Our organization has strived to establish a highly efficient and stable employees team and explored an effective high-quality command method for Axial Fan For Condensing Unit, 4 inch inline fan, axial fan for air?cleaner. Providing customers with efficient services is the yardstick of our work direction and value evaluation, because to satisfy customers is to achieve our goal. Our company constantly improve customer satisfaction, so as to improve the level of enterprise service. Hope to have the opportunity to cooperate with you. Our equipment will provide you with more efficient, safer and more stable services for your production and scientific research, and create higher value!
Production description
These units may be mounted in any orientation to provide maximum airflow in minimum areas.
(1)YWF External Rotor Centrifugal Fans are divided into forward centrifugal fan and backward centrifugal fan according to curved blades, which have compact structure, convenient installation, credible running, little noise, energy saving and high efficiency.
(2) Several speed ranks, adapt to both frequency conversion and voltage transformation speed changing active. Our products are widely used in duct fans, roof ventilator, air purifying equipment, air conditioning, and household appliances, etc.
(3)The voltage of the single phase motor is 220V, 50/60 Hz, and the voltage of three phase motors is 380V, 50/60Hz. We can also supply other fan motors with different voltages and frequencies according to clients' requirement.
(4)The safety grade of this series is IP54, and the insulation classes are class B and class F.
(5) The applicable ambient temperature of the fan motors used in condenser is from -30℃~60℃.
(6)The average service life of motors is over 30,000 hours.
(8) Our products have gotten UL approval, CE approval and CCC approval.
(9) Product Features
① —Material: Housing: galvanized sheet steel
Impeller: galvanized sheet steel
Rotor: Coated in black plastic
② Bearings: Maintenance- free ball bearings
③ Direction of rotation: Clockwise, seen on rotor
④All models have reached UL approval, CE approval and CCC approval
⑤The type of protection is IP54. All models are fitted with an internal Thermal Overload Protection Device
⑥ Mounting position: Shaft horizontal or rotor on bottom; rotor on top on request (Any)
⑦Insulation class is class B or class F
Performance parameters
| Model | V | Frequency | Current | Input Power | Speed | PA | Max Air Flow | Capacitor | Noise | Curve |
YWFF4E250 | 230 | 50 | 3.3 | 0.75 | 1300 | 0 | 2450 | 16 | 76 | ① |
YWFF4D250 | 230△/400Y | 50 | 3.0/1.7 | 0.8 | 1350 | 0 | 2600 | / | 76 | ② |
YWFF6E250 | 230 | 50 | 1.6 | 0.29 | 910 | 0 | 1700 | 5 | 65 | ③ |
YWFF6D250 | 230△/400Y | 50 | 0.75/1.3 | 0.27 | 900 | 0 | 1700 | / | 65 | ④ |



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
●Condenser
●Evaporator
●Pipe fan
●Roof ventilator
●Heat dissipation and ventilation
Illustration of Models
YWF—F—2—E—250
① ② ③ ④ ⑤
①YWF: External Rotor Centrifugal Fan
②F: Forward
B: Backward
D: Double Inlet
③(2,4,6):Pole of Motor
④E: Single Phase Capacitor Operation
D: Three Phases Asynchronous Operation
⑤250: The Diameter of inlet
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.
Lionball team





Our company strives to realise products diversification and differentiation, and to build the leading enterprise in the Multi-Size AC Forward Curved Single Inlet Centrifugal Fan industry. The trust and support of customers is the core driving force for our company to keep pioneering spirit and forge ahead in the face of various complex environments. Our company's technical professionals have a solid theoretical foundation, strong hands-on ability and experienced operation.
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