SPARKEE!!!!! Listen, let me add a little SAFETY here for you. STOP using the silica sand from the orange box. First of all SILICOSIS is a huge health hazard. You should never sandblast with silica sand, I don't care how long some old timer has been doing it. It's bad news. Read the bag it comes in. Really inexpensive blast media is available at my local brick/concrete/rock yard in 60lb bags. I think it's called SharpShot. It is made from copper slag left over from the smelting process. This stuff works awesome! It is approved by OSHA for use without any respiratory precautions other than a dusk mask for "Nuisance" dust control. In laymans terms (and personal experience) you will have a bunch of black boogers if you don't use a dust mask. I did a ton of blasting and found that my leathers and a leather welding hood (soft) with a clear lens instead of a shade is perfect for blasting a lot of things out of position.
Ok, secondly, (I have the same blaster you have), it uses a lot of air and your compressor will run a lot. I have an 80gallon tank. What I have found causes the sand to stop flowing easily is condensation. You gotta dry that air before you plumb it into a sand tank. Vibrating wet sand doesn't really do much good. The best way to do it is really expensive. Which would be a commercial dryer. They use a series of refrigerated cooling, membranes, dessicants. But what I did was cheap. I took the 1/2inch air line coming off my compressor, ran it to a copper T fitting, 1/2inch X 3/8inch X 3/8inch, I sweated two 50ft copper coils onto each end of the T fitting, then put another T on the other end back to a 1/2inch line and into my Filter/Dryer. I took a plastic tub from wally world and put the copper coils in it. Cover it with about 24 inches of ice. Start blasting away. The cooled air will condensate, hit the filter/dryer and drip out the bottom. The dry air will hit your sand and keep flowing. Works like a freaking champ. I have used plain water and it works, but ice works better. Ok, so I have an ice machine that makes 500lbs a day....so it's easy for me to say use ice. Even water works better to cool than nothing at all!
But whatever you do. Stop using silica sand
Lincoln Power Mig 210MP MIG
Lincoln Power Mig 350MP - MIG and Push-Pull
Lincoln TIG 300-300
Lincoln Hobby-Weld 110v Thanks JLAMES
CK TIG TORCH, gas diffuser, pyrex cup
Thermal Dynamics Cutmaster 101
My brain