Painting your 40, what gun and compressor post pics of results

[broth9640]

I posted this in the paint forum, but haven't had a response. What setup is everyone using?

Ok so here is my problem. I am almost ready to paint, but I need an air compressor. I have been shopping around and the only ones that will supply the cfm's that my gun requires (13 cfm) are 230V. I am currently renting the house that I live in and there is no 230 in the garage. My question is , can I get away with a compressor that has less cfm's that runs on 115v. Say something like a husky 30gal 2hp with 5.5cfm's at 90 psi? I have a starting line HVLP gun that says. 30psi inlet pressure delivers
10psi air cap pressure at
13 cfm air volume
air inlet 1/4 nps

Or am I screwed?

Anyone else use this gun and if so with what compressor. Can you post your results

 

[kurtnkegger]

I think if you allow the compressor to recover, there wouldn't be problems. I doubt you would be painting so fast, your compressor couldn't keep up. 5.5 CFM's at 90...but what is the volume output at lower pressures? I'm definately talking out of school here, as I've never used a compressor for painting, but recovery, and air storage are key for any application.

 

[Michael Hanson]

Just put in a 220 30 amp breaker. Take it out after you paint. Mike

 

[broth9640]

Electrician said the house panel wouldn't handle it. I guess its an old panel and the garage is detached without a panel. So its a few grand to update the house panel and install a panel in the garage.

 

[Michael Hanson]

If you have an ac or electric dryer connection use that and rent a 220 cord. MIke

 

[Pin_Head]

5.5 CFM @ 90 PSI is 11 CFM @ 45 PSI, so you should be OK. You need a dryer to keep water out of the air. A coil of copper tube chilled by dry ice works fine.

 

[broth9640]

do you have a pic of that set up? run the coil through a large coffee can filled with ice then through a seperator then to the gun? How do you derive 11 CFM's I don't think it doubles like that , but I could be wrong.

 

[broth9640]

here is an example I found from Husky: Looks like 10.2 at 90psi and only increased to 11.5 at 40psi

This compressor offers a solid cast iron, twin cylinder compressor pump for extreme durability. It also offers 135 PSI maximum pressure and air delivery 11.5/10.2 SCFM @ 40/90 PSI. It has a space saving vertical design that is perfect for your home, garage, or work shop.

* Powerful 3.2 running HP motor provides significant air to multiple power tools
* Delivers 11.5 SCFM at 40 psi and 10.2 SCFM at 90 psi
* 135 PSI maximum pressure
* Cast-iron, oil-lubricated pump has a traditional design that offers quiet performance
* Twin-cylinder pump delivers 1070 RPM
* Protective belt guard enhances your safety
* Steel tank is durable
* High-quality oversized gauges are easy to read
* Includes a changeable automotive-style air filter
* Over 35 percent quieter and 60 degrees cooler than aluminum pumps with cast iron sleeves
* For replacement parts use link http://powerparts.homedepot.comlchap.asp?ID=5280
* MFG Brand Name : Husky
* MFG Model # : VT6314
* MFG Part # : VT6314

 

[broth9640]

I just looked at the gun again and it looks like its 13CFM's at 10psi. Kinda annoying because no one rates the compressor at this psi.

 

[Pin_Head]

How do you derive 11 CFM's I don't think it doubles like that , but I could be wrong.

Boyle's law. Pressure and volume are inversely related, so PV1=PV2. When pressure is halved, volume doubles in a closed system.

The air dryer is simple: Put a coil of copper tube that has pipe or QD fittings for hose connections in an ice chest and cover with dry ice (not water ice).

 

[broth9640]

Anyone out there painted with a smaller compressor that cares to chime in? Pics

 

[edwjmcgrath]

http://www.physicsforums.com/archive/index.php/t-155966.html

 

[kurtnkegger]

I still think you could get a separate storage tank for less than running an electric upgrade, and have ample air to run your gun. The drier Pinhead suggests is a great idea, and placed before the extra storage tank would be perfect.

 

[broth9640]

Calculating cubic ft/ min and PSI [Archive] - Physics Forums

Not sure if I have it all straight after reading through that, but it does sound like a single stage compressor will double scfm's as pressure decreases by half. the whole ACFM vs SCFM gets things even more skewed. I think the bottom line is that scfm is a single stage compressor is a measure of its intake and acfm is its actual outflow (usually higher than the rated scfm) . so if I need 13 scfm for my tool if I can get close to that on my compressor then it will work as long as I don't have the trigger puled 100% of the time

 

[FJsnoozer]

I'm spending much less by preparing everything first and renting a paint booth.

I should be painting this Sunday. I have a gun, but can rent theirs for 15 bucks.

 

[broth9640]

Dude genius! Who rents booths?

 

[misterpepper]

I've started painting mine using a 4.9cfm gun and a 3.? cfm compressor. It's a little 3 gal Craftsman, so not a lot of reserve when I do start pulling the trigger. It's not enough, unless I really make a concious effort to go sloooow. The paint is basically Rustoleum though, so I just have to get it on without runs. The compressor was only like $100 so I'm actually considering buying a second and fitting both up to a secondary tank. That's at least a thought for running on 110V, and probably cost competitive with any 230V compressors.

 

[Roboosfj40s]

Not an expert by any means but I have painted a couple of old chevys years ago and a lot of heavy equipment as well as 210 pieces of military trucks, M151's Gammagoats water buffalos etc. etc. When I came back from Nam they asked us to paint from OD green to camo scheme at Ft. Bragg N.C. prior to discharge no formations or reporting lol! Any way as a rule of thumb 40-45 psi maintained through a dryer and filter worked wonders. I have also use the dryer plug and range plug with an extension cord suitable for the distance and amps for welders and air compressors. Me now? I would go for the Rental Idea. But that is just me

 

[mruff]

I will send the results of my paint job after using a craftsmen compressor and a ahrbor freight gun. You will be surprised. If you run out of air just let it recharge. Also considwr what your gun says it needs to operate would be if you were constantly holding the trigger in. Figure you paint in short burst and have reload time...

 

[bikersmurf]

Don't know if this helps, but here is an example of a home job.
https://forum.ih8mud.com/paint-body/388312-garage-paint-job-budget.html