Is it possible to turn a regular run-of-the-mill paint sprayer (siphon type,
used with a pressurized paint pot) into HVLP?
I'm thinking, just turn down the air pressure to the gun, turn up the
pressure to the paint pot??
It couldn't be that simple, could it?? LOL
Or is there a different atomization process in HVLP?
True HVLP guns use a turbine compressor, like a vacuum cleaner in
reverse, a big air hose and very low pressure. The finish just wafts
out of the gun. I got to play with one at a woodworking show, you
could control it about like an airbrush, the edges of the finish cloud
were that defined. Not much bounce-back from an interior surface,
either, like the inside of a cabinet. The demonstrator at that show
was touting it as being "green", suited to spraying water-based
lacquers and varnishes. I've also used one of the so-called HVLP
conversion guns that hook up to a regular compressor. They do take
less pressure, the ones I have are top-feed and have a whole lot more
overspray. They take less air, too, but aren't the same as a real HVLP
outfit. They can make an otherwise marginal compressor more useful.
You probably aren't going to turn a siphon-fed gun into any sort of
conversion gun. If you want one of the conversion guns to try out, HF
regularly blows them out on sale for $20 or so. Worth it if you just
want to try out the concept. You'll need the stand to load one,
though. HF had a real HVLP outfit for about $80, haven't looked
lately to see if it's still cataloged. Don't know how good it is,
I have a couple HF conversion guns, The older 43430 and a current model
66222. Both work well for the price. They are knock-offs of SATA. You do
have to look them over close before you buy though. There are problems
with the passages being drilled off center on some. Not a good thing.
I also have a set of the 94572 They are not a bad gun, they are a
knockoff of Iwata units (Although Iwata are also made in China so these
may be from the same plant, just the other side and re-badged)
Here is some helpful info on setting one up and what to look for.
They work pretty good for base/clear paint. But like all the hybrids you
need a bunch of air to make the work properly.
I was hoping, I was hoping.... LOL
I see from Stans response that they are two diff. animals.
Inneresting how well-defined the edges are, in HVLP -- almost, well,
If the HF HVLP is only $80 and available, I might try it out.
Btw, that HF paint pot is *totally* different than using the siphon cup that
comes with the spray gun.
The siphon action simply can't deliver the volume/coverage that the
pressurized paint pot can. The regulator on the paint pot gives another
level of control, as well.
Later, I'll post my saga, learned quite a bit.
So $80 with the Sunday 20% coupon in the paper.
I've used the HF conversion guns for spraying a lot of shellac on
small woodworking projects, work well for that. The local Rockler has
small pointy supports for doing that sort of thing. Wouldn't want to
try doing a house or a car with the things, but for my small stuff,
they work OK. Nice thing about shellac is the easy cleanup. Even if
the stuff dries in the gun, you can get it going again with a little
If you're considering a HF HVLP sprayer, try TCPGLobal instead
Seem to be the same as Harbor Freight and TCP keeps the parts and
different sized needles and aircaps in stock. Went to them when HF
couldn't provide me a larger needle and cap for the purple gun.
Incidentally, the one that came with the TCP gun fits my HF gun just
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.