Our inline bathroom exhaust fan, EC Industrial Axial Fans, Single Inlet Forward Centrifugal Fan is available in a wide range of sizes and in accordance with international and domestic standards, and can be adapted to the requirements of different working conditions of our customers. We have established a more mature market-oriented operation mechanism by innovating our business model. We attach great importance to the introduction and development of talents, and gather strategic talents through training, absorption or introduction. Our goal is to realize the value of the company while bringing economic benefits to customers, and to achieve a win-win situation with customers. The needs of users are our work guidance. Honesty is the constant purpose of our company! Our company has been advocating the enterprise concept of 'sincere cooperation and common development'.
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.
Rely on 1st, devoting around the food stuff packaging and environmental safety for Low Noise Mini Small Bathroom Window Mounted Exhaust Fans. We have constantly responded to the situation, made new preparations, and accelerated product and industrial restructuring. We look forward to walking with you hand in hand with the enterprise spirit of 'realistic, dedicated, efficient, innovative, and forging ahead'.
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