It is the key to shape our company's image to do a good job in the construction of enterprise ideology, and it is an important guarantee to improve the quality of shaded pole motor winding, dryer vent booster fan, EC Evaporator Fan Motor and services. Our company aims at the customers who can bring profit, not only focus on the market share. With excellent products, high quality service and sincere attitude of service, we ensure customer satisfaction and help customers create value for mutual benefit and create a win-win situation. We have not only skillful craftsmen in mechanical manufacturing, but also modern manufacturing methods, which are the strong guarantee for stable products. With scientific management methods and strong technical force, we will continue to deepen reforms, continuously improve the core competitiveness of the company, and adapt to the market.
Product Introduction
| The diameter of the fan blade | 350mm | |
Material | Guard Grill | steel, phosphated and coated in black plastic |
Wall ring | sheet steel, galvanized and coated in black plastic | |
blades | sheet steel | |
Rotor | encased in aluminium | |
Number of blades | 5 | |
Direction of rotation | Suction—direction of air flow "S" counter-clockwise, | |
Blowing—direction of air flow "B" clockwise seen on rotor | ||
Type of protection | IP54 or IP44 | |
Insulation class | Class B or Class F | |
Approvals | UL, CE, CCC , ROHS and so on | |
Mode of operation | Continuous operation(S1) | |
Bearings | Maintenance- free ball bearings | |
Ambient temperature | -30℃ to 60℃ | |
Motor protection | without TOP, TOP wired internally | |
Cable exit | lateral | |
Protection class | I | |
Advantage | YWF series axial fan with high static pressure and large air flow, have single phase, three phase, and different voltage levels, and 50HZ, 60HZ, according to the client’s different needs. | |
Product Parameter (specification)
(1)For Air Compressor:
YWF350 usually use in air compressor of 7.5KW
| Model | Voltage V | Frequency | Current | Input Power | Speed | Max Air Flow M³/H | Capacitor | Noise |
YWF4E350 | 220 | 50 | 0.7 | 150 | 1360 | 3000 | 4 | 64 |
YWF4D350 | 380 | 50 | 0.42 | 150 | 1350 | 3000 | / | 64 |
(2)For Refrigeration and others:
| Model | Voltage | Frequency | Current | Input Power | Speed | Max Air Flow | Capacitor | Noise | Curve |
YWF4E350 | 230 | 50/60 | 0.65/0.8 | 150/180 | 1350/1550 | 2700/3100 | 4 | 64/67 | ①② |
YWF4D350 | 400Y | 50/60 | 0.42/0.38 | 145/180 | 1350/1550 | 2700/3100 | / | 64/67 | |
YWF4E350-7P | 230 | 50/60 | 0.66/0.8 | 145/185 | 1350/1480 | 2680/2930 | 4 | 64/68 | ③④ |
YWF6E350 | 230 | 50/60 | 0.35/0.4 | 75/85 | 910/1060 | 1700/1950 | 3 | 55/58 | ⑤⑥ |
YWF6D350 | 400Y | 50/60 | 0.25/0.22 | 85/80 | 930/1050 | 1700/1950 | / | 55/58 |



Product feature and application
(1) Product feature:
Compact structure
Specialized design
Refined process control
Simple Installation
High efficiency and low noise
Long service life
Application
Ventilation | Buildings, parking lots and so on |
Refrigeration | Refrigerator, Air cooler, refrigerating machine and so on |
Heat dissipation | HAVC, Air compressor, Dehumidifier, Evaporator, Wall fan, Condenser, Dryer, AHU, Ice machine and so on |
Production details

Company profile
Founded in 1980, Ningbo lionball Ventilation Co., Ltd. is a key high-tech enterprise of the National Torch Program, which integrates product research and development, manufacturing and sales.Our company has passed ISO9001 quality management system certification and ISO14001 environmental management system certification.
"Lionball" brand after 40 years of precipitation, was awarded as a well-known trademark in Zhejiang Province.Our fan and motor products in the international industry has a high reputation and good reputation.Products are exported to the United States, Germany, Italy and other European and American countries as well as Brazil, Russia, other emerging industrial countries and other parts of the world.The main partners are Emerson, Panasonic and other world top 500 industry famous companies.The main products have passed the German VDE, the United States UL, Europe CE and RoHS and China CCC certification.
We believe that by putting people first, advancing with the times, and constantly innovating our Small Size Circle Low Noise Bathroom Closet Exhaust Fan, we can gain more customers. We are sincere and trustworthy, and set a corporate model. We believe that we should win with professionalism and quality. Our company is willing to work with customers and partners to build a professional and efficient industry environment and promote the progress of the industry.
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