Devilbiss GPG types

Any questions about tools or supplies. Post your compressor/gun questions here.



Settled In
Posts: 95
Joined: Thu Oct 01, 2020 4:45 pm

Country:
USA
PostPosted: Thu Jul 01, 2021 5:06 pm
I can’t find any info on the various types of GPGs. The sales people on the phones seem short staffed and uninformed and the websites I’m seeing ( from this phone anyway) are short too. If anybody can fill me in on their experience with any type of GPG gun I’d greatly appreciate it. I don’t know what the High Efficiency ones are good at, for instance. I think I saw they have a super low tip psi like maybe 1.6 psi? Also saw a GPM2. I think they’re all HVLP. Maybe all the GPMs are high efficiency? Thanks



Top Contributor
Posts: 6217
Joined: Tue Sep 16, 2008 1:17 pm
Location: Pahrump NV.
Country:
USA
PostPosted: Fri Jul 02, 2021 6:59 pm
Are you talking about the 670 series Plus guns?

If so I have one use it for clear. it likes 35-40 psi for clear with Hi flow fittings
Last edited by Doright on Sat Jul 03, 2021 12:02 am, edited 1 time in total.
Dennis B.
A&P Mechanic, FCC General radio Telephone Operator
Line Maintenance A&P Mechanic and MOC Tech specialist.

User avatar

Top Contributor
Posts: 2773
Joined: Sun Dec 16, 2012 4:46 am
Location: Canberra
Country:
Australia
PostPosted: Fri Jul 02, 2021 9:01 pm
Doright wrote:Are you talking about the 670 series Plus guns?


No mate. They're the GFG - high efficiency, high flow industrial guns

The GPG is a general purpose automotive gun that sits, pricewise in between the entry level FLG5 and the Pro Lite. Good solid all rounder guns that are made in England and very reliable with nice consistent spray patterns.

There are a few variants and it looks like aircaps vary either by market or by number.

For example, the following copied from an Australian site. Note that the best aircap is denoted as the "GPG1". Also note that you'd need an industrial size compressor for the HVLP aircap. 450l/m! :shocked: the others seem fairly sensible, with the primer one needing a little more, to cope with the heavier product.

GPG1 - High Efficiency

General purpose air cap can be used with basecoats & clearcoats
Air consumption 270 l/min (9.5cfm)
Recommended air inlet pressure 29psi (2.0 Bar)
Typical fan pattern width 270-290mm @ 200mm distance
Nozzle sizes available – 1.2, 1.3, 1.4, 1.5, 1.6, 1.8, 2.0 & 2.2mm

GPG2 - HVLP

HVLP air cap can be used with basecoats & clearcoats
Air consumption 450 l/min (15.6cfm)
Recommended air inlet pressure 26psi (1.8 Bar)
Typical fan pattern width 270-290mm @ 200mm distance
Nozzle sizes available – 1.2, 1.3, 1.4, 1.5, 1.6, 1.8, 2.0 & 2.2mm

C30 - Conventional

Conventional air cap can be used with basecoats & clearcoats
Air consumption 305 l/min (10.8cfm)
Recommended air inlet pressure 29psi (2.0 Bar)
Typical fan pattern width 240-265mm @ 200mm distance
Nozzle sizes available – 1.4, 1.6 & 1.8mm

C86 - Conventional

Conventional air cap can be used with basecoats & clearcoats
Air consumption 300 l/min (10.6cfm)
Recommended air inlet pressure 29psi (2.0 Bar)
Typical fan pattern width 275-290mm @ 200mm distance
Nozzle sizes available – 1.4, 1.6 & 1.8mm

PR10 - High Efficiency

High efficiency air cap designed for primers
Air consumption 340 l/min (12.0cfm)
Recommended air inlet pressure 29psi (2.0 Bar)
Typical fan pattern width 265-305mm @ 200mm distance
Nozzle sizes available – 1.4, 1.6, 1.8, 2.0 & 2.5mm


By comparison, from autorefinishdevilbiss.com, the best aircap is the 7E7, which is the premium RP or HE aircap from the Tekna Copper.
gpg.jpeg


The GPG looks like the old GTi Pro, so a bit bigger and heavier than the Pro Lite and with the right aircap it should spray just like the GTi Pro or Tekna Copper.

That really means that it is a premium gun that Devilbiss are selling at a much reduced price, with just an anodised body to make it look a bit downmarket. Of course, they've long ago amortised the development costs of this body and the aircaps, so there's no pressure on them to recover those costs, making this gun exceptional value. The range of aircaps and fluid tips means that those who don't want to have to pay out for two guns can still get a choice of sizes to suit primers and top coats, just by adding aircaps and nozzles.

A lot more information in the manual here.

Gunny's done a bit of a review on them too here.

For OP, a GPM is a high pressure water washer, not a spray gun.
Chris



Settled In
Posts: 95
Joined: Thu Oct 01, 2020 4:45 pm

Country:
USA
PostPosted: Sat Jul 03, 2021 2:22 pm
Thanks Chris,
Lotsa great info there
I saw one GPG offered with the 7E7 cap somewhere so maybe I’ll look for that.
Was hoping the Gunman was going to say something comparing the efficiency GPGs with the HVLPs but the whole review was quite helpful anyway.
GPM was either a typo or the plumbing part of my brain, meant GPG2.

I’m pretty sure I have the 16 CFMs for the HVLP, as I was blasting with a 3/16 nozzle with my compressor with loose belts. Tightening the belt almost doubled the speed of the pump which is a Type 30 IR two stage that’s now going 950 rpms, almost double what it was with the slipping belts. With a 13 HP Honda motor. I might have more than I need and lower the Wide Open speed on the motor. But don’t know how to gauge the CFMs. Anyway, if anyone has an opinion on which does a better job, the efficiency or the HVLP GPG, I’d much appreciate it.
I couldn’t open the first link



Top Contributor
Posts: 6217
Joined: Tue Sep 16, 2008 1:17 pm
Location: Pahrump NV.
Country:
USA
PostPosted: Tue Jul 06, 2021 4:50 pm
What Model number IR type 30 Pump is that?
I have a IR type 30 Myself model 7100 more than enough air to paint with!
Dennis B.
A&P Mechanic, FCC General radio Telephone Operator
Line Maintenance A&P Mechanic and MOC Tech specialist.



Settled In
Posts: 95
Joined: Thu Oct 01, 2020 4:45 pm

Country:
USA
PostPosted: Wed Jul 07, 2021 9:37 am
It’s a model 242-D8. I think it’s from the 89s maybe, not sure. I read somewhere that soon after the 242 they went to a bigger output, not sure if it was to a bigger pump or bigger motor, I’m thinking I must have enough air for the 16 CFMs now, as the needle on the pressure gauge is really moving fast now.



Top Contributor
Posts: 6217
Joined: Tue Sep 16, 2008 1:17 pm
Location: Pahrump NV.
Country:
USA
PostPosted: Wed Jul 07, 2021 2:29 pm
I found one web sight saying the model 242 was 17 cfm it should work just fine.
You can put a Electric motor on it if you wanted too.
Maybe even spin it a bit faster depends on pulley size.
Faster more heat more air = shorter life.
Dennis B.
A&P Mechanic, FCC General radio Telephone Operator
Line Maintenance A&P Mechanic and MOC Tech specialist.



Settled In
Posts: 95
Joined: Thu Oct 01, 2020 4:45 pm

Country:
USA
PostPosted: Wed Jul 07, 2021 4:16 pm
Thanks, I took the 38 amp 110V motor off because I didn’t have that much electricity, put the IR 6” pulley on the 13 HP Honda gas I put on. Which has two speeds now, idle being 1500 rpm, fast being 2500. The pulleys are 2.5:1. Of course the electric motor was 1700 rpm. So I’ve increased the speed on the pump from 550 rpm to 950. I know it’s not ideal, IR says 1050 should be tops. So If I can’t figure out how to slow the motor I’ll just get a 5” pulley for it. I have a hand held tachometer that’s got a rubber tip you hold in the center of the shaft



Top Contributor
Posts: 6217
Joined: Tue Sep 16, 2008 1:17 pm
Location: Pahrump NV.
Country:
USA
PostPosted: Thu Jul 08, 2021 9:45 am
I wouldn't want to spin it faster than 2000 with the electric motor with correct size pulley.
That 17cfm was with the electric motor with correct size pulley.
Both of these pumps lubricate with Splash oil I beleave ?
Faster isnt always good, Like I said faster more heat shorter life.

My IR Type 30 is a Model 7100 considerably larger than yours I have a True 5 hp single phase motor driving it with a 4-4.5" pulley, BY IR standards the smallest motor I should have on it is a 10hp, max a 15hp.
My little 5hp struggles especially at start when cold but after it starts for the first time its good, When I start it first thing in morning I have to pull the unload-er valve but after its up to running at speed Its good to go for the full day no problems its just a cold start.
I have had to change the capacitors on it both the running and the Start already.
That little 5hp don't like that big pump not at all! But has been doing the job now for a long time. It gives me all the air I need.
I will be getting a 10hp for it one of these days.
Dennis B.
A&P Mechanic, FCC General radio Telephone Operator
Line Maintenance A&P Mechanic and MOC Tech specialist.



Settled In
Posts: 95
Joined: Thu Oct 01, 2020 4:45 pm

Country:
USA
PostPosted: Sat Jul 10, 2021 7:18 pm
Thanks I’ll remember the unloader trick. My 13. HP Honda starts first pull every time but hasn’t had a winter yet. Yes it’s best to keep the pump at 5 or 600 rpm, and I won’t go over the 950. I’m using the original pulleys but the gas motor runs at 2500 rpm whereas the electric it came with was 1725. That’s how the pump got to 950. adjusted the gas motor down to 2250 which brought the pump down to about 850. Which I think is still a little high, so I’m looking into slowing the motor or getting a 5” pulley on the motor. I used the pilot relief valve and cable throttle control kit from Conrader. The electric motor IR had used on it was called a 5 HP but it was the size of a ten horse. It was 110/220 volt. Used 19 amps on 220 and 38 amps on 110. I don’t pay much attention to horsepower, kind of an arbitrary thing. I’m hoping to get time this winter to rebuild the pump and increase my CFMs.

Return to Tools and Supplies

Who is online

Users browsing this forum: No registered users and 59 guests