4028 Brushless Direct Current DC Axial Fans

4028 High Speed Fan

With this function,the speed can be controlled by applying a pulse width modulated signal whose frequency maybe in the range of 25k Hz~30kHz.High voltage means 3~10V.Low voltage means 0~0.8V.Normally two kinds "Speed Vs duty cycle curve" are used.

 

Shenzhen Tenkai Special Electromechanical Limited leads the industry with the latest research and development - 4028 Brushless Direct Current DC Axial Fans, known for its highest static pressure and airflow performance in the industry. The maximum static pressure of this fan can reach 1635 Pa, and the maximum air volume can reach 1.09 m³/min. Type 4028 high-speed fan uses an efficient three-phase drive motor, combined with a new impeller and frame shape design, which greatly improves the aerodynamic performance and heat dissipation effect. The rotation speed is as high as 32000 min-1, the air flow is stronger, the static pressure is higher, and the service life is longer. longer. In addition, we optimized the shape of the stator blades to better match the shape of the impeller, further improving overall performance.

The fan also features PWM control, which can be used to precisely control the fan speed, thereby improving the energy efficiency of the device. At the same time, this product supports 12V and 24V voltages, has a wider range of applications, and can be used in many fields such as cooling servers, communication equipment, and telecommunications power supplies.

4028 Brushless Direct Current DC Axial Fans can not only improve the performance and extend the service life of various equipment, but also reduce the size of the equipment, providing users with a more convenient solution.

1. Do you customized cooling fans?

Yes, Cooling fans can be customized base on your requirement.

2. How do you guarantee the quality of products?

We use selected raw materials, strict production methods, and 100% inspection and certification before leaving the factory to ensure that the goods received by customers are consistent with our description.

3. How many kinds of bearings do you have for cooling fans?

We have sleeve bearings, hydraulic sleeve bearings and double ball bearings. The service life of sleeve fan is 25000 hours, that of hydraulic sleeve bearing is 30000 hours, and that of ball bearing is 50000 hours.

4. What kind of cooling fans can your company provide?

We can provide DC/AC brushless fans, which are mainly divided into three categories: axial flow fans, blowers (centrifugal fans) and cross flow fans (tangential fans).

5. What functions can the fan choose?

Optional functions: automatic restart, speed detection, shutdown alarm, waterproof (IP68 optional), PWM function, temperature control, etc.

6. How to select a DC fan?

To choose a DC fan, you should consider the following points: Fan size (mm), Fan speed (RPM), Fan airflow (CFM), Fan noise level (DBA), Fan starting voltage (V), Fan current (a ), Fan connector.

7.What is the lead time for customized cooling fan orders?

The lead time depends on the order quantity and customization complexity. For small-batch custom orders (less than 500 units), the lead time is usually 7–15 working days. For bulk orders (over 1,000 units) or highly customized designs (e.g., special voltage, waterproof structure), the lead time is 20–30 working days after the confirmation of design drawings.

8.Can you provide samples before mass production?

Yes, we offer free samples for standard cooling fans (customers only need to bear the shipping cost). For customized samples, we charge a reasonable sample fee, which can be fully refunded when the subsequent mass order reaches the agreed quantity.

9.What voltage ranges do your DC/AC cooling fans support?

Our DC cooling fans support common voltages including 5V, 12V, 24V, 48V, and can be customized to special voltages (e.g., 36V, 60V) based on your needs. AC cooling fans are available in 110V, 220V, 230V, 380V, suitable for different regional power supply standards.

10.What is the waterproof level of your cooling fans, and can it be customized?

Our standard waterproof cooling fans reach IP55, which can prevent dust accumulation and low-pressure water jet intrusion. For scenarios with higher waterproof requirements (e.g., outdoor equipment, humid environments), we can customize fans up to IP68 level, which supports long-term immersion in water within a specified depth.

11.How does the PWM function work in your cooling fans?

The PWM (Pulse Width Modulation) function allows you to adjust the fan speed dynamically by changing the duty cycle of the input signal (usually 0–100%). This helps achieve precise temperature control, reduce energy consumption, and lower operating noise when the equipment is under light load. Our PWM-enabled fans are compatible with most mainstream control systems.

12.Do your cooling fans come with certifications?

Yes, all our cooling fans and blowers have passed international certifications including CE, RoHS, UL, and CCC. These certifications ensure that our products meet the safety, environmental protection, and performance standards of markets in Europe, North America, Asia, and other regions.

13.What is the difference between axial flow fans, blowers (centrifugal fans), and cross flow fans?

Axial flow fans: Air flows parallel to the fan shaft, with large airflow and low noise, suitable for general ventilation and cooling (e.g., computer cases, power supplies).

Blowers (centrifugal fans): Air is sucked in axially and discharged radially, with high static pressure, ideal for scenarios requiring long-distance air delivery (e.g., industrial equipment, HVAC systems).

Cross flow fans: Air flows through the fan impeller along the cross-section, with uniform airflow distribution, widely used in air conditioners, refrigerators, and display cabinets.

14.How to maintain your cooling fans to extend their service life?

For daily maintenance, you can regularly remove dust from the fan blades and frame with a soft brush or compressed air (avoid high-pressure air to prevent blade damage). For fans used in dusty or humid environments, it is recommended to clean them every 3–6 months. Avoid disassembling the fan at will, as this may damage the bearing structure and affect the balance of the impeller.

15.Do you accept OEM/ODM orders for cooling fans?

Yes, we support both OEM and ODM services. For OEM orders, we can print your brand logo on the fan frame and package according to your requirements. For ODM orders, our R&D team will work with you to develop fans with unique specifications (e.g., special size, shape, or function) based on your equipment's cooling needs.

16.What is the minimum order quantity (MOQ) for your cooling fans?

The MOQ for standard cooling fans is 100 units per model. For customized fans, the MOQ is determined by the customization requirements-usually 500 units for simple customization (e.g., voltage adjustment) and 1,000 units for complex customization (e.g., new mold development).

17.How to solve the problem of fan noise exceeding the standard during use?

First, check whether the fan is installed firmly-loose installation will cause vibration and noise. If the installation is normal, the noise may be caused by dust accumulation or bearing wear. You can clean the fan first; if the noise persists, it is recommended to replace the fan with a new one of the same model. Our ball-bearing fans have lower noise and more stable operation compared to sleeve-bearing fans.

18.Can your cooling fans work normally in extreme temperature environments?Our cooling fans are designed to adapt to a wide temperature range. The standard operating temperature is -10°C to 60°C. For extreme environments (e.g., low-temperature areas or high-temperature industrial workshops), we can customize fans with special materials (e.g., high-temperature-resistant wires, low-temperature-resistant lubricants) to ensure normal operation in the range of -30°C to 80°C.

Shenzhen Tenkai Special Electromechanical Limited was established in 2012, specializing in the research and development, production and sales of special motors, special fans and special air pumps.

The company has 12 years of R&D and production experience; it has advanced testing equipment and sophisticated production equipment in the industry; it has a professional R&D team and production team.

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