220mm 24/48V DC Backward Curved Centrifugal Fan

SKU:

HF220/45D2B1, HF220/45D4B1

Impeller Diameter: 220mm

Impeller Material: PA Plastic + Glass Fiber

Motor Type: BLDC External Rotor Motor

Bearing: Ball Bearing

Speed Control:0-10VDC/PWM

Signal Output: FG

Protection Type: IP44

Insulation Class: B

Motor Protection: Locked-Rotor/Reverse Polarity/Over Voltage/Soft Start

Product Parameters

Model	Rated Voltage	Operating Voltage	Rated Current	Rated Power	Rated Speed	Air Flow	Air pressure	Noise Level	Perm.Amb. Temp.	Weight
Part NO.	VDC	VDC	A	W	RPM	M³/h	Pa	dBA	ºC	Kg
HF220/45D2B1	24	16~28	4.6	110	3100	1040	699	76	-25~+60	1.35
HF220/45D4B1	48	36~56	2.3	110	3100	1040	699	76	-25~+60	1.35

A backward curved centrifugal fan is shaped like a cylinder with several large curved blades and a conical inlet nozzle. The fan blades incline opposite the direction of rotation.
A backward curved centrifugal fan can be used on its own as well as within a scroll because of its mechanisms in creating the airflow.
A backward curved centrifugal fan provides you with high-speed operation that you need in an environment of high static pressure, and it also handles inconsistencies in your facility’s pressure better than forward-curved centrifugal fans.
The optimum operating area for a backward curved centrifugal fan is an area in the middle of its performance characteristic. Above and below the area the fan makes more noise and works less efficiently. But it does not mean the other points on the characteristic curve should not be operated. A backward curved motorized fan does not have a stall point on its characteristic.