BM-D Series Backward-curved Centrifugal Fan DC320/355mm

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Product Description

Model	Voltage [V]	Max Current [A]	Speed [rpm]	Max Power [W]	Max Airflow [m³/h]	Noise [dB(A)]
B320M.D001	48	5.21	1950	250	2390	67.4
B320M.D003	48	8.64	2300	415	2747	71
B355M.D001	48	5.0	1550	240	2960	71

DIMENSION

Model	A	B	C	D	E	F	G	H	I	J	K
B320M.D001	Ø318	Ø102	Ø214	Ø320	152	134.2	4.5	4-Ø4.5	31	Ø280	Ø300
B320M.D003	Ø318	Ø102	Ø214	Ø320	154	134.2	4.5	4-Ø4.5	31	Ø280	Ø300
B355M.D001	Ø360	Ø102	Ø250	Ø358	162	147	4	6-Ø4.5	31	Ø325	Ø350

Airflow-static pressure curve (P-Q)

Airflow-power curve (N-Q)

Core Selling Points

This series consists of 48V DC backward-curved centrifugal fans, featuring high airflow, high efficiency, low noise, stability, and easy installation. They are suitable for medium-to-high airflow ventilation applications such as precision air conditioners, fresh air purification, industrial heat dissipation, and equipment cooling, making them the optimal solution for efficient ventilation and reliable operation.

1. High-efficiency DC Power, Energy-saving & Durable

Adopts 48V DC brushless drive with excellent energy efficiency and lower power consumption, ensuring more economical long-term operation. Power range: 240–415W, speed range: 1550–2300rpm, stable working condition without overload.

2.High-airflow Design, Outstanding Ventilation Performance

Maximum single-unit airflow up to 2960m³/h. Backward-curved impeller ensures smooth airflow and low pressure loss, maintaining high-efficiency output even under high static pressure to meet large-flow ventilation demands.

3. Low-noise Operation, Quiet & Friendly

Optimized air path and dynamic balance design, noise controlled at 67.4–71dB(A). Low vibration and low wind noise even at high airflow, ideal for indoor scenarios with strict quiet requirements.

4. Standard Structure, Quick & Hassle-free Installation

Standardized dimensions and 4/6-M4.5 standard mounting holes offer strong universality for easy integration and replacement. Compact and robust structure, suitable for built-in equipment, cabinet integration, and air conditioning unit matching.

5. High Reliability & Long Service Life

Backward-curved impeller is dust-resistant and self-cleaning with high dynamic balance accuracy. Suitable for long-term continuous operation, high stability, and reduced later maintenance costs.