With the increasingly fierce competition on a global scale, among many competitors that provide homogeneous products and services, we need continuous innovation to make our Compact Axial Fans, Axial Fan For Condensing Unit, Portable Axial Fan stand out. We have accumulated a wealth of product knowledge and industry resources, and we understand the principles of product structure and customer needs. We can supply high quality products with the very competitive price.
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

Under the influence of inherent organizational characteristics and value orientation, we guarantee the stability of the quality of the provided 1 1.8 2 Inch High Pressure Centrifugal Stand 4.5cm DC Fan Axial Fan. In the enterprise, we give full play to the binding force of the system, the edifying power of culture and the deterrent power of supervision to create a good environment. We have a forward-looking and professional design team, we use our enthusiasm and perseverance to serve the people who pursue quality.
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