We always get the job done to be a tangible staff to ensure that we can easily offer you the best high-quality and the greatest value for Unit Bearing Motors, high pressure centrifugal blower, AC Centrifugal Fan. Our company has long-term friendly cooperation with large enterprises at home and abroad, and has the right of self import and export. We are committed to the growth of our people and the well-being of our employees through the realization of good value. To achieve your expectations and create your profits is always our mission. We will, as always, adhere to the service-centric business tenet, adhere to and improve the model of training before sales.
Product Introduction
| The diameter of the fan blade | 550mm | |
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:
YWF550 usually use in air compressor of 22-30 KW
| Model | Voltage | Frequency | Current | Input Power | Speed | Max Air Flow | Capacitor | Noise |
YWF4D550 | 380 | 50 | 1.35 | 600 | 1300 | 9700 | / | 76 |
(2)For Refrigeration and others:
| Model | Voltage | Frequency | Current | Input Power | Speed | Max Air Flow | Capacitor | Noise dB(A) | Model |
YWF4E550 | 230 | 50/60 | 2.2/3.1 | 500/710 | 1320/1500 | 8250/8700 | 16 | 76/80 | ①② |
YWF4D550 | 400Y | 50/60 | 1.1/1.3 | 480/700 | 1320/1500 | 8250/8700 | / | 76/80 | |
YWF6E550 | 230 | 50/60 | 1.15/1.55 | 230/335 | 940/1100 | 5400/6400 | 10 | 66/71 | ③④ |
YWF6D550 | 400Y | 50/60 | 1.1/0.92 | 290/345 | 940/1100 | 5400/6400 | / | 66/71 |


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

The Research and Development Center
The Research and development center of Ningbo Lionball Ventilator Co., Ltd is a national R&D center. It is appraised as High-tech Enterprises and EngineeringTechnologyCenter and has obtained many important prizes in the provincial projects.
Research and development center currently has 25 staff members. We introduced Germanic technology and employed a well-paid fan expert as our technical adviser. What is more, we have cooperated with international renowned enterprise EMERSON for about 5 years and will hand in hand with Carrier China.
Research and development center are facilitated with modern equipment and advanced laboratories: Air flow laboratory and life testing laboratory. We provide each member with professional inspection equipment for better research environment.
Over the past two years, owing to continuous effort of R&D team, we have successively obtained 15 certificates of Utility Model patent and 2 certificates of Invention Patents.
(1)Our Certificates of Utility Model Patent




(2)Certificates of Invention Patent

We will continue to introduce more advanced technology to continuously optimize our IP67 Waterproof Axial Flow Fan High Pressure CPU Cooler DC Fans, so as to make more customers favor it. hrough continuous accumulation and exercise,we have been able to accurately grasp the pulse of the market, and closely focus on the market and consumer needs, continuously follow up the market and launch new products. We strive to demonstrate our value in the process of creating value for customers, enterprises and society.
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