GDF

GDF Square Duct Centrifugal Fan

In-line centrifugal fan that drops straight into rectangular duct.

Frame sizes20
Airflow130–7,280 m³/h
Pressure to810 Pa
Duty points56

Single-inlet forward-curved impeller in a square casing whose inlet and outlet match standard rectangular duct sizes, so the fan connects flange-to-flange without transitions. Standard and acoustically lined versions are available; a filter can be fitted at the inlet.

Specification

Impeller	Forward-curved single-inlet, multi-blade
Casing	Galvanised steel, welded; acoustic version with colour-coated panels and perforated liner
Connection	Square inlet and outlet equal to duct size, direct flange connection
Drive	External rotor motor, direct coupled
Power	Three-phase 380 V / 50 Hz; selected models single-phase 220 V
Balance	≤ G5.6

Performance table

Measured on the factory test stand: 20 frame sizes, 130–7,280 m³/h, up to 810 Pa — 56 points on file. Standard air 20 °C, 101.3 kPa.

GDF 型离心式管道风机

20 sizes

Size	Speed (rpm)	Q (m³/h)	Pt (Pa)	Ps (Pa)	Motor	kW	dB(A)
GDF1.4-8	720	130	45	38	YDK-3-8	0.003	38
GDF1.4-4	1220	180	91	77	YDK-19-4	0.019	44
GDF2.5-8	690	600	80	65	YDK-40-8	0.04	46
		550	90	78	YDK-40-8	0.04	46
		450	100	92	YDK-40-8	0.04	46
GDF2.5-6	900	800	105	78	YDK-90-6	0.09	53
		720	128	106	YDK-90-6	0.09	53
		560	142	129	YDK-90-6	0.09	53
GDF2.5-4	1380	1200	225	164	YDK-250-4	0.25	61
		1000	300	258	YDK-250-4	0.25	61
		860	330	299	YDK-250-4	0.25	61
GDF3.0-8	690	1260	100	67	YDK-90-8	0.09	52
		1000	138	118	YDK-90-8	0.09	52
		800	156	143	YDK-90-8	0.09	52
GDF3.0-6	900	1640	158	102	YDK-180-6	0.18	58
		1300	220	185	YDK-180-6	0.18	58
		1060	246	223	YDK-180-6	0.18	58
GDF3.0-4	1380	2510	370	238	YDK-750-4	0.75	68
		2000	515	432	YDK-750-4	0.75	68
		1620	578	523	YDK-750-4	0.75	68
GDF3.5-10	550	1550	85	58	YDK-120-10	0.12	52
		1240	112	95	YDK-120-10	0.12	52
		900	128	119	YDK-120-10	0.12	52
GDF3.5-8	690	1993	126	81	YDK-250-8	0.25	57
		1588	176	148	YDK-250-8	0.25	57
		1286	197	179	YDK-250-8	0.25	57
GDF3.5-6	900	2599	214	138	YDK-450-6	0.45	60
		2071	298	250	YDK-450-6	0.45	60
		1678	335	304	YDK-450-6	0.45	60
GDF4.0-10	550	2300	130	95	YDK-180-10	0.18	56
		2000	175	148	YDK-180-10	0.18	56
		1780	190	169	YDK-180-10	0.18	56
GDF4.0-8	690	2700	210	161	YDK-370-8	0.37	61
		2400	260	222	YDK-370-8	0.37	61
		2120	285	255	YDK-370-8	0.37	61
GDF4.0-6	900	3600	373	286	YDK-900-6	0.9	68
		3200	462	393	YDK-900-6	0.9	68
		2800	500	448	YDK-900-6	0.9	68
GDF4.5-10	550	3200	185	145	YDK-370-10	0.37	60
		3000	220	185	YDK-370-10	0.37	60
		2750	250	221	YDK-370-10	0.37	60
GDF4.5-8	690	4000	300	237	YDWL1.8-8	0.8	66
		3760	340	285	YDWL1.8-8	0.8	66
		3500	380	332	YDWL1.8-8	0.8	66
GDF4.5-6	900	5300	510	400	YDK-1800-6	1.8	73
		5000	600	502	YDK-1800-6	1.8	73
		4660	650	565	YDK-1800-6	1.8	73
GDF5.0-10	550	4500	220	171	YDK-650-10	0.65	63
		4000	280	241	YDK-650-10	0.65	63
		3650	310	278	YDK-650-10	0.65	63
GDF5.0-8	690	5460	350	278	YDK-1800-8	1.8	70
		5000	430	369	YDK-1800-8	1.8	70
		4560	470	420	YDK-1800-8	1.8	70
GDF5.0-6	900	7280	600	471	YDWL3-6	3	76
		6700	740	631	YDWL3-6	3	76
		6080	810	720	YDWL3-6	3	76

Scroll the table sideways for the remaining columns. The CSV carries every column including efficiency and shaft power.

Download the full table (CSV) ↓

Design notes

No transitions neededSquare footprint matches duct dimensions, cutting installation time and leakage paths.
CompactFits inside ceiling voids where a fan box would not.
Acoustic variantPerforated inner liner with acoustic infill for noise-sensitive areas.
Filter optionInlet filter grille for dusty or grease-laden extract air.

Options

Acoustic casing
Inlet filter
Speed controller
Flexible connectors
Condensate tray

Applications

Office ceilings
Retail mezzanines
Cinemas
Hotel corridors

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