Extraction setup- factory robots

[Hitch]

Anyone know about extraction, proper setups?

2 Robotic welding booths, need fume extracts..... customer proposes to go straight up and out.
They have 2 500mm axial fans which came with the booths.

Due to location and limited headroom, the duct needs to come out the roof of one of the booths, with a 90deg bend, across about 5metres, in 400mm ductwork, and into the vertical section out of the other booth.
Out of the top of the booth, they propose to have a tee for the other to connect, then the fan, then this silencer affair they also have... then about 1m to the roofline, then up another metre or so, then a chinaman hat on top.....


Few problems i envisage....

Draw from the second booth would be very poor....?

No filtration- can this sort of fume go straight into the air from an industrial premises?
I'd think it should have some form of filter in the booth end?

Height of the outlet above roof line?

Overall extraction, the booths measure about 4mx5mx3m....there is probably a set amount of air changes/hour required by H&S....?


Position of the silencer? Does that not need to be prior to the fan to keep noise down in the factory...?

 

[Shox Dr]

You'll need to fit a plenum, between the two booths to balance the flow rates


As for the silencer that depends on the "neighbours"

Filters I've been used to are cartridge type, 600x600 sq'ish (other sizes are available)

 

[rtbcomp]

You might need planning permission too, like a bodyshop near me did.

 

[Hitch]

You might need planning permission too, like a bodyshop near me did.

Good point, I put in a 6" went for them last year, no problems... but a gert 500mm job might be an issue, its got various vents already, but is close to the edge of a residential area, plus the ideal position would be almost at the ridge height.....

 

[Robotstar5]

I've never seen any filters on extraction for welding cells. I have seen a couple where fans have been clogged to the point of stalling due to oily residue build up, mainly from burnt pressing lubricant, so make fan accessible/removable.

 

[Hitch]

The fans are pretty skanky tbh, thats why i thought they ought to have a filter.

The plenum chamber, how would one work out the capacity of this? And where would the best location be?

 

[Welderpaul]

Filter deffo required. Soon get clogged with rubbish.
Had the Nederman rep out at the new place last week, he left me some drawings that might help, i'll have a root through on Monday.

 

[FranV8]

As an alternative to plenum, having dampers in the lines would allow thefflows to be balanced when commissioning the system.

As for H&S, if the system is there to protect personnel, then it'll be classedas an LEV (local exhaust ventilation) and come under those requirements. I can't remember the main points off the top of my head, but it'll likely involve annual flow testing at the extraction points.

 

[Shox Dr]

ey meant to say damper, fingers work faster than brain does at times