How to generate High-velocity-Air from Vacuum-Air?

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To generate high-velocity air from vacuum air in a 3" pipe, a minimum airflow of 50 CFM is required to pressurize air for filling a 6-foot blanket. The user suggests using an electronic blower but is concerned about the high costs associated with motors and impellers, aiming to keep expenses under $300. A vacuum cleaner is proposed as a potential solution that fits both the cost and flow rate criteria. However, it's emphasized that understanding the required pressure is crucial for selecting the appropriate blower. The discussion highlights the need for clarity on the specific application and requirements for effective airflow generation.
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I need to accelerate the vacuum-air entering into a 3" pipe. It should provide minimum of 50CFM air-flow.

Do you have any idea? Please it here!
 
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Welcome to PF!

CFM is a measure of volume per unit time, not velocity. Could you try to explain in more detail what you are trying to do please.
 
russ_watters said:
Welcome to PF!

CFM is a measure of volume per unit time, not velocity. Could you try to explain in more detail what you are trying to do please.

Actually, i need to pressurize the Free space air which will be used to fill-up a large length (6-feet) blanket with 55 CFM air value. So to convert the free space air into Forced-air (achieving 55CFM), i need a principle. I got one logic, by using Electronic-blower we can create pressurized air with 50CFM. But this logic gives more cost due to costlier Motor and impeller. So i need it with lower cost within 300$.
 
muthu.mari said:
Electronic-blower we can create pressurized air with 50CFM. But this logic gives more cost due to costlier Motor and impeller. So i need it with lower cost within 300$.

How about a vacuum cleaner? Cost and flow rate fits your description.

However, to select a blower you also need to know the pressure required.
 
Sucking and blowing just use different ends of the same device, so I still don't see the point of the question.
 
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