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Building Tips and technical articles. => Paint and finishing => Topic started by: adam collver on August 25, 2013, 10:57:24 AM

Title: Want to spray
Post by: adam collver on August 25, 2013, 10:57:24 AM

How much psi does a compresser have to have to spray dope?

Title: Re: Want to spray
Post by: Allan Perret on August 25, 2013, 11:26:39 AM

Pressure is not normally the issue as most compressors go up to about 100 psi and most guns need only 35~50 psi at the inlet.   Its more about the volume needed from the compressor/tank system to keep up with what your gun requires.  For a full size gun I would suggest at least a 20 gallon tank.  Detail guns would work OK with the smaller pancake type units used for pneumatic nail guns.  
What gun do you have or looking at getting ?  Check the manufactures specs on the gun for the CFM required and try to match that to the compressor's output.  You can get by with a lower compressor CFM rating than the gun CFM with a larger tank volume.