by Randy Murphy
(Piqua Ohio, USA)
I purchased a Snap-On Pressurized sand blaster, Model Y441 pressurized tank @ 80 psi.
It has a 1 inch delivery hose coming out of the tank. I have hooked up the supply line, which is .5 inch copper feed line, with a .5 inch hose.
Snap-On rep. said this unit should blow paint off down to metal with no problem. It take me two minutes to get a 1 square ft. area and lots of media. Please help suggest a fix.
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Hello Randy. From your post I understand that you feel that the Snap-On Pressurized sand blaster may be being under-powered by the .5 inch copper supply line versus the 1.0 inch delivery hose?
Am I correct in understanding that the 1.0 inch hose is the media delivery to the blast nozzle, or is that the compressed air supply to the blaster?
Randy, I don’t do much blasting, so I don’t know if 2 minutes to get 144 sq/inches of metal back down to clean profile is fast or slow.
I do believe that somewhere in the specs for the sandblast unit it should tell you what the compressed air feed flow rate for that blast gun, at 80 PSI is. That’s the info that will tell you whether you have enough flow or not.
What’s that spec, please? If you can’t find it, ask the rep.
The PRESSURE DROP page on this site has a chart to give you some idea of the flow through various sized orifices if that helps.
Anyone else?
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Randy. I have the same snap on sandblaster. These blasters go a great job. It takes a large air compressor to keep up with these blasters. Your lower valve adjust your media volume so when you start you need to set that valve at a partially open and tune it in to your desired media based on what you are blasting. I run mine at 90 psi and it does great and depending on the metal and layer of paint and rust two minutes could be about right but shouldn’t use that much media. Mine will run about thirty to… Read more »