Qifang 70x70x15mm 70mm large air volume dc propeller blower cooling fan

 Qifang Electric Co.,Ltd is a professional industrial fans manufacture, and our products cover:cooling fan,DC fan,AC fan,blower,Radiation fan,DC Brush fan etc

 if any inquiry in fans, you are welcome to contact us directly, factory direct sales& competitive price can save you cost by 2% or 3% than other suppliers.

 Q1:Are you a factory or trading company?
A:We are a factory with 22 years' experience.

Q2:What are the products of our factory ?
A: The products are Dc cooling fans , Ac cooling fans, Blower cooling fans, Cpu cooling fan, VGA cooling fan.Our fans from 40mm-220mm . We can also do cooling fans as customers' requirement.We are honored to offer you samples.

Q3:What characteristics determine the lifetime of the fan?
A:In a well designed fan, the lifetime of the ball bearing is the limiting factor in the lifetime of the fan. Bearing life is related to the size of the bearing, the speed of the fan, the load of the fan, the grease used, and other factors.

Q4: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 aimed at identifying any latent manufacturing problems and determining the effectiveness of burn-in. Every day, 5 samples will be picked up randomly from one of the production lines for burn in at 50°C+/-5°C for 24 hours.
*On-going Reliability Demonstration
This is a longer-term program aimed at providing data on continuous basis to demonstrate the reliability of product. 10 units per month are randomly 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.

Q5:What is the divery time
Sample lead time:3-5 days
Mass production Delivery lead time: 1 -3 weeks(Depend on the quantity)
Delivery Ways: DHL ,UPS Door to Door service ,By Air ,By Sea ,etc.

Q6:What can I do if we can not find the suitable fan model in the fan list?
Please contact us for customized fans.
* If you want another rpm or voltage or other reqirement,pls contact me for more details,thanks!
* For Special Cooling Fan,Such as: moistureproof, waterprrof, turbocharger, soft start, Reversible, temperature control, PWM speed control, the RD alarm and the FG signal etc,pls contact me freely.

Q7:How does your factory do regarding quality control?
A:"Quality is priority. Quality control people always attach great importance to quality controlling from the very beginning to the very end. Our factory has gained CE, RoSH, CCCcertification.