Sandblasting.

I wonder if anyone can tell me how a pressurized sandblasting equipment is working.

You see, I have a pressure tank, and wish I knew how to convert it to a pressurized sand tank.

Maybe some out there know about a scetch or something showing how it is made inside the tank.

Thanks a lot in advance,

Bill Brox, northern part of Norway

Air pressure goes in the top of the tank, sand in the middle, valved outlet at the bottom where the pressurized sand mixes with the air flow in a tee. You need a way to fill the tank that seals the air pressure inside. Using it, you have air coming through the tee and gradually open the sand valve to adjust how fast you want the sand. I guess you know about testing your tank? You don't want to miss the solstice this year!

You say Mo,,, if you mean Mo i Rana, I am about 400 miles north of it. Between Narvik and Troms�
Wonderful temperatures in the summer.. <<>>

Anyway, thanks for the reply. You see, some says there is some stuff inside the tank in the outlet. The reason for this should be that the sand tends to stop in the outlet. The man I talked to meant there was some device to stir up the sand to get it out better.

Yes, I know I need to test the tank. It is no problem. It is an air tank from a truck. I will weld on a piece of pipe in the end of it with treads inside, so I can fill it with sand and then use a plug to seal it.

You talk about a valve, do I put it between the tank and the Tee ?

Does the Tee have some sort of pipe inside it to build up vacuum to drag the sand out of the tank ?

Hm... this was many questions... sorry.

Bill

The only time I had a stoppage was when I forgot to close the sand valve before shutting off the air supply. My tee has no venturi. The sand is pushed by the compressed air above it. The line from your compressor tees to the bottom tee and also to the top of the tank. Air valves to shut off air to the tank and the bottom tee and an air filter are the only other parts. I would assume that more expensive tanks have other features, but I've had no problems. Be prepared to use a lot of the ceramic nozzles. They don't last very long before the hole is enlarged so much you lose power.