Adhering for the theory of 'quality, services, performance and growth', we have received trusts and praises from domestic and worldwide shopper for vent booster fan, EC Refrigerator Fan Motor, DC High Efficiency Centrifugal Fans. Our company follows the law of the market, constantly improve the business management and optimize the production process of products. Our company always adheres to customer-oriented, focus on high grade quality and better service, provide one-stop solution for you! Our mission is 'Provide Goods with Reliable Quality and Reasonable Prices'. We are committed to the cause of environmental protection and continuously improve the technology level in the field of environmental protection.
Production description
| The diameter of Impeller | 560mm | |
Material | Impeller | PA plastic 66, fibre glass-reinforced |
Rotor | Coated in black plastic | |
Direction of rotation | Clockwise, seen on rotor | |
Counter-Clockwise, seen on rotor | ||
Type of protection | IP44 or IP54 | |
Insulation class | Class B or Class F | |
Mounting position | Shaft horizontal or rotor on bottom; rotor on top on request(Any) | |
Condensate discharges | Rotor-side | |
Approvals | CE, CCC,UL and so on | |
Mode of operation | Continuous operation(S1) | |
Bearings | Maintenance- free ball bearings | |
Motor protection | Design with thermal overload protector | |
Cable exit | variable, lateral | |
Ambient temperature | -20℃ to 60℃ | |
Advantage | YWF series centrifugal fan with external motor has features of compact structure,convenient installation, credible running, little noise, energy saving and high efficiency. | |
Performance parameters
| Model | Voltage | Frequency | Current | Input Power | Speed | Max Air Flow | Capacitor | Noise |
YWFB4D560 | 400Y | 50 | 2.95 | 1800 | 1380 | 10250 | 85 | ① |
YWFB6D560 | 400Y | 50 | 1.4 | 620 | 920 | 7300 | 72 | ② |


Product feature and application
(1) Product feature:
●Compact structure
●Specialized design
●Refined process control
●Simple Installation
●High efficiency and low noise
●Long service life
(2)Application
●Condenser
●Evaporator
●Pipe fan
●Roof ventilator
●Heat dissipation and ventilation
Production details

The Research and Development Center
The Research and development center of Ningbo Lionball Ventilator Co., Ltd is a national R&D center. It is appraised as High-tech Enterprises and Engineering Technology Center and has obtained many important prizes in the provincial projects.
Research and development center currently has 25 staff members. We introduced Germanic technology and employed a well-paid fan expert as our technical adviser. What is more, we have cooperated with international renowned enterprise EMERSON for about 5 years and will hand in hand with Carrier China.
Research and development center are facilitated with modern equipment and advanced laboratories: Air flow laboratory and life testing laboratory. We provide each member with professional inspection equipment for better research environment.
Over the past two years, owing to continuous effort of R&D team, we have successively obtained 15 certificates of Utility Model patent and 2 certificates of Invention Patents.
(1)Our Certificates of Utility Model Patent




(2)Certificates of Invention Patent

Difference between forward centrifugal fan
(1)efficiency: the efficiency of the forward leaning centrifugal fan is lower than that of the backward leaning centrifugal fan.
(2)energy consumption: because the efficiency of the forward leaning centrifugal fan is low, its natural consumption for electric energy is greater than that of the backward leaning type.
(3)noise: when the forward leaning centrifugal fan is in operation, the noise emitted by the forward leaning centrifugal fan is larger than that of the backward leaning fan.
Our company always leads the trend with first-class quality, and makes unremitting efforts to build the first brand of Mv300/3m Single Phase 2 Poles Construction Concrete Vibrator Motor. Our corporate culture contains lofty ambition, strong will, down-to-earth action, and a high degree of condensation of personality. Our spirit of pursuing excellence reflects the enterprise requirements of maintaining innovation, continuous improvement, emphasizing efficiency and focusing on benefits.
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