the point is when the sand in the trap gets wet you are done with a siphon pot. now with the wet sand it works great right. good luck getting the dry sand to form and stick together. have you ever tried to build a sand castle at the beach above the wave line. super dry air is the ticket right? without the proper moisture condensers and filters inline, depending on the size of your compressor system you will be pumping more or less hot wet air into the air/sand mixer on the bottom of the sand reservoir. to put it in perspective think of your plasma cutter. now for a problem that most guys overlook when buying a blaster is the biggest thing you will fight more so in Virginia than in Calif. if i turn it down low enough i can ice up the face plate on a 100 degree day. i have complete air feed hood system with air conditioner system which is literally really cool for these hot California days. both i power off a 175 cfm IR rotary screw compressor.
i have a little 100# pressure pot i use for small jobs and a 700# pressure pot that i use for larger jobs.
sand blasting any thing close to what you are wanting requires large amount of air. I'd like to hear a recommendation from folks who use sandblastersgood luck with either one. The compressor is a 60gal 3.5hp 220V that delivers something like 11cfm at 90psi. I will be using it for weekend projects and to maintain some logging and farm equipment. I am getting ready to buy a sand blaster but I am not sure whether to bother with the pressure pot style or just get a simple siphon kit (like the $23 one from Northern Tool).
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