--- title: "Permanent Magnet Servo Direct-Drive Industrial Fan" url: https://tiercooling.com/posts/permanent-magnet-servo-direct-drive-industrial-fan/ date: 2025-12-15 modified: 2026-09-28 lang: en author: "info@tiercooling.com" description: "Current location: Home Permanent Magnet Servo Direct-Drive Industrial Fan High airflow, low speed, and quiet operation improve your working environment. Covering an area of up to 1,450 ㎡ with power..." categories: - "News" image: https://tiercooling.com/wp-content/uploads/2026/09/news-837.jpg word_count: 1460 --- # Permanent Magnet Servo Direct-Drive Industrial Fan - [ Current location: Home ](https://rundongfang.com/) - ![rdf-hvls-fans-case-014](https://rundongfang.com/wp-content/uploads/rdf-hvls-fans-case-014-768x448.jpg) ![rdf-hvls-fans-case-015](https://rundongfang.com/wp-content/uploads/rdf-hvls-fans-case-015-768x448.jpg) ![rdf-hvls-fans-case-016](https://rundongfang.com/wp-content/uploads/rdf-hvls-fans-case-016-768x448.jpg) # Permanent Magnet Servo Direct-Drive Industrial Fan High airflow, low speed, and quiet operation improve your working environment. Covering an area of up to 1,450 ㎡ with power consumption of less than 1 kWh per hour, it instantly boosts productivity. Safe and energy-efficient, it delivers an ultimate refreshing and comfortable experience — it’s not just airflow, it’s cash flow. VFD start: Matched with a top-tier domestic variable frequency drive, low-speed operation features reduced vibration, shock-free variable frequency startup, smooth running, and near-silent performance. - Sealed motor: The enclosed motor has fewer monitoring points and failure points, greatly reducing maintenance workload and costs, with a long service life. - Aviation-grade materials: The blades are made of the same aviation-grade airfoil material, offering greater toughness, safety, and reliability. - Natural wind simulation: Streamlined fan blades, combined with aerodynamic principles, vigorously stir indoor air to generate simulated natural wind. - High efficiency and energy saving: Permanent magnet direct-drive motor + top-tier VFD, with an airflow of 15,197 m³/min and power consumption of only 1.3 kW per hour. 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Accidents occur at their lowest rate at around 20–24°C; when the temperature rises above 30°C or falls below 10°C, the accident rate increases significantly. ![](https://rundongfang.com/wp-content/uploads/products-info-001.jpg) Human comfort depends not only on temperature but also on other equally important factors such as air velocity, oxygen content, and humidity control. Together, these factors influence how comfortable the human body feels in an environment. 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Therefore, air velocity affects both human comfort and work efficiency. - Even in a relatively hot working environment, maintaining a steady flow of fresh air at a certain velocity can keep workers feeling comfortable and mitigate the various adverse effects caused by high temperatures. | Model | RDF-S3600 | RDF-S4200 | RDF-S4200 | RDF-B6200 | RDF-B6200 | RDF-B6700 | RDF-B6700 | RDF-H7200 | RDF-H7200 | | -------- | --------- | --------- | --------- | --------- | --------- | --------- | --------- | --------- | --------- | | Diameter | 3600mm | 4200mm | 5200mm | 6200mm | 6200mm | 6700mm | 6700mm | 7200mm | 7200mm | | | (12ft) | (14ft) | (17ft) | (20ft) | (20ft) | (22ft) | (22ft) | (24ft) | (24ft) | | Input Voltage/Frequency | Single-phase 220V/50HZ | Single-phase 220V/50HZ | Single-phase 220V/50HZ | Single-phase 220V/50HZ | Single-phase 380V/50HZ | Single-phase 220V/50HZ | Single-phase 380V/50HZ | Single-phase 220V/50HZ | Single-phase 380V/50HZ | | Rated current | 2.6A | 2.6A | 2.6A | 4.5A | 3.1A | 4.5A | 3.1A | 4.5A | 3.1A | | Power (kw) | 0.66kw | 0.66kw | 0.66kw | 1.3kw | 1.3kw | 1.3kw | 1.3kw | 1.3kw | 1.3kw | | Max Speed | 90RPM | 90RPM | | Max Airflow | 4552m³/min | 5306m³/min | 7065m³/min | 10747m³/min | 10747m³/min | 12560m³/min | 12560m³/min | 15197m³/min | 15197m³/min | | Noise Level | ﹤38d/B | ﹤38d/B | ﹤39d/B | ﹤39d/B | ﹤39d/B | ﹤39d/B | ﹤39d/B | ﹤39d/B | ﹤39d/B | | Weight | 72KG | 75KG | 78KG | 100KG | 100KG | 105KG | 105KG | 115KG | 115KG | | Coverage | ∅20-24m | ∅22-26m | ∅25-30m | ∅32-37m | ∅32-37m | ∅35-40m | ∅35-40m | ∅38-44m | ∅38-44m | ![](https://rundongfang.com/wp-content/uploads/hvls-fans-4.jpg) ### Three-Dimensional Natural Breeze Rundongfang industrial large fans work by stirring large volumes of indoor air to generate a Level 1–3 natural breeze effect, creating a soft, comfortable natural-wind-like feeling in high-ceiling spaces. 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[ Open Spaces ](javascript:void(0)) [ Enclosed Spaces ](javascript:void(0)) [ Multiple Fans Combined ](javascript:void(0)) [ Overcoming Obstacles ](javascript:void(0)) - ![Open Space](https://rundongfang.com/wp-content/uploads/hvls-fans-7.jpg) ![Enclosed Space](https://rundongfang.com/wp-content/uploads/hvls-fans-8.jpg) ![Multiple Fans Combined](https://rundongfang.com/wp-content/uploads/hvls-fans-5.jpg) ![Overcoming Obstacles](https://rundongfang.com/wp-content/uploads/hvls-fans-6.jpg) ![](https://rundongfang.com/wp-content/uploads/rdf-company-about-us-032.jpg) On-site installation service is available; - Free on-site survey with 1-on-1 customized solutions — truly zero cost, worry-free and reassuring; - The clear height of the building should be above 4 meters, and the spacing between load-bearing structural columns should be at least 20% greater than the diameter of the fan to be installed; - The roof structure should allow a load capacity of 150 kg or more; the total equipment weight of the fan is approximately 125 kg (including installation accessories and dynamic load), torque 300 n/m, noise below 39 dB; - Each fan effectively covers an area with a diameter of 30–40 m, and adjacent fans should be spaced 30–40 meters apart; - The optimal installation height is with the blades approximately 6–8 meters above the ground, and should not be less than 4 meters; - Ensure that the fan installation location is free from chandeliers or other obstructions; - The control box is best installed within 30 meters of the fan installation location; - Locations with prolonged heat sources or oil fumes are not suitable for installation. ![](https://rundongfang.com/wp-content/uploads/Installation-003.jpg)I-beam hoisting ![](https://rundongfang.com/wp-content/uploads/Installation-002.jpg)Steel frame hoisting ![](https://rundongfang.com/wp-content/uploads/Installation-004.jpg)Crossbeam hoisting ![](https://rundongfang.com/wp-content/uploads/Installation-001.jpg)Round pipe hoisting - **Commercial public places:** large shopping malls, supermarkets, specialty trade wholesale markets, convention and exhibition centers, exhibition halls, car 4S dealerships; - **Manufacturing:** industrial plants, production workshops, logistics warehouses, e-commerce operation warehouses, express parcel sorting centers; - **Leisure & Tourism:** Large amusement parks, public parks, tourist attractions, themed towns, dining, entertainment; - **Sports:** Cultural centers, gyms, indoor training venues. ![](https://rundongfang.com/wp-content/uploads/rdf-company-about-us-029.jpg) ![](https://rundongfang.com/wp-content/uploads/rdf-hvls-fans-case-016-1.jpg) - Improves air circulation in the space; - Comfort comes from the movement of air; - Provides a cooling sensation of 3–5 degrees; - Covers an area of 40–50 meters; - Creates a gentle, three-dimensional natural breeze of level 1–3, quiet and healthier. ![](https://rundongfang.com/wp-content/uploads/hvls-fans-13.jpg) ![](https://rundongfang.com/wp-content/uploads/hvls-fans-12.jpg)