The company is strong, well-equipped, first-class quality, over the years with its strong technical strength, scientific management concept, advanced management mode, excellent team and sophisticated equipment to become the leader in the EC Refrigerator Fan Motor, Backward Centrifugal Fan For Hutch, Backward Curved Centrifugal Fan industry. We hope to build a relationship of mutual trust with our customers and suppliers and work hand in hand. Our company constantly improves the testing means and methods of products, and various advanced testing technologies have been applied, which greatly improves the quality and reliability of products. We implement a branded market strategy with the tenet of 'leading technology, pragmatic innovation, and thoughtful service'. And with a complete marketing system and reliable quality, our products have a very high market share, and they are also widely recognized by many users.
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.
Our Low Noise Exhaust Fan Axial Fan Blower Fan for Swine Farm do have good quality and excellent performance, and each of them is strictly inspected. We have always been adhering to the concept of 'pursuing excellence and sharing prosperity', so that every ideal person can realize his personal life value on the stage of the company. We hope to make our company a leader in the industry and make our due contribution to the economic development of our country.
Hot Tags: low noise exhaust fan, China, suppliers, manufacturers, factory, customized, wholesale, price, quotation, pricelist, for sale, energy efficient motors, DC Efficient And Low Noise Centrifugal Ventilator, shaded pole single phase induction motor, shaded pole motor parts, EC Centrifugal Fan For Duct Ventilating Equipment, Roof Mounted Axial Fan








