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General Skidsteer & Technical Topics
Shop Talk
Home Made Sandblaster
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<blockquote data-quote="skidsteer.ca" data-source="post: 14401" data-attributes="member: 307"><p>More tanks help if you are starting and stopping, but what you always need to blast is MORE AIR. I think 75 to 100 cfm would be needed to run a 1/4" nozzle. And of course they wear out and get biggers which just makes it harder to keep the pressure up.</p><p>With a relatively small nozzle like you using I can get by with one 27 cfm 2 stage compressor (note that is actual rating at 175 psi, not at free flow or 0 psi) Pressure will fall below 90 when the nozzles begin to wear out. Twinning it with another 18 cfm 2 stage compressor will maintain @ 125 if I don't let the nozzle get too worn.</p><p>Of course you can start and stop, but unless you shut off the sand metering valve at the bottom of the pot, your hose fills with sand and that gets wasted when you start back up as there is no air flow in the hose until the sand clears. (you could shoot it into a pail)</p><p>Blasting a 16' TA car trailer is a all day job with a blaster this size. So by the time you add up your media and electric bill, wear and tear it does add up. But it sure is nice to see everything get all cleaned up.</p><p>Ken</p></blockquote><p></p>
[QUOTE="skidsteer.ca, post: 14401, member: 307"] More tanks help if you are starting and stopping, but what you always need to blast is MORE AIR. I think 75 to 100 cfm would be needed to run a 1/4” nozzle. And of course they wear out and get biggers which just makes it harder to keep the pressure up. With a relatively small nozzle like you using I can get by with one 27 cfm 2 stage compressor (note that is actual rating at 175 psi, not at free flow or 0 psi) Pressure will fall below 90 when the nozzles begin to wear out. Twinning it with another 18 cfm 2 stage compressor will maintain @ 125 if I don't let the nozzle get too worn. Of course you can start and stop, but unless you shut off the sand metering valve at the bottom of the pot, your hose fills with sand and that gets wasted when you start back up as there is no air flow in the hose until the sand clears. (you could shoot it into a pail) Blasting a 16' TA car trailer is a all day job with a blaster this size. So by the time you add up your media and electric bill, wear and tear it does add up. But it sure is nice to see everything get all cleaned up. Ken [/QUOTE]
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