DWT‑I Axial‑Flow Roof Fan

Low‑noise & Energy‑saving：Wide twisted inclined blades reduce noise at low‑speed operation; adjustable blades (No.12+) optimize energy efficiency.
Flexible Performance Adjustment：17‑model series with wide air volume/pressure range; two‑speed or 25‑50 Hz variable‑frequency speed regulation for various working conditions.
Strong Environmental Adaptability：Standard, explosion‑proof and anti‑corrosion types available, stably working at ‑20℃~+40℃ and humidity＜90%.
Durable & Well‑equipped：High‑precision balanced impeller, integral‑formed shell and complete standard/optional accessories ensure stable and reliable operation.

Product Details

The DWT‑series axial‑flow roof fan features wide twisted inclined blades to reduce noise during low‑speed operation. It has 17 specifications with wide air volume and pressure range, and models No.12 and above adopt adjustable blades for energy‑saving and noise reduction. Equipped with two‑speed or variable‑frequency speed regulation, it adapts to different working‑condition demands. Available in standard, explosion‑proof and anti‑corrosion types, it stably operates at ‑20℃‑+40℃ with humidity below 90%, suitable for various ventilation occasions. With precisely balanced impeller and integrally‑formed shell, the fan has reliable structure and complete configurations, meeting diversified application requirements.

Performance Parameter Table

This table shows performance parameters of DWT‑I axial‑flow roof fan, covering No.3‑7 with multiple rotating speeds including 2850, 1450, 960, 720 and 560 r/min. It features wide ranges of air volume and total pressure, power from 0.04 to 1.5 kW and noise of 51‑73 dB(A). Complete supporting motor models are provided to meet requirements of air volume, pressure, noise reduction and energy‑saving operation in various ventilation scenarios. We also have other models of the same series, and there is always one suitable for you.

No.	Speed(r/min)	Air Volume(m³/h)	Total Pressure(Pa)	Motor Model	Power(kW)	Noise dB(A)
3	2850	3300	181	711‑2	0.37	66
		3000	206
		2600	232
	1450	1650	62	561‑4	0.06	52
		1560	66
		1450	72
	1450	1100	25	502‑4	0.04	51
		950	32
		800	37
4	2850	7450	193	801‑2	0.75	69
		6350	230
		5300	250
	1450	5700	176	801‑4	0.55	67
		5400	184
		4580	190
	960	3800	69	712‑6	0.25	62
		3400	80
		3000	85
5	1450	8000	135	801‑4	0.55	68
		7000	162
		5600	191
	960	7000	113	801‑6	0.37	63
		6700	122
		6400	131
	720	6000	88	802‑8	0.25	58
		5000	92
		4100	96
6	1450	15000	232	90L‑4	1.5	73
		14000	251
		13000	267
	960	11000	168	90L‑6	1.1	67
		10000	183
		9100	193
	720	8500	111	90L‑8	0.55	62
		8000	127
		7600	136
7	960	17500	165	100L‑6	1.5	69
		15000	201
		12500	212
	720	12000	141	100L1‑8	0.75	63
		11000	163
		9200	177
	560	9300	83	90L‑10	0.55	59
		8500	94
		7200	102

I. Applications of DWT‑I Axial‑Flow Roof Fan

It is suitable for ventilation and air exchange in medium‑low pressure and large‑flow sites such as warehouses, industrial plants, power stations, stations and gymnasiums.

II. Configuration of DWT‑I Axial‑Flow Roof Fan

Standard Configuration

Impeller, Fan Housing (outer cylinder, motor bracket), Motor, FRP Wind Cap, Safety Net

Spare Parts & Accessories (Please specify purchase requirement when ordering)

Manual or Electric Regulating Valve, Control Box, Gravity Louver, Bird‑proof Net

III.Processing Technology of DWT‑I Axial‑Flow Roof Fan

The fan impeller is made of steel or FRP. The cross frame is stamped and hydraulically formed from steel materials. Blades are hydraulically formed after aluminum alloy stamping, and riveted to the cross frame for assembly. The impeller undergoes static and dynamic balance correction with a balance accuracy not higher than Grade G5.6.
The outer cylinder flange is integrally formed by edge‑turning and spinning. The wind cap is one‑shot molded from FRP. The fan housing of explosion‑proof and anti‑corrosion explosion‑proof types is one‑shot molded from FRP.

Overall and Installation Dimensions

This table presents the overall and installation dimensions of DWT‑I axial‑flow roof fan from No.3 to No.11.2, including key parameters such as diameter, height, base frame size, anchor bolt specification and unit weight. Dimensions increase progressively with model numbers, and weight rises accordingly, providing direct guidance for equipment selection, roof foundation pre‑embedding and on‑site installation.

No.	ΦA	ΦD	F	G	E	Base Frame Dimension‑B	Base Frame Dimension‑C	H	M(d)*L	Weight(kg)
3	650	310	60	30	300	≤510	≥370	545	10.5*100	11
4	650	410	60	30	340	≤630	≥470	585	10.5*100	20
5	890	510	60	30	390	≤750	≥570	715	10.5*100	26
6	1000	610	60	30	440	≤870	≥670	765	12.5*120	41
7	1220	710	80	40	480	≤1000	≥800	950	12.5*120	62
8	1340	810	80	40	480	≤1100	≥900	950	12.5*120	90
9	1650	910	80	40	480	≤1250	≥1000	950	12.5*120	105
10	1650	1010	80	40	480	≤1400	≥1100	1105	12.5*150	155
11.2	1800	1130	80	40	480	≤1540	≥1240	1105	12.5*150	186

DWT‑I Axial‑Flow Roof Fan

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