HVLP sprayguns

[graduate_owner]

Hi all,
I have just had an Axminster email about Fuji Paintwiz sprayers and I was wondering if anyone had experience of them. I already have an air compressor with a couple of cheap sprayguns but never used them because it looks to be such a parlaver, what with overspray, personal protection and then the big clean up. So I was wondering what these low pressure ones are like.
The Axminster advert says less hassle cleaning than cleaning a paintbrush, and I have probably over a dozen paintbrushes in my shed, all gone hard after being left in cleaning solution or turps ( which then evaporates) because it is a job I just HATE. So are they really that easy to clean, are they easy to use and get a decent finish, do you still need breathing protection with low pressure?? Any other comments?

Or should I just buy another (yet another) pack of paintbrushes?

K

 

[MikeJhn]

You may find this useful: hvlp-investigation-and-review-t97520.html

The Fuji Paintwiz is a lower spec than the Earlex 5500, read the above and you will see what I mean.

Mike

 

[DiscoStu]

I have an Erbauer one from Screwfix. I bought it to spray a load of tongue and grove MDF that I used to line our spa house. Painting it was a mare because of all the indents. I'm sure the sprayer isn't up to the standard that you're looking for, but I would say that it is easy to clean because you basically empty the paint out and then refill with either water or thinner and spray that through. I'm sure you can do the same with all systems.


Sent from my iPhone using Tapatalk

 

[MattRoberts]

The wood whisperer recently did an HVLP spray gun shootout video, might be of interest

https://youtu.be/IfGzCjRO_ZY

 

[pollys13]

I bought one of these someone put me onto. Sealey S701G Spray Gun Professional Gravity Feed Set-Up, 1.4 mm
Couple of Amazon reviews which I believe are genuine not just ramping up the product, lot of other really positive reviews too.
" I've been a pro automotive painter for many years and I have always thought that guns like sata's and devilbiss were unbeatable.....until now.
This is now my main gun and will have another one on the way shortly.
Don't waste your money on over priced guns get yourself one of these! "
and " Great spray gun. Ive always had Devillbiss suction fed guns but thought I would try a gravity fed gun, I am very pleasantly surprised for such a reasonably priced gun this is just as good as my other guns , better in fact, would recommend this gun to any paint sprayer, professional or hobbyist "
https://www.amazon.co.uk/gp/product/B00 ... UTF8&psc=1
RRP: £59.94
Price: £24.29 FREE UK delivery

 

[MikeJhn]

Just watched the video, what is not mentioned is the difference between a constant bleed gun and a non constant bleed, if you are spraying inside then the difference becomes very important, a constant bleed gun has air going through it all the time, this kicks up any dust in your shop and deposits it guess where.

Mike

 

[MikeJhn]

Pollys13

What HVLP compressor do you have?

Mike

 

[pollys13]

Wolf Dakota 90 Litre, 3HP, 14CFM, 240v, MWP 150psi, 10BAR Twin Cylinder Pump Belt Driven Air Compressor

https://www.amazon.co.uk/Wolf-Dakota-15 ... B007VOLOHG

 

[MikeJhn]

Surely that compressor is not HVLP, I assume you where spraying though the gun at something like 50psi? in which case you defeat the object of a HVLP spray system, the main advantage of which is the amount of control over the gun and the lack of bounce back from the item you are spraying, at only 5:12psi maximum the control you get with an HVLP turbine is quite amazing compared to a compressor system, no overspray to speak of and no bounce back, you have to try one to believe it is possible to spray something without it getting everywhere.

And so much faster than a brush with a perfect finish without any brush marks.

Mike

 

[cowfoot]

I'd buy a couple of decent brushes (Purdy for most stains etc, a nice flat brush for varnish) and a Brushmate.

http://www.paints4trade.com/brush-mate- ... 0wodXlcDSQ

Mark your brush handle with the finish you've used, stick it in the box, pull it out again when needed. Top it up once every six months or so with the liquid, don't use cheapo painted handles (or brass ferrules!). Until the advent of half-decent water based finishes it was an essential bit of kit for us decorators - still is for those of us who occasionally prefer oil based.

 

[n0legs]

Surely that compressor is not HVLP,

Mike

A compressor of suitable capacity, CFM/LPM dependant, will run HVLP spray guns just by setting the correct outlet pressure .
Many guns are sold as HVLP but are actually Compliant guns. They have some of "true" HVLP attributes.
Pollys compressor would struggle to run my HVLP gun, approx 16-20CFM demand, and the BIL's latest Sata would just about dribble paint if plugged in :lol:

 

[MikeJhn]

True, but the majority of compressors do not have the CFM necessary to run a true HVLP gun for any length of time, to get it to work at all would require upping the pressure and you get back to all the bad bits that distinguish compressor guns from HVLP.

HVLP guns and compressors are just not meant for each other, they work on totally different principles, a compressor gun works by the pressure of air atomising the paint and delivering it to the nozzle at comparatively high pressure with all the problems of bounce back and overspray, on the other hand a HVLP gun and turbine uses a high volume of air at low pressure to atomise the paint delivering the paint to the nozzle at a low pressure, with the associated benefits of practically no bounce back and so little overspray that spraying a wall without over spraying onto an architrave is possible without masking, there are supposed HVLP guns out there, as you say, to run on a compressor, but they are a compromise and don't give the benefits of a true HVLP setup, most professional high volume spray shops have changed over to a HVLP system which speaks for itself.

This sort of discussion has been going on since the advent of HVLP and is always brought up by professionals that have been spraying for years using the established compressor type set up, if only they would try HVLP and see the benefits for themselves these discussions would then concentrate on the many benefits HVLP bring to the environment and the operator, only one state in California has banned compressor spraying due to the environmental impact, so far, but it will not be long before others follow suite.

Mike

 

[n0legs]

True HVLP "spray guns" are the same whether they are run from a turbine or a compressor.
The brother-in-law owns a bodyshop and he's been HVLP for 10 years, maybe more, and for some of the accreditations he holds they need proof of method, materials and quantities used. I've seen the change in the booth how HVLP has improved the working conditions and have marveled at how much less materials he uses compared to the old days.
For him it's been win win. Not changing booth filters so often, buying less and paying less to get rid of the little waste he does create.
You're right, HVLP is the way forward.

 

[memzey]

Quick question if you don't mind while we are on the topic; for those of us that have more mid sized compressors (50l in my case) what's the recommended spray gun to get good, high gloss finishes on sheet goods, without breaking the bank?

 

[MikeJhn]

This may answer your question: http://www.spraygunworld.com/Information2/CFM.htm

Also this: http://www.spraygunworld.com/Informatio ... essor.html

And even this: http://www.spraygunworld.com/Informatio ... %20rp.html interesting as it talks about the comparatively new innervation of LVLP.

Mike