Advice on buying shot blasting equipment

[Dirk Pitt]

I am out of my depth and am after some advice please.
I would like to buy a shot basting cabinet and compressor for DIY use. Looking at the Sealey web site

http://www.sealey.co.uk/PLPageBuild...8&analysiscode=&requiredresults=16&fulltext=1

what compressor do I need to run any of the SB970, 922 or 973 blast cabinets.

Sealey said 10cf SAC2203B for the SB970 and 30cm SAC62710B for the sb972 and 973 which looking at the instructions part of which I have copied below seems awfully high

SB970
3.1. Air supply


3.1.1. You will require an air pressure of 60-90psi, and an air flow of 5cfm to operate the unit efficiently.
3.1.2.  WARNING! Ensure air supply is clean, dry and does not exceed 80psi

SB972

3.1.1 You will require an air pressure of 80psi, and an air volume of at least 5cfm to operate the unit efficiently.

3.1.2  WARNIN G! Ensure air supply is clean, dry and does not exceed 100psi

SB973

3.2.1 You will require an air pressure of 90psi, and an air volume of 15cfm max for operating the unit.

 WARNING! Ensure air supply does not exceed 90psi


your advice appreciated
thank you
Dirk Pitt

MOD - Fixed link

 

[Chris Stevens]

You can operate a blast cabinet for short periods of time with a 3hp single phase compressor, and if you are ok with spending quite a time to blast relatively small parts, would be fine.

 

[rtbcomp]

Welcome to the forum.

Those cabinets use syphon guns, which do use quite a lot of air.

Search this section, there's oodles of discussions about this subject.

 

[rtbcomp]

It depends what your blasting, some paint will come off with compressed air alone, I've been tempted to use dynamite on others!

 

[Dirk Pitt]

thanks for the advice. would this compressor do
Clarke SE16C200 Industrial Air Compressor http://www.clarkeinternational.com/.../professionalindustrial-air-compressors-elect


I think I'm asking for you to tell me what I could get away with and what I should get in the way of a compressor. A bit like chris's reply. I don't want to be having to frequently wait for the compressor to refill while I'm blasting but nor do I want something to big that once the cylinder is full I can blast for an hour without it refilling. Perhaps frequently is a bit weak, perhaps continuously wait but then I have no experience. Should I expect the compressor to run all the time I'm blasting? should the compressor be able to keep up with me blasting even if that means it has to run to keep up.

thanks
dirk pitt

 

[rtbcomp]

thanks for the advice. would this compressor do
Clarke SE16C200 Industrial Air Compressor http://www.clarkeinternational.com/.../professionalindustrial-air-compressors-elect


I think I'm asking for you to tell me what I could get away with and what I should get in the way of a compressor. A bit like chris's reply. I don't want to be having to frequently wait for the compressor to refill while I'm blasting but nor do I want something to big that once the cylinder is full I can blast for an hour without it refilling. Perhaps frequently is a bit weak, perhaps continuously wait but then I have no experience. Should I expect the compressor to run all the time I'm blasting? should the compressor be able to keep up with me blasting even if that means it has to run to keep up.

thanks
dirk pitt

That's what I use and it's a good compressor, one advantage of using a syphon gun is that you tend to use it in bursts, which makes it easier for the compressor to keep up.

 

[brightspark]

-what is the size of the parts and what are they .your -limited with a suction gun

 

[brightspark]

i use presure pot-in mine as well as suction gun. it will take a car wheel with tire on . anything larger i can -do --outside with an air fed blasting helmet on--and a larger pot and -- comp

 

[Chris Stevens]

thanks for the advice. would this compressor do
Clarke SE16C200 Industrial Air Compressor http://www.clarkeinternational.com/.../professionalindustrial-air-compressors-elect


I think I'm asking for you to tell me what I could get away with and what I should get in the way of a compressor. A bit like chris's reply. I don't want to be having to frequently wait for the compressor to refill while I'm blasting but nor do I want something to big that once the cylinder is full I can blast for an hour without it refilling. Perhaps frequently is a bit weak, perhaps continuously wait but then I have no experience. Should I expect the compressor to run all the time I'm blasting? should the compressor be able to keep up with me blasting even if that means it has to run to keep up.

thanks
dirk pitt

I have a 3hp, 10cfm, 200ltr, 240v, compressor, and used to have a small Machine Mart blast cabinet. It would work for maybe a minute without compressor cutting in. Got rid of cabinet as it was really pretty much a waste of time, and took a very long time to do even small parts. If you want to blast continuously with a single phase compressor, you will find pressure drops pretty quickly, so you would need either a very small nozzle on the blast gun, or compressor with x2 pumps with 3hp motors. If you have a pressure washer dependent on what you want to clean you might be able to wet blast using the pressure washer to siphon feed sand.