not enough cfm for my sata hvlp

J

jamon8

I was just looking up the cfm requirements for my sata 3000 hvlp and it requires over 15 at 29 psi and my compressor only makes 12.3 at 40. this has not stopped me from painting in the past and my jobs came out just fine. should I pause for a minute when doing a complete and let the compressor catch up or am I screwed
 
You can get a 5 gallon expansion tankbso you can spray longer before pump kicks in
 
You have less than 80% of the air supply the gun calls for. Compressor will turn on and run full time while spraying. This will generate more heat which equates to more moisture and even then the gun will not perform to its potential.
 
its more than 80% I spray my base at 29 psi which is 11 less than the 12.3 at 40 which equals 82%. I think before I do another complete I may just sell my air compressor and get a bigger one. can anyone tell me the difference between single and dual stage air compressors
 
you surely want a 2stage comp. if given a choice. The cfm output on a 2stage is higher and the pressure cut-out is higher. With a 2stage I would get a 5hp with an 80gal tank, that way you have the reserve air needed for working tools. the cycle time will be less also. Make sure your electric can handle the load. If you can swing it I would look into an aftercooler with a fan also, that mounts between your units head and the tank and acts like a cars radiator, it cools the air going into the tank to room temp and the moisture in the compressed air will condence and fall to the bottom of your tank keeping it from being suspended in the air. The compressed air tube going into the tank can reach 300deg when run hard and will burn you fast with the aftercooler just warm.
 
jamon8 said:
its more than 80% I spray my base at 29 psi which is 11 less than the 12.3 at 40 which equals 82%. I think before I do another complete I may just sell my air compressor and get a bigger one. can anyone tell me the difference between single and dual stage air compressors
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There are two different measures used in determining the air requirements. CFM (sometimes referred to as SCFM) which is a measure of Volume and then there is the PSI which of course is a measure of Pressure. The Sata 3000 HVLP requires a 15.2 CFM at 29 PSI to operate correctly. Thus 15.2 Cubic Feet per Minute (volume) of air delivered at 29 PSI. Lowering the pressure at the gun does not increase the amount (Volume) of air the gun receives.
I was referring to the Volume or CFM requirement when I said 80%. (technically 80.9%) The gun needs 15.2 and your compressor puts out 12.3.
 
I am going to be honest when I first started using the gun with my compressor I am sure it was wore out because now that I have a new pump it sounds so much newer. cant really explain it any better than that. I found out what a new pump puts out, and what my gun requires, it does not match up. only thing is when I was ignorant of the cfm requirements I did several completes with the setup and the metallic laid out really nice. now that i know better I have one more complete that is single stage flat black. that will get sprayed with my 4000 rp and everything will be ok. A new compressor is in my future and I am looking to buy one that will run two garages.
 
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