Pressure Chambers Project: 30+ PSI for School

[GTdan]

Well, I'm putting this here because I don't know where else to put this topic. I want to do a project for school that requires me to make a system where there is a difference in pressure between 2 "chambers." Does anyone know where I can buy or get something that will put out over 30 psi (and something I could carry or push in a small cart)?

 

[rhuthwaite]

No one writes when I am on so you are going to wait a while for a reply

 

[brewnog]

A bike tyre pump will go to well over 30 psi.

What do you actually want to do with this project?

 

[GTdan]

Well I would need some kind of chamber to keep the air in, not just the pump. The chamber would need a valve or some area where the air would rush out when it's opened or when the pressure gets too great (so I don't think using the tire itself to hold the pressure would work exactly- though I could be wrong).

 

[Astronuc]

Some companies sell compressed air in appropriate tanks. Do not use pure oxygen since it can create a fire hazard if use near fire and fuel or other flammable materials.

 

[brewnog]

What do you actually want to do with this?

There are hundreds of applications using compressors to create pressure differences between two chambers, all doing very different jobs.

 

[GTdan]

I would like to shoot a ping pong ball VERY fast. Currently the way it's working is simply creating vacuum "inside" the pipe where the ball is. It works pretty well but I wanted to improve on it and make it go faster.

Do you think buying a tank of compressed air would be better? Could I fill it back up? Because if the project doesn't get the ball going as fast the first time around, I would like to try again without having to buy another one.