GTLB Series F400 120 Rated Fans - Klimats24.lv
GTLB Series F400 120 Rated Fans - Klimats24.lv
GTLB Series F400 120 Rated Fans - Klimats24.lv
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Performance curves - <strong>GTLB</strong>-3-031<br />
Belt-driven, single inlet,<br />
backward impellers<br />
Impellers diameter: 315 mm<br />
Pt<br />
Pa<br />
mmWG<br />
Note: Only <strong>GTLB</strong> models are available in the<br />
smoke extract version 400ºC/2h, and<br />
can operate at a minimum speed of<br />
3100 rpm.<br />
Acoustic characteristics<br />
The sound levels shown in the curves are<br />
sound power levels in dB(A), on the outlet<br />
side of the fan with inlet and outlet ducted.<br />
The correction values K(f) given in the table,<br />
are used to calculate the radiated noise levels<br />
according to each frequency band (f), depending<br />
on the position.<br />
Measured position<br />
LwA(f) = LwA + K(f)<br />
Centrifugal direct drive fans <strong>GTLB</strong><br />
1 = Discharge duct<br />
2 = Inlet duct<br />
3 = Radiated (with inlet and discharge ducts)<br />
4 = At the discharge (free)<br />
Test set up Speed of Corrections K(f)<br />
the impeller<br />
Frequency bands (f), Hz<br />
Position (s) (rpm) 63 125 250 500 1000 2000 4000 8000<br />
At the discharge<br />
duct (1)<br />
0 - 1928 25 17 4 7 7 7 14 18<br />
1929 - 3600 27 18 14 5 6 6 11 17<br />
At the inlet<br />
duct (2)<br />
0 - 1928 25 17 5 4 5 9 10 17<br />
1929 - 3600 28 21 17 3 4 7 9 17<br />
Radiated with ducts 0 - 1928 33 24 13 12 12 13 22 33<br />
at the inlet and at 1929 - 3600 36 28 17 12 10 14 22 36<br />
the discharge (3)<br />
At the discharge<br />
(free discharge-4)<br />
0 - 1928 39 24 7 8 7 7 14 18<br />
1929 - 3600 44 25 17 6 6 6 11 17<br />
335
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