Through years of unremitting efforts, our EC Efficient And Low Noise Centrifugal Ventilator, marine axial fan, duct fan silent has been praised among peers and users for its superior performance and enjoys a high reputation. We regard employees as the main force of enterprise development and we create conditions for the comprehensive development of employees. We have clear developing direction, pursuit of excellence, and the improvement of self, so that the enterprise continues to develop according to our long-term strategy. Our company establishes a long-term stable relationship with the world's leading express and logistics companies, offering fast and high quality services to as customers around the world. Our solid customer base has brought a strong impetus for future company growth.
Production description
Backward Centrifugal blowers are used primarily for intake suction and do not require a scroll housing. They have high hydraulic efficiency.
Backward centrifugal impellers offer a quiet and compact air moving solution. The Permanent Split Capacitor (PSC) motors provide reduced operating costs and longer service life. Ball bearing construction allows multiple mounting options. Backward centrifugal impellers have low profiles that do not require an enclosure. Air is discharged 360°radially from the impeller wheel. These units operate very efficiently at high pressures.
| The diameter of Impeller | 280mm | |
Material | Impeller | PA plastic 66, fibre glass-reinforced |
Rotor | Coated in black plastic | |
Direction of rotation | Clockwise, seen on rotor | |
Counter-Clockwise, seen on rotor | ||
Type of protection | IP44 or IP54 | |
Insulation class | Class B or Class F | |
Mounting position | Shaft horizontal or rotor on bottom; rotor on top on request(Any) | |
Condensate discharges | Rotor-side | |
Approvals | CE, CCC,UL and so on | |
Mode of operation | Continuous operation(S1) | |
Bearings | Maintenance- free ball bearings | |
Motor protection | Design with thermal overload protector | |
Cable exit | variable, lateral | |
Ambient temperature | -20℃ to 60℃ | |
Performance parameters
| Model | Voltage | Frequency | Current | Input Power | Speed | Max Air Flow | Capacitor | Noise | Curve |
YWFB2E280 | 230 | 50 | 0.85 | 190 | 2450 | 1900 | 5 | 67 | ① |
YWFB2E280H | 120 | 60 | 3.1 | 380 | 3100 | 2050 | 30 | 85 | ② |
YWFB4E280 | 230 | 50/60 | 0.36/0.46 | 78/102 | 1420/1630 | 1400/1600 | 3 | 62/67 | ③④ |
115 | 50/60 | 0.72/0.92 | 78/102 | 1420/1630 | 1400/1600 | 12 | 62/67 |


Product feature and application
(1) Product feature:
●Compact structure
●Specialized design
●Refined process control
●Simple Installation
●High efficiency and low noise
●Long service life
(2)Application
Exhausting industrial processes, roof and building ventilation, clean room and other sensitive HEPA filtering application, laboratory and research facility ventilation, air conditioner, heat exchangers, in-line duct blowers, range hood, fire place inserts, humidifiers, dehumidifiers, hand dryers
Production details

Company profile
NINGBO LIONBALL VENTILATOR CO.,LTD. was established in 1980. Lionball is one of the key Hi-Tech enterprises of the National Torch Program and a production enterprise combining development,manufacturing and sales together.And our products exported to the United States, Germany, Italy and other European and American countries as well as Brazil, Russia, other emerging industrial countries all around the world.Major partners include EMERSON(EMERSON), PANASONIC (PANASONIC) and other famous companies in the global 500 industry.The main products have been approved by VDE, UL, CE and ROHS and CCC.
As an enterprise with 40 years of operation history and continuous development and progress, Ningbo Lionball Ventilator Co., Ltd. has established a good cooperative relationship with the global producer and distributors. We believe that our high-quality products, good service and excellent corporate reputation will bring us a win-win situation.
Our Ec175 Backward Inclined Centrifugal Fan with Plastic Impeller is scientifically designed and reasonable, with favorable price, excellent quality and durability, and has been praised and appreciated by our customers for a long time, which is a good choice for them. Our company believes that effective use of existing technology to create products and services that customers desire is the true technical capability. Technology innovation is the first strategy we have always embraced, and it has been the cornerstone and energy source for our business development over the years.
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