We constantly optimize the industrial structure and improve the scientific and technological content of our axial fan for air?cleaner, 4 inch inline fan, Electronically Commutated Motor ECM, so that we can continue to develop and grow and won a good social reputation. With the rapid development of science and technology, the transformation and sublimation of aesthetic concepts, and the constant updating of media, our company has shown constant ecological vitality of innovation. Retaining talents, cultivating and enhancing employee loyalty are the key to the sound and rapid development of our company. Our company has a complete integrated service system. We are engaged in technological development and hope for a rapid expansion in the fierce competition of 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 always follow the tenet of customer-oriented, details-focused for Cast Iron Low Noise Axial Duct Exhaust Blower Ventilation Fan for Warehouse. Our company has always taken 'building a core team' as the focus of work, and now has an efficient executive management team. Since the establishment of the company, we have always worked hard to become a trustworthy and respected company.
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