silent compressor build

n brown

n brown

Forum Member
son's been in my shed most of the day re-building his [almost] silent compressor. he made it from an old busted compressor and 2 fridge pumps off a couple of scrap freezers. these pumps can deliver over 200 psi, and enough air to spray paint- he use his mainly for airbrushing
these pumps blow a small amount of oil which is caught in the moisture traps and at the moment is manually fed back to the pump '
so, for hardly any money and a day's work, he's got a machine no noisier than a fridge, that you could buy in a shop for just shy of a grand
 

Alf

I was making them in the 70's also used as a vacuum pump when recharging deep freezers Tecumseh were the best.

Alf




n brown said:
son's been in my shed most of the day re-building his [almost] silent compressor. he made it from an old busted compressor and 2 fridge pumps off a couple of scrap freezers. these pumps can deliver over 200 psi, and enough air to spray paint- he use his mainly for airbrushing
these pumps blow a small amount of oil which is caught in the moisture traps and at the moment is manually fed back to the pump '
so, for hardly any money and a day's work, he's got a machine no noisier than a fridge, that you could buy in a shop for just shy of a grand
Click to expand...
 
witzend

witzend

Forum Member
I've made several over the years and a calor bottle for a tank didn't realise that the compressors where still available haven;t seen one for years now
 

sparrks

n brown said:
son's been in my shed most of the day re-building his [almost] silent compressor. he made it from an old busted compressor and 2 fridge pumps off a couple of scrap freezers. these pumps can deliver over 200 psi, and enough air to spray paint- he use his mainly for airbrushing
these pumps blow a small amount of oil which is caught in the moisture traps and at the moment is manually fed back to the pump '
so, for hardly any money and a day's work, he's got a machine no noisier than a fridge, that you could buy in a shop for just shy of a grand
Click to expand...

I could do with one of them to power my steam engines :)
 
n brown

n brown

Forum Member
i too first used one as a tyre inflator in the 70s,got the idea from a Yank hippy mag called Mother Earth News, that was a goldmine of practical knowledge and ideas
 
mistericeman

mistericeman

Forum Member
sparrks said:
Maybe with a decent reservoir it may work. The engines are Stuart models with the Beam engine being the largest.
Click to expand...

You could always link several together I guess... and oil migration probably wouldn't be a problem as, long as you kept the compressor topped up with oil.
 
trevskoda

trevskoda

Forum Member
After running a spray paint shop for years i can tell you its not the psi that matters but the cfm/cubic feet p-min.
So most proper spray guns like a binks 630 gravity top feed are used at about 40/60 psi using the on board regulator valve,but they do require about 14/16 cfm from the pump head not the tank which confuses folks.
Sales men like to tell you that a compressor is a 200 ltr tank etc ,our biggest compressor had no tank at all and put out 200cfm at the outlet,it was a screw unit used for shot blasting,but the one we used to spray with was a 28 cfm running two guns most days.
Most compressors are set to kick out around 120 psi and kick in at around 80 psi but you can ajust this at the pressure switch to your own requirements,the end user psi is set at the gun air control,there should be 3 controls on a gun ,air paint flow and fan.
My other fav / gun is a iwata swivel side cup which is good for spraying upside down or strange angles,i use a 1.5 to 2mm flued nozzle for heavy zink 2 pack epoxy or clor rubber or poly paints.
 
mistericeman

mistericeman

Forum Member
trevskoda said:
After running a spray paint shop for years i can tell you its not the psi that matters but the cfm/cubic feet p-min.
So most proper spray guns like a binks 630 gravity top feed are used at about 40/60 psi using the on board regulator valve,but they do require about 14/16 cfm from the pump head not the tank which confuses folks.
Sales men like to tell you that a compressor is a 200 ltr tank etc ,our biggest compressor had no tank at all and put out 200cfm at the outlet,it was a screw unit used for shot blasting,but the one we used to spray with was a 28 cfm running two guns most days.
Most compressors are set to kick out around 120 psi and kick in at around 80 psi but you can ajust this at the pressure switch to your own requirements,the end user psi is set at the gun air control,there should be 3 controls on a gun ,air paint flow and fan.
My other fav / gun is a iwata swivel side cup which is good for spraying upside down or strange angles,i use a 1.5 to 2mm flued nozzle for heavy zink 2 pack epoxy or clor rubber or poly paints.
Click to expand...

FAD (free air delivery) is everything..... ;-)
 

mandrake

once remember my dad using a hoover sledge vac with the paint spray gun accessory you could get with them to spray a ford anglia he had back in the 70s dident make a bad job of it as i remember ,only trouble with the hoover was bits of dust been blown out from the innards if you left the dust bag in .
 
mistericeman

mistericeman

Forum Member
Fletch6 said:
Machine mart used to sell them for air compressors, might still do.
They don't make good vac pumps as they only pull a vac in the -20s I found the R22 ones worked best (or not as bad)
Click to expand...


If you want a vacuum ....just buy a airconditioning vac pump (We use them to evacuate ac systems down to 1 torr before introducing refrigerant .

Not too long ago we scrapped 12 of these 6 cylinder semi hermetic Carlyle compressors from a car plant in Liverpool ...big buggers they were and had been in place since the plant was built .All the control systems were electro mechanical with not a PCB to be seen lol.

30hp Carlyle semi compressor - YouTube
 
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