Shenzhen Topfan Technology Development Co., Ltd. is a professional fan design and processing enterprises. founded in 1996 in Shenzhen China, It's a manufacturer on AC fan and DC brushless fans. Products support  OEM, ODM and passed CE RoHS UL TUV certificated and good sellers both at home and abroad, the products mainly includs axial fans, cross flow fans (tangential fan), blower fans (centrifugal), being widely used in the information technology, network communications as well as industrial equipment, medical equipment, home appliances and others.
Factory:

Workshop:

QC testing department:

Certification:

Packaging & Shipping:
You can choose the shipping way by yourself .

You can choose the freight forward company by yourself .

We can arrang the shipment according to your require .

If you have any requirements you could contact me soon .

 1.Samples delivery time is 7 working days . ( The quantity of free samples among 2 - 3 pcs . )

2 . Fans quantity : 1K ~ 5K ,the delivery time is 7 ~ 10 working days ;

Fans quantity : over 5K , the delivery time is 15 - 20working days

3 . International express : UPS / DHL / FEDEX and so on .

More questions:

1 . What is a DC Axial Fan ?

An DC fan is usually powered by 3v , 5v , 12v , 24v , 36v and 48v . It blows air along the axis of the fan , or parallel to the track of the blade axis .

 Standard DC Axial fan sizes include 20mm , 30mm , 40mm , 50mm , 60mm , 70mm , 80mm , 92mm , 120mm , 150mm , and 200mm .

 2 . How to choose a DC fan ?

To choose a DC fan ,  you should consider the points below

√  fan voltage

√ fan current

√ fan speed

√ fan airflow

√ fan noise

√ fan lifespan

 3.What is a bearing ?

Bearing includes Sleeve Bearing and Ball Bearing , life expectancy of sleeve bearing fan is 30000hours , while ball bearing is 50000hours or more

 4 . How do we carry out quality control ?

Usually , there are two ways to monitor reliability during the manufacturing process .

⇒ Early Life Test

This is used as a mean of process control determined at identify any latent manufacturing problems and determining the effectiveness of burn - in .  Every day , 5 samples will be picked up from one of the production lines for burn at at 50 ° C + /  -   5 ° C for 24 hours .

⇒ On - going Reliability Demonstration

This is a longer - term program at at providing data on continuous basis to demonstrate the reliability of product . 10 units per month are diverse collected from one of the production lines for burn - in for 168 hours at 50 ° C + / -  5 ° C . Units are monitored and tested on daily basis . Failed units will be analyzed and corrective actions taken where necessary .