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3/8 air hose line9/13
I am going to switch my air lines from 1/4 to 3/8 to run an hvlp gun. I read a lot of past posts here and they are very helpful but my question is are all 3/8 fittings the same as fittings specifically called 3/8 high flow? Some members have suggested the fittings at lowe's and that's fine but they do not say high flow. Also the hoses i seen at local outlets are 3/8 but the connection is still 1/4 thread, am i making a mountain out of a mole hill? And yes the 3/8 fittings are also 1/4 thread. Thanks in advance.
I use only High flow. I was using the others and couldn't understand why I had sporadic problems with my CAT CPR guns with PPS system. The Car rep came in switched me to a larger diameter hose and the High Flow fittings. No problem since.
Switching from regular 1/4" fittings & 1/4" hose to 3/8" high flow fittings & 3/8" hose will make a noticeable difference with your HVLP gun. Remember that its high volume low pressure. The turbine hoses are 3/4"(I think).
The high flow fittings are 3/8" nominal thru the fitting, whereas normal fitting shrink down.
Compare the 3/8" high flow fitting to your regular 1/4".
I noticed a big difference going to
I found a place close buy that makes all kinds of hydraulic lines and air hoses. They set me straight. The high flow fittings will have a 1/4 npt thread that is necessary for the gun attachment, filters etc. I ordered some lines today 3/8 ID and all high flow fittings including the quick disconnect. After looking at my old set up i can't believe i was able to lay down a smooth coat at all. Maybe i won't need a new gun after all. Thanks to all for the advice.
Home Depot sells 3/8" fittings that
Thanks Jim that's what i was originally looking at. They and Lowe's sell 3/8 fittings and the online supply stores sell them also but they call the same fittings high flow fittings so that was my concern if their was something different between the two. Their is no difference. I'm having them made up for me locally and the good part about that is in the future when i want one more fitting i can buy that and not be locked into the package deal at the big box stores.
I often pose these pictures on the paint
I like the pressure gauge idea i also do not like the gauge attached to the gun, just gets in the way. My new lines will have the larger high flow fittings and also the line will be 3/8 ID. Still waiting for them to make them.
Having a gauge on the gun is important. The pressure on the wall should be higher than the gun pressure. 50psi on the wall if its 30psi at the gun.
There can be quite a bit of pressure loss after the air goes thru the fittings and whatever length of hose you use.
The sell gun specific gauges that are not large like Jim's. You don't notice them when you are spraying.
I just changed out all my air fittings to the high volume ones and the difference is remarkable... Where l was spraying 40psi on my pressure gauge below my filters and a 5-10 lb pressure drop when I pulled the trigger I'm now spraying at 30psi with a 2-3lb pressure drop when triggering and getting finer atomization...l guess l was starving my hvlp and rp guns for cfm all along...even though my compressor puts out plenty of air it wasn't making it to the gun.