HVLP gun upgrade?

> I've not seen adapter/fittings
> that would make it work with the big honking hose on this el cheapo HVLP
> sprayer.
>
Not sure what kind of fittings your cheap HVLP hose has but I can tell
you because I built my own HVLP system that the standard connectors
that come with HVLP guns and on hoses are available at Lowes and HD in
the garden dept. They are actually water hose quick connects. As I
recall they were on the isle with the hoses.

On Aug 4, 2:31 pm, "Swingman" <[email protected]> wrote:
> I have used one of those pacific rim, Campbell->Hausfeld $149 HVLP spray rigs to successfully spray >shellac for a number of years and really don't have a
> personal need an $800 HVLP rig.

WHAT!?!?!!! Of course you do!! Unless you are saving for a Domino...

> Something tells me that these cheap guns are most >likely matched to the turbine that comes with it

Absolutely 100% correct. They are a "system". Usually a two stage
Chiawanese turbine, they may one be a one stage. I think the CH were
all two stage, btw.

(As a side bar, a "stage" is simply the number of impellors the
turbine has on a true turbine powered HVLP system. Obviously a CAS,
or conversion gun which runs off an air compressor has no impellors.
Stages in a turbine are the HV in HVLP. As a general rule of thumb,
the more volume free air you have the heavier the product you can
spray successfully with less thinning.)

CAS guns rely on necking down the pressure to the gun, but also
require volume which is something air compressors don't have when
compared to a turbine. Pressure at volume is the key.

For a turbine powered HVLP, it is all about volume. The canister
style system only requires about 5 lbs or so of pressure to the
canister. (A CAS HVLP is still suction/siphon or gravity fed.) For a
turbine powered HVLP, it only needs about 8 - 10 pounds of pressure,
but lots of it.

> but someone gave me brand new, un-opened >Craftsman HVLP gun a couple of years ago but I've not >seen adapter/fittings that would make it work with the >big honking hose on this el cheapo HVLP sprayer.

It is worth a try, but probably won't work correctly since the turbine
will not generate the air pressure this gun will need to operate
properly. There are some turbine OR compressor guns out there, but
the were designed that way or converted to that use and are sold as
dual powered guns I don't know anyone that has had experience with
the dual use guns, and with the advent of the $100 metal cased HF
HVLP, they have seemed to have gone away.


> http://www.sears.com/sr/javasr/product.do?>cat=Compressors+%26+Air+Too...

Check out the required compressor specs on this gun. The reason these
are not more popular is that it takes a really large (as in non
movable garage sized) compressor to power it PROPERLY. Yes, I know
guys who use these guns and spray... then wait for the compressor to
catch up when they see their spray quality degrade.... then spray...
then wait.... then spray... then wait.... then spray... you get the
idea. You can imagine the quality of finish on anything larger than a
briefcase sized piece.

I had a CAS gun that has lower spec requirements than that one, and my
five hp compressor wouldn't keep up with it for entry doors spraying
urethane.

> Is it even possible/feasible to use a different gun on one >of the $100 HVLP systems?

It is indeed as long as it is in the same system family. They
carefully engineer the aircaps (the horns that break up the paint as
it leaves the fluid nozzle) to the fluid nozzle to hit the sweet spot
on these guns. The useful guns in this family almost always have a
1.4 to 1.6 mm fluid nozzle, which is keeps them pretty close. They
are usually closer to the 1.4 mm range as less fluid flow makes it
easier for the smaller turbine to break up the coating you are
spraying.

Many of these units now have the specs on the gun's aircap (1.5mm
etched on one side and 10 psi on the other) to satisfy the California
labeling laws for commercial use of coating applicators.

There isn't a lot of ground between the HF system for $99 and the
bottom end of a turbine powered system of some repute. Honestly I
don't know how much difference there is in quality of application
between the HF system and quality two stage system except about $250
more for the "better" system.

If you like your turbine better, try their gun on your system and use
their turbine to blow off your project or clean them out. Or as a
backup.

If you want some ideas on a compressor powered CAS gun, let me know
and I can toss out a couple of ideas, and probably so can others here.

> Looks like the weather might start to co-operate around >here and a couple of pending shellac spray jobs >reminded me of the above.

Thank the good Lord. I have been like a little kid with his nose
pressed against the window watching it rain for two months. I
actually am dealing with clients that have had their contractor go out
of business since it has been so long since they were able to get full
payroll sized checks in .

Finally... finally... a few south Texas summer days last week. A full
dance card for next week, which will be the first in long time.
Loving this hot, partly cloudy weather a lot.

Robert

On Aug 4, 5:09 pm, "Swingman" <[email protected]> wrote:

> > WHAT!?!?!!! Of course you do!! Unless you are saving for a Domino...
>
> LOL ... I would, but then I'd have to buy a Tundra to haul it around in! :)

I laughed so hard I was banging on the desk.

Shoots.... scores.... nothin' but net!

Nice shot!

Robert

(Hey Leon... we're just kiddin'....)

On Sat, 4 Aug 2007 16:59:02 -0500, "Swingman" <[email protected]> wrote:

><[email protected]> wrote in message
>
>> Finally... finally... a few south Texas summer days last week. A full
>> dance card for next week, which will be the first in long time.
>> Loving this hot, partly cloudy weather a lot.
>
>I hear you! ... I've had a foundation waiting to pour for a month. Did get
>the piers poured last week, but I'll be damned if I'm going to do any
>excavation in the morning just to have it fill up with water before evening.
>Also got trusses that are going to be subject to a weekly storage fee if I
>don't get them on top of a 1st floor frame pretty soon. While it hasn't
>rained to speak of in a few days, I'm gun shy just seeing a cloud in the sky
>after the last two and a half months. I'm hoping to pour Tuesday.
>
>Thanks, Robert, Frank, and Mike for the HVLP info. I'm willing to try
>anything, but my little 12 gallon air shop/nailer compressor is certainly
>not up to the task of delivering the "minimum required" 7 cfm @ 40psi that
>it says on the side of the gifted spray gun box.

Depending on how big your work piece is, you might give it a shot and
see what you can do. My 20 gal. 5hp (read that 1.5 hp the way it
should be rated) has 7.5 cfm @ 40psi, which is about the gun
requirement rating, however, the chart says I can get about 80 seconds
of continuous trigger time before it runs out and has to catch up. 80
seconds is a long time. I doubt that I spray more than 10-15 second
bursts without giving the compressor time to catch up.

Frank
>
>I'd bet the CH rig wouldn't even have that type of info, but I'll look.

B A R R Y wrote:

> On Sat, 4 Aug 2007 15:37:51 -0500, "Swingman" <[email protected]> wrote:
>
>
>>I've never seen anything on a shelf that looks remotely like it would fit
>>the bill to go from the water hose, to the "standard spray gun" fitting on
>>the gun in that picture?
>
>
> The cheapies don't have garden hose fittings, but my Fuji does. My
> cheapie has a tapered, friction fit.
>
> Do you or Leon have a lathe? Maybe you can turn an adaptor from UHMW
> plastic or possibly maple, threading it with a modified hose
> connector.
>
> Another idea would be to splice a cheapie hose to a garden hose.
>
> ---------------------------------------------
> ** http://www.bburke.com/woodworking.html **
> ---------------------------------------------


I have a cheapie like that.

They are alnost vacuum cleaner parts...


Richard

<[email protected]> wrote in message

> Finally... finally... a few south Texas summer days last week. A full
> dance card for next week, which will be the first in long time.
> Loving this hot, partly cloudy weather a lot.

I hear you! ... I've had a foundation waiting to pour for a month. Did get
the piers poured last week, but I'll be damned if I'm going to do any
excavation in the morning just to have it fill up with water before evening.
Also got trusses that are going to be subject to a weekly storage fee if I
don't get them on top of a 1st floor frame pretty soon. While it hasn't
rained to speak of in a few days, I'm gun shy just seeing a cloud in the sky
after the last two and a half months. I'm hoping to pour Tuesday.

Thanks, Robert, Frank, and Mike for the HVLP info. I'm willing to try
anything, but my little 12 gallon air shop/nailer compressor is certainly
not up to the task of delivering the "minimum required" 7 cfm @ 40psi that
it says on the side of the gifted spray gun box.

I'd bet the CH rig wouldn't even have that type of info, but I'll look.


--
www.e-woodshop.net
Last update: 6/1/07
KarlC@ (the obvious)

<[email protected]> wrote in message

"Swingman" wrote:
> > I have used one of those pacific rim, Campbell->Hausfeld $149 HVLP spray
rigs to successfully spray >shellac for a number of years and really don't
have a
> > personal need an $800 HVLP rig.
>
> WHAT!?!?!!! Of course you do!! Unless you are saving for a Domino...

LOL ... I would, but then I'd have to buy a Tundra to haul it around in! :)


--
www.e-woodshop.net
Last update: 6/1/07
KarlC@ (the obvious)

On Sat, 4 Aug 2007 15:37:51 -0500, "Swingman" <[email protected]> wrote:

>
>I've never seen anything on a shelf that looks remotely like it would fit
>the bill to go from the water hose, to the "standard spray gun" fitting on
>the gun in that picture?

The cheapies don't have garden hose fittings, but my Fuji does. My
cheapie has a tapered, friction fit.

Do you or Leon have a lathe? Maybe you can turn an adaptor from UHMW
plastic or possibly maple, threading it with a modified hose
connector.

Another idea would be to splice a cheapie hose to a garden hose.

---------------------------------------------
** http://www.bburke.com/woodworking.html **
---------------------------------------------

Swingman wrote:
> <[email protected]> wrote in message
>
>
>>Finally... finally... a few south Texas summer days last week. A full
>>dance card for next week, which will be the first in long time.
>>Loving this hot, partly cloudy weather a lot.
>
>
> I hear you! ... I've had a foundation waiting to pour for a month. Did get
> the piers poured last week, but I'll be damned if I'm going to do any
> excavation in the morning just to have it fill up with water before evening.
> Also got trusses that are going to be subject to a weekly storage fee if I
> don't get them on top of a 1st floor frame pretty soon. While it hasn't
> rained to speak of in a few days, I'm gun shy just seeing a cloud in the sky
> after the last two and a half months. I'm hoping to pour Tuesday.
>
> Thanks, Robert, Frank, and Mike for the HVLP info. I'm willing to try
> anything, but my little 12 gallon air shop/nailer compressor is certainly
> not up to the task of delivering the "minimum required" 7 cfm @ 40psi that
> it says on the side of the gifted spray gun box.
>
> I'd bet the CH rig wouldn't even have that type of info, but I'll look.
>
>

I you read the two reviews on the Sears link you posted both reviewers
state that they couldn't even spray water at 40 psi (it took 60 psi).
Both reviews gave the gun's performance a one on a scale of 1-5.

--
Jack Novak
Buffalo, NY - USA
[email protected]

On Sat, 4 Aug 2007 14:31:07 -0500, "Swingman" <[email protected]> wrote:

>I have used one of those pacific rim, Campbell-Hausfeld $149 HVLP spray rigs
>to successfully spray shellac for a number of years and really don't have a
>personal need an $800 HVLP rig.
>
>Something tells me that these cheap guns are most likely matched to the
>turbine that comes with it, but someone gave me brand new, un-opened
>Craftsman HVLP gun a couple of years ago but I've not seen adapter/fittings
>that would make it work with the big honking hose on this el cheapo HVLP
>sprayer.
>
>http://www.sears.com/sr/javasr/product.do?cat=Compressors+%26+Air+Tools&pid=00915519000&vertical=TOOL&subcat=Automotive+Air+Tools&BV_UseBVCookie=Yes
>
>Is it even possible/feasible to use a different gun on one of the $100 HVLP
>systems?
>
>Looks like the weather might start to co-operate around here and a couple of
>pending shellac spray jobs reminded me of the above.


The Sears gun shown is a "conversion" hvlp, that is it works with a
regular air compressor. It won't work, to my knowledge, with a turbine
type air source. But you can hook it directly to your compressor and
get the same HVLP characteristics. It uses a lot more air than a
standard high pressure air atomized gun.

I have a conversion gun (a porter cable) and like it fine, but I've
never used a turbine system.

Frank

"Mike in Arkansas" wrote in message

> Not sure what kind of fittings your cheap HVLP hose has but I can tell
> you because I built my own HVLP system that the standard connectors
> that come with HVLP guns and on hoses are available at Lowes and HD in
> the garden dept. They are actually water hose quick connects. As I
> recall they were on the isle with the hoses.

I had absolutely no idea that was the case, but getting from here to there
(adapter) is the big question.

I've never seen anything on a shelf that looks remotely like it would fit
the bill to go from the water hose, to the "standard spray gun" fitting on
the gun in that picture?

--
www.e-woodshop.net
Last update: 6/1/07
KarlC@ (the obvious)