The quality of our Centrifugal Fan For Air Filtration Equipment, 4 inch exhaust fan, Centrifugal Direct Drive Fan is reliable, the price is favorable, the quality is excellent, durable, long by the majority of customers praise and praise, is the first choice of customers to choose similar products. We aim for quality growth, provide efficient value-added services to our partners and customers, and bring satisfactory returns to our shareholders. Over recent years, our company has expanded continuously, enhanced our comprehensive strength and improved its capability in service and quality. A high quality team with superb execution is a strong guarantee for our company's continuous and steady development. Our price is reasonable, batch automatic production, greatly reducing labor costs.
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 have an in-depth understanding of the needs and expectations of our customers, so that our Toyon DC AC Td/Te17251-S1 High Pressure 1238 120*120*38mm Electric Air Movement Axial Cooling Fan 5000rpm Ventilation Fan Exhaust Cooling Fan can be widely loved by customers. We encourage every employee to compete on the basis of sincere cooperation and commitment of responsibility. Because of the high quality and competitive price of our products, we will be the market leader. For more information, please feel free to contact us.
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