65
100
2 3 4 5 6 7 8 9 10 14 m³/s
63 125 250 500 1000 2000 4000 8000 Hz
8 2 5 -4 -9 -12 -14 -18 dB
11 8 -1 -2 -9 -10 -13 -19 dB
12 4 2 -5 -6 -8 -14 -20 dB
3 -1 5 -4 -8 -11 -12 -17 dB
6 7 -1 -2 -8 -9 -12 -18 dB
10 3 2 -4 -6 -8 -13 -20 dB
-2 -5 1 -3 -6 -9 -10 -14 dB
0 2 -2 -3 -6 -7 -11 -16 dB
4 0 0 -4 -5 -8 -12 -18 dB
η r
Belt Driven Centrifugal Fans / AT / Technical Data
Performance certified is for installation type B - free inlet, ducted outlet.
Power rating (kW) does not include transmission losses.
Performance ratings do not include the effects of appurtenances (accessories).
Relative sound power level for inlet side L Wrel7 at octave
centre frequencies f c
Nicotra Gebhardt S.p.A certifies that the fan shown herein is licensed to bear the AMCA Seal.
The ratings shown are based on tests and procedures performed in accordance with AMCA
Publication 211 and comply with the requirements of the AMCA Certified Ratings Program.
The AMCA Certified Ratings Seal applies to air performance ratings only.
58
48
105 dB
m³/h
m/s
600 800 Pa
1/min
1400
1300
1200
1000
900
800
700
600
500
400
300
W
8
7
350 6
5
250 4
N
24
22
20
1100 19
17
15
14
12
10
AT TIC
63 125 250 500 1000 2000 4000 8000 Hz
13 8 9 -1 -8 -11 -12 -16 dB
17 13 2 0 -8 -8 -11 -18 dB
16 7 4 -4 -4 -7 -13 -21 dB
8 4 9 -1 -6 -10 -11 -15 dB
12 12 2 0 -7 -8 -11 -17 dB
15 6 4 -3 -5 -7 -12 -21 dB
1 1 5 0 -4 -7 -8 -14 dB
5 7 2 0 -4 -6 -10 -15 dB
9 4 3 -2 -4 -7 -12 -19 dB
P b
Measured in installation B
according to ISO 5801:
Relative sound power level for discharge side L Wrel4 at
octave centre frequencies f c