Centrifugal Fans AT belt driven - Nicotra Gebhardt

AT 25/25
Technical Data
Impeller Data Impeller Data
Impeller diameter
Number of blades
Dr z
636
56
mm Impeller weight
Density of media
Moment of Inertia
J 2.753 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
84
800
600
500
400
300
200
150
100
80
60
50
40
0.12
v 2
P r
0.25
3000
0.8
qV 1.4
1
0.55
0.8 1 2
pd2 m 33 kg
r 1 1.2 kg/m³
2
4000 5000 6000 8000 10000 15000 20000 30000 40000 60000
∆L Wrel4 (A)
Duty Speed
point
1/min
dB
SX 800 3
SX 500 2
SX 300 2
qV opt 800 3
qV opt 500 2
qV opt 300 2
DX 800 2
DX 500 2
DX 300 2
0.75
1.1
SX
1.5
2.2
3.0
4.0
5.5
7.5
Normal operation area
kW
11
65
DX
47%
70
15
75
4 6 8 10 20 40 60 80 100 200 400
57
80
L WA 7
22
85
65
90
30
69
95
100
65
54
105 dB
600
39
m³/h
Pa
1/min
1000
2 3 4 5 6 7 8 9 10
20 m³/s Measured in
installation B
2 3 4 5 6 7 8 9 10 14 20 30 m/s according to ISO 5801:
63 125 250 500 1000 2000 4000 8000 Hz
5 7 3 -5 -7 -10 -11 -17 dB
8 8 -2 -3 -7 -7 -13 -19 dB
12 3 0 -4 -5 -9 -15 -21 dB
4 6 2 -5 -7 -10 -11 -17 dB
7 7 -2 -3 -7 -7 -13 -19 dB
12 3 0 -4 -5 -8 -15 -21 dB
3 3 -1 -5 -6 -7 -9 -13 dB
4 2 -5 -4 -6 -7 -10 -15 dB
5 1 -2 -4 -5 -8 -11 -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.
900
800
750
700
650
600
550
500
450
400
350
300
250
200
N
W
21
19
17
16
15
14
13
12
11
9
8
7
6
5
4
AT TIC
Relative sound power level for discharge side L Wrel4 at
octave centre frequencies f c
63 125 250 500 1000 2000 4000 8000 Hz
9 12 6 -3 -7 -8 -10 -16 dB
14 12 1 -3 -6 -6 -11 -19 dB
17 6 1 -3 -3 -7 -14 -23 dB
8 11 6 -2 -5 -8 -10 -16 dB
12 11 2 -2 -6 -6 -11 -19 dB
16 7 2 -2 -3 -7 -14 -23 dB
6 8 3 -2 -4 -6 -8 -13 dB
9 6 -1 -1 -4 -5 -10 -15 dB
10 4 1 -2 -3 -7 -12 -21 dB
P b