Our company will continue to create high quality Industrial Roof Exhaust Fan, shaded pole single phase induction motor, Roof Mounted Axial Fan by adhering to the spirit of being sincere, better and newer, giving full play to our professional advantages. We insist on the standard requirements of the international certification system as the basic guarantee of our own quality. In the whole process of service, we always take customer satisfaction as the goal pursuit, pay attention to detail innovation, and pursue the service realm beyond customer satisfaction. We continue to improve the degree of organization and expand the scale and scope of production and operation.
Production description
YWF series centrifugal fan with external motor has features of compact structure,convenient installation, credible running, little noise, energy saving and high efficiency.
Our product YWFF310 has several speed ranks, adapt to both frequency conversion and voltage transformation speed changing active.
Our products are widely used in refrigeration and ventilation fields, such as condenser’ evaporator, duct fans, ceiling fans.
Voltage and frequency: Single phase motor is 115/220V, 50/60HZ, three phase motor is 380V, 50/60HZ. We can also supply other fan motors with different voltages and frequencies according to clients’ requirement.
The average service life of motors is more than 17500 hours.
| The diameter of Impeller | 310mm | |
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 |
YWFB4E310 | 230 | 50 | 0.46 | 103 | 1360 | 1715 | 4 | 63 | ① |
YWFB4E310L | 115 | 60 | 1.51 | 172 | 1650 | 2090 | 16 | 63 | ② |
YWFB4E310H | 230 | 50/60 | 0.47/0.51 | 99/117 | 1340/1530 | 1465/1680 | 3 | 62/66 | ③④ |
230 | 50 | 0.4 | 92 | 1270 | 1700 | 3 | 62 | ⑤ | |
YWFB4D310 | 400Y | 50 | 0.3 | 100 | 1420 | 1740 | / | 64 | ⑥ |


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
Production details

FAQ
(1)Q: Are you a manufacture factory?
A: Yes,we are one of the leading manufacturers of fans and motors in China since 1980, Our factory occupied area of 26000square meters, located in Yinzhou district, Ningbo. We have more than 300 employees.
(2)Q: Which product certification do you have?
A: Our products are approved VDE certificate, UL certificate, CE certificate, ROHS certificate, CCC certificate, SASO certificate and so on.
(3)Q: How about our company's quality control system??
A: We have gotten IS09001:2008 certificate(SGS)
(4)Q: How long is the warranty of your products
A:One year after ETD
(5)Q:What kind of trade terms and payment terms?
A: Trade terms: EXW, FOB
B: Payment terms: T/T, L/C
Deliver and serving
(1)Deliver
About 30-40 days after receive client’s payment. Because we are manufacturer, and we don’t have production in stock. We will arrange production as soon as possible.
(2)Service
①Pre-sales services:
We have Personalized Customization Scheme for every client.
We will adjust the voltage, frequency, length of line and other detail character according to client’s demand.
②After-sales services
According to the requirements of consumers, carry out the technical guidance on the use and other aspects
Dealing with customers' letters, visits and telephone complaints, answering customers' inquiries. At the same time, we will use various ways to collect the opinions of consumers on the quality of products, and improve them in time according to the situation.
warranty: one year after ETD.
We continue to enhance our ability in scientific research and technological development, and intensify the development, introduction and promotion of new technologies and Biomass Hard Wood Pellet Press. We use a full range of integrated solutions to effectively reduce the overall cost of customers, thereby creating higher value for customers. With more than ten years, our company have been adhering to the 'integrity management, quality first'business philosophy, and has grown in the fierce competitive market.
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