Replies

1. 
   nonexxx | May 12, 2003 08:36pm | #1

   <=10 PSI is the government mandate which must be met to call it HVLP.

   Mfgs.  sell special nozzles that have a gauge attached to measure tip pressure.

1. 
   Mach70 | May 14, 2003 03:39am | #3

   Meaning to qualify as HVLP there can be no more than 10 psi at the tip?

1. 
   nonexxx | May 30, 2003 10:17pm | #6

   yes

1. 
   Kevin | May 30, 2003 11:18pm | #7

   Hmmmm.... a qualified yes.

   The gun has to be capable of 10 PSI at the tip to meet the government's definition of HVLP. That doesn't mean that the gun can't be capable of more than 10 PSI at the tip, though. Nothing changes with 11 PSI at the tip of an HVLP gun other than the fact that it doesn't then meet the EPA definition of "HVLP." Another way to state that would be to say that a non-HVLP gravity gun (for example) spraying 10 PSI (or 11 PSI) at the tip is not going to behave the same as a conversion HVLP gravity gun spraying at the same exact tip PSI. The conversion HVLP gravity gun will atomize the same paint better @ 11 PSI at the tip than the non-HVLP gravity gun will.

   Regards,

   Kevin

2. 
   DJK | May 13, 2003 02:43pm | #2

   Many times I have posted plans for a dual motor turbine HVLP unit that will provide 10psi at the gun. The 3 stage motor will produce 5-6 psi. The 7.2" motor coupled in air series with a $50 2 stage will provide the 10 psi. A router speed control can be used to control the air volume or psi. I pitched this plan as an article to FWW but they turned it down saying it's not right for the magazine.

   Dave Koury

1. 
   Mach70 | May 14, 2003 03:43am | #4

   Dave,

   I've seen your posts and even have some pix saved for future reference. One thing I don't understand is how a very expensive 7.5" 3-stage motor can underperform (less than 10 psi) the cheaper 5.2" 1- and 2-stage units found in many systems. Is there more here than meets the eye? Efficiency of the enclosure? Hose size, type, connectors, filters, etc...?

2. 
   ragman | May 15, 2003 02:25am | #5

   I would be most grateful if you could extend a copy of your plans for a HVLP system. I am thinking of building one. Thank you

   Ng Chee beng