Trying to deduce suitable compressor?

[flanajb]

I have recently started making concrete furniture and am looking at buying a spray gun. The gun comes from the US and they state that a suitable compressor would be

"12 cfm @ 100 psi (340 liter@ 7 bar)
gas power or electric air compressor,
with 15 to 30 gallon (60-114 liter) air tank."

This means nothing to me, and to date I have not been able to find something along those lines here in the UK. I suspect it is because they use a different notation to here in the UK?

If you are able to decipher the actual spec and can post a link to a machine in the UK, then I would be really chuffed.


Thanks

 

[n0legs]

Depends how much you want to spend, but here's a few that will run the spray gun.

http://www.machinemart.co.uk/shop/produ ... driven-air
http://www.machinemart.co.uk/shop/produ ... r-se16c100
http://www.machinemart.co.uk/shop/produ ... compressor

I'd go for the middle one ( se16c100) but as with all Machine Mart stuff check the specs in a store, what's advertised and what is real can differ.
Then again that goes for most sellers of compressors.

 

[flanajb]

Depends how much you want to spend, but here's a few that will run the spray gun.

http://www.machinemart.co.uk/shop/produ ... driven-air
http://www.machinemart.co.uk/shop/produ ... r-se16c100
http://www.machinemart.co.uk/shop/produ ... compressor

I'd go for the middle one ( se16c100) but as with all Machine Mart stuff check the specs in a store, what's advertised and what is real can differ.
Then again that goes for most sellers of compressors.

Thanks. SO just for my own understanding. The clarke spec states

14cfm displacement - cast iron, twin cylinder compressor pump
100 litre air receiver (CE certified)
3Hp motor, 230V, 1ph continuously rated with overload protection
10bar (150psi) maximum working pressure controlled by a fully automatic pressure switch.

Does that mean the compressor can supply 14 ft3 / min at a pressure of 10 bar (150 psi). so as long as your tool does not consume more than that then you can run it continuously without the tank running out?

 

[n0legs]

Yes that's pretty much it. If the load of the spray gun was higher than the output of the compressor, the compressor wouldn't be able to keep up with the demand.
As I said though check the rating plate in store. Some quote the piston displacement, which is higher than the FAD ( free air delivery).

 

[woodfarmer]

If there is a choice, get as big a reservoir as you can. I have found often they quote free air, but the accessories use compressed air so you run out of air. Big reservoir helps even it out, bit like having a big battery in a vehicle.

Watch also starting current. I inherited a long run of not too thick cable into the barn where my compressor lives. It wouldn't restart half full of air due to volts drop starting against a load. Since putting in a much heavier duty supply for my 4KW motored log splitter (53 amp) it now starts easily. and even my 3Kw table saw is faster off the mark.