Building/Designing a spray booth

[Paint munky]

Ok a little late but after some discusions with the consultant off ebay this is what ive come up with, just basic drawings so far but your get the idea.

My shed measures 8x15ft which will sectioned in 2 halfs as shown, area A will be heated in some way which will provide warm filtered air from the top of the wall. The idea behind this was to give a diagonal airflow across the room to the 2 stage filtered extraction panel which will sit 0.5M from the floor as i will be painting on stands which are roughly 1.0M high.
The 2 stage filtered panel needs to sit roughly 400mm from the wall to allow air to congregate before passing through the fan, which can draw from anywhere behind the filters. It will house two stages of filter, comprising of a 100mm green/white Painstop primary, backed up by a 290gsm blue/white secondary.

Exraction fan recomended is a 500mm diameter, 1.1kW bifurcated axial flow fan. Price is £600.00 + V.A.T. for 3 phase or £650.00 + V.A.T. for single phase. Provided the fan is mounted outside the spray room there is no need for a flameproof unit.

Opinions????

 

[marc76]

What is the filter? Because filters made like an air filter of a car, flows much more than perforated tube filled with charcoal (which is what I have). Since I knew that, I spend more money on the blower and it works great. Hope this helps.

 

[Paint munky]

What is the filter? Because filters made like an air filter of a car, flows much more than perforated tube filled with charcoal (which is what I have). Since I knew that, I spend more money on the blower and it works great. Hope this helps.

Not sure i understand that, could you provide a diagram of your setup? or anyone else for that matter. Im open to ideas to get this done ASAP, ive got 4 bikes waiting for paint now! Ok i doubt im going to use them over the winter but i'll be nice to get started on them.

 

[marc76]

Done. I will post it tomorrow.

 

[the snooper]

as for your filters look here it will give you an idea of what is used

before you go and waste your time you are never gonna heat the booth while you have the extraction fan on.
you can pre heat the area for a while before painting by using a couple of fan heaters built in and filtered obviously on the intake side of the heaters
once you have painted and the overspray has cleared you can then switch of the extraction and turn on the heat for a while
the main thing is to get rid of the overspray heating isnt such an issue as you can use faster activators

 

[marc76]

Not sure i understand that, could you provide a diagram of your setup? or anyone else for that matter. Im open to ideas to get this done ASAP, ive got 4 bikes waiting for paint now! Ok i doubt im going to use them over the winter but i'll be nice to get started on them.

My filter is a tube of meshed screen filled with carbon, so nothing fancy really. It is used in open air e.g. not a booth.

 

[Paint munky]

Ah i see, so would this work if i just used this in a un sealed shed? how have you got yours setup?

It looks like a cheaper option, do you spray 2k with this?

 

[marc76]

It filters 2K fumes and is used outside. The motor is locked to a domestic extractor/hood. No mistral but it works. It's 125 mm in diameter (the pipe attachment) and the capacity 180 m3/hr or 106 cu. ft/min.

 

[Paint munky]

as for your filters look here it will give you an idea of what is used

before you go and waste your time you are never gonna heat the booth while you have the extraction fan on.
you can pre heat the area for a while before painting by using a couple of fan heaters built in and filtered obviously on the intake side of the heaters
once you have painted and the overspray has cleared you can then switch of the extraction and turn on the heat for a while
the main thing is to get rid of the overspray heating isnt such an issue as you can use faster activators

Would having a small fan heater blowing into the filtered intake area help?

@ Marc76, Ive checked out those fans, there much cheaper than the ones i was quoted for. So your fan is fixed outside the room? how big is your spray room? is it sealed?

Sorry for all the questions im just trying to get a picture of how to set my room up.

 

[brightspark]

running a small fan heater wouldnt make any diffrence given the amount of volume of air been moved. even a 6kw one wouldnt be much good

 

[Raf]

ive set up a spray room on a budget before for a friend. the stuff was sourced as cheap as possible and overall it works really well (still in use). on a smoke test it cleared the room in around 1min30 ish if i remember.

the walls where made from insulated panels from those refrigerated arctics or a freezer room. they where on ebay at the time and worked out really well. the plan was for 4x2 studwork, plasterboarded and in filled with some sort of insulation.

extraction:
look on ebay for industrial extractors. i bought a 15" one similar to this:

http://www.ebay.co.uk/itm/Industrial-extractor-fan-3-phase-/270831024027?pt=UK_Home_Garden_Hearing_Cooling_Air&hash=item3f0ec9779b#ht_500wt_949

there are a few on ebay used for moving fresh air. once you stick ducting on and esp if there are bends the CFM of the fan reduces vastly, plus its pulling through filters so oversized is good. we used those concertina filters with thin fibreglass filter behind.

as said heating whilst extracting is pointless and gets expensive. we used a propane heater set outside blowing into the room... had dust issues but made a diffuser for it and stuck a fine filter on the intake end of the heater.

propane heat is a little moist but we didnt have issues. the room was about 8ft x 15ft mind.

errm... oh yeah we also had issues with the intake. our area available was too small so we used some intake fans butchered from some car radiator... two sets of twin intakes.


dust was being a major pain in the neck at first.... then we painted it all... walls got white epoxy... floor was a grey epoxy industrial floor paint. floor took 3 weeks to dry before you could drive a car in but that made a massive impact to dust.

oh and lighting.... you need lots of it.
hope some of this helps...

 

[marc76]

Would having a small fan heater blowing into the filtered intake area help?

@ Marc76, Ive checked out those fans, there much cheaper than the ones i was quoted for. So your fan is fixed outside the room? how big is your spray room? is it sealed?

Sorry for all the questions im just trying to get a picture of how to set my room up.

For me it works excellent. I spray small parts most the time and always outside (in open air).

 

[Paint munky]

For me it works excellent. I spray small parts most the time and always outside (in open air).

So your spraying outside? why do you need a extraction fan if your spraying outside?

 

[marc76]

Yes I do like many others I suppose. The painting is just fooling...the filtering works great.

 

[xxxscimitarxxx]

back on topic....DIY 'Polytunnel' spray booth

toying with this as a dismountable garden booth...ebay Polytunnel L.6mxW.3mxH.2m..i can drive my cars through my garage and into my garden....a lot more more details than this but you get the gen idea...if its properly sealed at joints and seams it could work well enough made from scrap parts.....

 

[gaz_moose]

^^i dont think you really need extraction and filters on that if its a 1 time only kinda thing^^

just wet the floor and cut a few slits high in the sides of the poly to allow the vapour cloud to escape.

i painted some bumpers for my trackday car in the garden a few weeks ago and had no dust or insect problems. and thats a metalic colour so i had to do a base coat/colour coat and clear coat. i just waited for a really calm day.trying to lay the primer down in the wind was interesting.

 

[xxxscimitarxxx]

polytunnel spray booth

Your prob right about going over board on design.....the least number of parts to do the job the better (broke my own rules and l am a designer)...and lm only going to get two cars through it at max unless the spraying bug bites me and l start in on everything....but can always grow pot in it after wards......sorry l mean potted plants

I was basing it on this polytunnel model @ 180 quid.....some simpler models for 109

was thinking of laying down a poly sheet with the tunnel on top, sealing the edges with a few heavy timbers or sand bags to make sure it dont blow away.

The central ridge perforated or slotted ducting going in (lol...old tights over holes...haha....l might use new ones!) was for down drafting and gaffa taped filters on the windows (not as many as shown) just to try to be greenish with the VOC's in escaping air...pos pressurise for the whole thing removes risk of paint fumes and extractor fan motor sparks

Stll got to use breathing gear, but the idea was just to give me a lilttle more room than my garage which is long and has workshop but just isnt wide enough to guarantee l dont rub a fresh painted surface

maybe maybe maybe

 

[gaz_moose]

is the central picture the windows? looks like they are just mesh!! if so thats a bonus.leave them open when painting and roll them down when done.

has the front door just got 2 zips down the sides? just leave them a bit open at the top.

id recommend a ground sheet of some description as it saves you getting freshly painted grass.

stuff i painted was green. it was like the perfect crime.