Spray Booth

[Welderpaul]

lol...just so happens i am a professionel painter and use 2 pack paint and very familiar with booths

Great stuff. Any tips on building spraybooths mate?

 

[Drains]

Great stuff. Any tips on building spraybooths mate?

Looks like trade secrets to me... loiner's messing with your head. He knows, but he aint gonna tell you!

Nice, as he's in Leeds too!

 

[loiner1965]

Great stuff. Any tips on building spraybooths mate?

waterwash booths are illegal lol..
basically paint all walls white and cover with clear polythene which can be disposed off and then apply more...obviously plenty of light and the idea is to pump filtered air in but take more filtered air out which creates a negative pressure in the booth ie doors are sucked so no paint can escape....the filter on the floor will block up thus creating positive pressure ie doors blowing open so paint escape so you need to have a powerful extractor with a damping plate so you can manually adjust it to keep a nice balance otherwise you will constantly be changing the floor filters...rad fans for extractors are not a good idea as rhe volume you be painting they will be useless

 

[loiner1965]

........air fed masks are what i use but you need a dryer on your compressor otherwise you be breathing warm moist air which is bad...also you will need proper oil / water separators in the regulators for obvious reasons...if not 2 pack then use carbon reuseable masks not as good but better than anything else....if you need more advice then i be happy to talk more in depth....ahhhhh at last something i am quite knowledgeble about rather than welding

 

[loiner1965]

I hope to make mine a positive pressure booth (clean air being blown in)

So I’ll have two fans plus ducting for the space heater and maybe a fan for the outlet

Any leaks will blow out so dust getting in shouldn’t be a problem

positive booths are a no no as anyone working outside the area will be subject to the paint,,,i e people will chew your butt but positive side is your finish will be cleaner lol

 

[loiner1965]

This is what i was planning on doing - any thoughts anyone

nice pic.....they will be no air movement in the booth as your inlet is too high....in my job booths use to be able to have at least 3 air changes a minute but i think its around 5/7 now....also your outlet has to be higher than your roof and also any houses within twenty yards or so it must be higher than the apex of their roof...these regs are for car body shops so can be different to your job but i be honest anything to do with v.o.c and they are getting real tough now sobe careful

 

[Drains]

I'll add another contribution to the spray booth subject. The local fab shops to me spray outside, under cover. No vent issues at all, plus no residential neighbours to worry about, and the council don't seem to mind at all. It's all zinc red oxide though. They don't finish paint.

 

[rtbcomp]

....also your outlet has to be higher than your roof and also any houses within twenty yards or so it must be higher than the apex of their roof...these regs are for car body shops so can be different to your job but i be honest anything to do with v.o.c and they are getting real tough now sobe careful

A car body shop near me has a contraption on the roof that would put a Mosque to shame.

 

[snowcat]

I'll add another contribution to the spray booth subject. The local fab shops to me spray outside, under cover. No vent issues at all, plus no residential neighbours to worry about, and the council don't seem to mind at all. It's all zinc red oxide though. They don't finish paint.

Same as me and oxide does not seem to produce much over spray... I dont do paint.

 

[loiner1965]

Same as me and oxide does not seem to produce much over spray... I dont do paint.

unless you use hvlp sprayguns as i do 40% of your paint will be overspray......i think hvlp is around 15-20 %

 

[snowcat]

unless you use hvlp sprayguns as i do 40% of your paint will be overspray......i think hvlp is around 15-20 %

Hvlp...Is that like a roller,..........I let someone else do my spraying as mines crap, Cant stand painting

 

[loiner1965]

Hvlp...Is that like a roller,..........I let someone else do my spraying as mines crap, Cant stand painting

lol....done it for 30 years so its easy peasey....welding 5 mins lol,,,,,,,,,,,,,got panel bashers to do any welding i may need doing

 

[FireStorm]

as i'm just crap in general!!! heres my bit

i do banger racing, i spray in my garage with gloss and petrol / white spriti depending what i got at the time.

i have the garage doors open with 2 fans wired up to suck air out, and then i have the garage door which is over end open but with a curtain across the door so there is abit of air but it doesn't blow dirt n dust in.

of course gloss is harmless so i'm ok

but i do have a mot / crash repair centre next door who spray in 2 pack and don't filter the booth out. In the winter it isn't to bad but during the summer you can really small the laqor ? spelling ? and the 2 pack and it's horrible, we have complained to the cnutcil about it but they refuse to do anything as they are allowed to spray cars.

so what ever you do paul just think of your neighbours

 

[zardoz]

unless you use hvlp sprayguns as i do 40% of your paint will be overspray......i think hvlp is around 15-20 %

is it correct that hvlp sprayguns are better for a non professional sprayer ? ie: will give a better finish ?

ps: here is something i just found on spraybooths and their regulations
Click me for spraybooth info

 

[classic2cv]

unless you use hvlp sprayguns as i do 40% of your paint will be overspray......i think hvlp is around 15-20 %

i use HVLP sprayguns myself

i have a turbine set and guns that run from a compressor

i get very little overspray

more paint on the car and less in the air

 

[loiner1965]

is it correct that hvlp sprayguns are better for a non professional sprayer ? ie: will give a better finish ?

ps: here is something i just found on spraybooths and their regulations
Click me for spraybooth info

not really as the guns i use are devibliss gti and consume vast amounts of compress air plus i have an airfed mask running off the same airline....your compressor / dryer needs to be really powerful to run these....figures from the top of my head are around 100psi into the mask reg/gun to achieve 8...10 psi at the gun nozzle,,,conventionel guns run around the 55psi mark

 

[classic2cv]

i've just been given this vent fan

it's a 1ph (240v mains) and 15" across

it;s made by a firm called Woods

but i'm not sure how to wire it up

does anyone have any clues ???

 

[Wozzaaah]

Are you sure it's single phase? Just because it says 220/240V it's not necessarily SP, it may be 3PH. Hmmm, there's 5 wires though, are they all connected into the motor?
3 phases, neutral and one as an earth?

 

[Welderpaul]

Your probably best opening up the plate on the fan where the cables are connected to the terminals to see what they are actually connected to.
I've seen the exact same as above on a drilling machine. Three of the red wires were connected to L1, L2 and L3, Black was neutral (as normal) and the additional red was earth! The cables had been marked as such in the connection box, but when cropped off those markings were lost!
PS I am a welder, not an electrician!

 

[Wozzaaah]

Paul posted his answer while I edited mine.