Blast cabinet extraction again....

[rcx132]

I know we've spoken about this before, but more questions.

I had one of these, it worked great, took no space and had some nice features, e.g. it filtered the dust before it went anywhere near the motor, and it had a trap that let you recover some of the accidentally swallowed abrasive. But it's cheaply made, and didn't last long. Got money back.

Next I tried a vacuum cleaner. Worked fine with JBlast but since switching to dustier Alu Oxide it just doesn't cope.

Google says most people are using a snail shaped extractor like this:

Takes up way more space, but at least with Machine Mart you get a better warranty. But are these designed for extracting abrasive dust? Is the motor sealed well enough to stop the abrasive chewing up the internals?

How do I attach to the blast cabinet? I don't think it came with any flange.

I know Clarke stuff is still Far Eastern made but at least it's got a warranty and comebacks under consumer acts (states goods need to last reasonable time upto 5 or 6 years).

The Clarke stuff is usually over priced though, e.g. they sell the same 24 l compressors as SGS, but at almost double the price. Going to see if I can find a cheaper brand that's using the same gear rebranded.

 

[rtbcomp]

The motor is away from the extracted dust, it has its own cooling fan which will suck in atmospheric dust, but the motor itself is sealed, the air just goes round the outside of the motor.

I used toilet and clay/pvc connectors to connect the unit to plastic soil pipe, then waste pipe adaptors & vacuum cleaner hose to go to my cabinet. Gaffer tape is useful too.

Use the same connectors & soil pipe to carry the exhaust out of the building.

The bag restricts the flow, I've added extra bags to mine.

I also removed the on/off button and fitted a normal switch as the unit is installed beneath my bench and difficult to get to.

I fitted screwed inspection ports to the bottom of the bags to make them easier to empty

http://www.mig-welding.co.uk/forum/media/albums/blast-room.301/

 

[Fazerruss]

Where did you get your extra bags from?

 

[rtbcomp]

^^ It was a firm in Bradford, can't recall their name or find them on Google. Try Googling "Technical fabrics", "Filter Bags", "Filter cloth" &c&c. You could try Clarke spares.

 

[Fazerruss]

Thanks I'll have a look. Mine is a Rexon extractor and it works well but I'm thinking of making a cyclone system for it..

 

[brightspark]

Thanks I'll have a look. Mine is a Rexon extractor and it works well but I'm thinking of making a cyclone system for it..

View attachment 111609

isd the bag on the Clarke one big enough for yours

 

[rcx132]

So decided to go for one of these. I know it's Silverline, but they give a 3 year warranty and to be honest, looks like it comes from the same factory as the dearer brands. It's bulky but I think I can fix it in the roof truss so it's not taking floor real estate.

Just a thought. Do I need the bags on it? It's just removing dust mist from a small blast cabinet, I don't see an issue with it venting outside. Or could I fit a K&N style filter inside the cabinet, on the cabinet flange, so that the air is filtered before it even leaves the cabinet? Advantage there is that when the extractor switches off the media would drop off the filter back into the cabinet.

 

[brightspark]

I just use the woodchip extracta similar to that and vent outside with 4inch flexible ducting don't bother with any filters apart from a mesh high up in the cabinet that stops the extracta sucking out the media . decent media just falls back in the cabinet in use and extracta just sucks out the dust . il take a picture of it for u

 

[rcx132]

I just use the woodchip extracta similar to that and vent outside with 4inch flexible ducting don't bother with any filters apart from a mesh high up in the cabinet that stops the extracta sucking out the media . decent media just falls back in the cabinet in use and extracta just sucks out the dust . il take a picture of it for u

I like that idea. Mesh stops loss of media, and it can vent into the trackway next to the house.

 

[brightspark]

here's my outlet its a4inch outlet with a gas bottle base screwed to the case with fine wire mesh fitted. with the size it doesn't clog up or lets just the dust through .

 

[rcx132]

This is the used extractor I was hoping for, but the used prices just don't add up. £75, plus petrol, plus half hour travel each way, it costs almost same price as new (£140 I paid) but no warranty. I think a lot of the time buying used only works if you buy local and off ebay. Prices on ebay just getting too high. The deals seem to be on Facebook Groups now.

 

[brightspark]

did u get a new one u can pick a decent one up for 188 quid . I fit one at the school I work at. I think it was a Charnwood

 

[rcx132]

I got the Silverline one for £140, should arrive tomorrow so I can get on with blasting. They all look the same to me and it has a 3 yr warranty.

 

[balmerchris]

I got the Silverline one for £140, should arrive tomorrow so I can get on with blasting. They all look the same to me and it has a 3 yr warranty.

Where did you order it from? that's a good price.

 

[rcx132]

Where did you order it from? that's a good price.

http://www.thetoolacademy.com/silverline-425822-silverstorm-750w-dust-extractor-43914-p.asp