We aim to shorten the manufacturing and development cycle and reduce the development cost of Forward Curved Centrifugal Fan, inline duct fan, Roof Mounted Axial Fan. At present, the ability to innovate has become the focus of attention of countries, enterprises and even individuals, and is a decisive factor for a country's international competitiveness and an enterprise's core competitive advantage. We improve brand awareness, form strategic alliances, conduct joint marketing and improve product research and development capabilities. We are making efforts to innovate talent cultivation mechanism, hoping to realize the transformation from traditional personnel management to human resource management and human capital management.
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 promise to maintain the high quality of our Low Noise Air Suction Tube Type Ceiling Exhaust Fan of ABS Material from beginning to end, and continue to introduce new ones to create higher value for customers. Relying on modern management, advanced high-tech equipment, superior quality, excellent service, fair price and accurate delivery date, as well as superior information channels and good business capabilities, it has established a near-good reputation among customers. We have gained a good image, won the recognition of our customers, and established long-term and stable contractual relationships with many domestic enterprises. In the specific work, we always request each employee to be strict and serious, pay attention to details, and do well to the extreme for innovation.
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