Product Application

Inner rotor axial fan is a highly efficient and compact cooling device, whose core feature is that the motor rotor is located on the inside of the stator and directly drives the impeller through the main shaft. Compared to outer rotor fans, this structure enables it to achieve higher speeds and greater air pressure, making it particularly suitable for scenarios with limited installation space that require forced ventilation and heat dissipation against certain resistance, such as industrial and commercial equipment like electrical cabinets, small cooling towers, chillers, and heat pumps.

To ensure safe and efficient operation, it is typically equipped with an external metal protective grille, which effectively prevents foreign objects from entering. It is crucial to note during use: the fan must never be operated without the impeller installed, as its motor relies entirely on the airflow generated by the rotating impeller for cooling. Running without load will instantly cause the motor to overheat and fail.

Basic Information

Fan Type	AC Φ350-Φ650mm Aluminum Alloy Impeller Internal Rotor Motor Axial Fan
Blade/Net mesh Material	Aluminium Alloy
Guard Material	Carbon Steel
Motor	AC Internal Rotor Motor
Speed	Single Speed
Protection Class	IP54/IP55
Insulation Class	B
Useage	This fan is suitable for a wide range of applications, including small cooling towers, electrical cabinet cooling, chillers, condenser units, and heat pumps. Its aluminum impeller provides corrosion resistance, making it ideal for use in low-humidity environments.

Main Features

1. Inner Rotor Design: Efficient direct drive, high speed, and strong static pressure.

2. Wide Applications: General-purpose for industrial cooling, such as cooling towers, electrical cabinets, and heat pumps.

3. Aluminum Impeller: Corrosion-resistant, ideal for low-humidity environments.

4. Compact Structure: Small footprint, designed for space-constrained thin-profile equipment.

5. Protective Grille: Prevents foreign object entry, meets industrial safety standards.

Technical Parameters

Type	Impeller Diameter (mm)	Voltage (VAC)	Frequency(HZ)	Input power (W)	Speed (Rpm)	Max Airflow (M3/h)	Noise(dB)
YWF-N-4-350	φ350	220/380	50/60	120	1400	2500	64
YWF-N-4-400	φ400	220/380	50/60	180	1400	3480/3600	64
YWF-N-4-450	φ450	220/380	50/60	250	1400	5000	73
YWF-N-6-450	φ450	220/380	50/60	90	920	2800	58
YWF-N-4-500	φ500	380	50	550	1400	7450	78
YWF-N-6-500	φ500	380	50	370	930	4450	63
YWF-N-4-550	φ550	380	50	750	1400	11000	82
YWF-N-6-550	φ550	380	50	370	930	6000	65
YWF-N-8-550	φ550	380	50	250	700	4500	56
YWF-N-4-600	φ600	380	50	1100	1400	11000	83
YWF-N-6-600	φ600	380	50	550	930	6700	69
YWF-N-8-600	φ600	380	50	370	700	5500	60
YWF-N-4-650	φ650	380	50	1300	1400	15100	86
YWF-N-6-650	φ650	380	50	550	940	10000	73
YWF-N-8-650	φ650	380	50	370	700	7850	69

Company Profile

SHANGHAI WEIMA ELECTRIC EQUIPMENT CO., LTD was established in 2009 and is located in the internationally renowned and conveniently located, beautiful city of Shanghai.The company has strong technical force and advanced production equipment, has perfect quality assurance system and first-class testing equipment, is a professional production of various types of micro motor, (fan), outer rotor axial flow fan, pipeline axial flow fan, centrifugal fan, a variety of blower, a new air change machine ventilation, ventilation equipment. Enterprises through the ISO9001 quality management system certification, ISO14001 environmental management system certification, products through the CCC, CE certification, the outer rotor fan made in the national industrial products production license.

In the fierce market competition, enterprises rely on strict scientific management, reliable quality of products around the world to win the trust of our customers.We have first-class CNC machining equipment, with an annual production capacity of millions of units, and we have 15 years of experience in the research and development and production of fans and motors.During the processing of our products, strict quality inspections are carried out before leaving the factory. Welcome to call us for any custom fan or motor solution.

Contact: Ameiy Email: wormal03@weimash.com Wechat(whatsapp): 86-18001760128 MOQ: 100 pcs.

Packaging&Shipping：

Our products are usually packed in cardboard boxes with PE bags inside. We will pay attention to prevent collision, and the shipping mark can be made according to customer's requirements.

 Payment terms ,Delivery and Service：

Payment: All payments can be negotiated, usually by T/T or L/C at sight.

Delivery time: After receiving your payment, we will arrange production. We will ship the goods to your port of delivery as soon as possible.

Service: One year warranty, online technical service.

FAQ:

Q1:If there is no product size that meets the requirements, can it be customized?

A:If we can produce the required products, we can produce the required products according to the drawings and requirements provided by customers.

Q2:How long does it take to produce?

A:There is a stock can be sent Immediately. If there is no stock, one month at the latest.

Q3:How long does it take to ship?

A:It will take about 5-7 days to arrive by express and air. It may take up to a month to ship. It takes different time for different geographical locations.

Q4:Can you provide samples?

A:Yes. We can provide samples, but because most of the samples are sent by express, the cost may be very high.

 After-sale Service:

Guide installation

Guidance on online service delivery

Advance service, whole process service

Communicate operation with customer's technicians