A different pvc question

[vrinner]

So I am building a fuel injector tester/cleaner. I have the basic electronics built and seems to basically work but I would like to make a small bottle, about 2-4” in diameter x 8-12” tall to fill with carb cleaner and pressurize to 40psi to be shot into the injector. I tested it with a can of carb cleaner but it sprays extra fluid everywhere.

Would 4” black pvc by about 10” tall with glued end caps be able to hold 40psi?

Here is a pic of my first shot at the rig. I used all vintage parts left over from my Dad’s garage, the super thin stainless, the switches, terminal block and light, the baby food jar and even the wire, connectors and old spool of solder. Also found a can of old nuts and bolt that I used to dimple the thin sheet metal to try and make it stronger.

 

[vrinner]

Here is a link to the leaky test fixture I’m trying to correct.

https://1drv.ms/v/s!ArX1fX5b6pTMtAwYfiZfuiBKuVru

 

[SGKent]

I use a PVC tube to pre-lube some motors I build. However oil and carb cleaner are two different things. Carb Cleaner is similar to the chemicals used to soften PVC to glue it so I would say no, make your tool out of aluminum or steel tubing. I might even run aluminum or steel line to the injector manifold unless there is a fuel hose rated for the chemicals in the carb cleaner. Maybe Gates barricade might work. have to look into it. Just remember that if it were to rupture under pressure, that carb cleaner will make a nice mist instantly that could do more than create a small ****.

 

[The Cobbler]

drainage PVC or ABS is not engineered for that kind of pressure . 40 psi is a lot.
get a small pressure tank from a compressor or something else

 

[vrinner]

Didn’t think about the effects of the chemicals I would be using. That makes total sense to stay way from PVC.

I’m guessing steel or copper would be fine then. Looks like 4” steel and end caps isn’t too pricy but copper...geese that gets expensive for the caps alone.

I thought about taking an old benzine gas tank and using it but wasn’t sure.

Are there small tanks out there somewhere to purchase? I’m thinking about 16oz would be plenty.

 

[The Cobbler]

go get a threaded 1-1/2 " schedule 40 black pipe a foot long, a couple of caps and drill & tap one the size you need for outlet

 

[mc4life27]

Didn’t think about the effects of the chemicals I would be using. That makes total sense to stay way from PVC.

I’m guessing steel or copper would be fine then. Looks like 4” steel and end caps isn’t too pricy but copper...geese that gets expensive for the caps alone.

I thought about taking an old benzine gas tank and using it but wasn’t sure.

Are there small tanks out there somewhere to purchase? I’m thinking about 16oz would be plenty.

Look into Rc car tanks or maybe like some exhaust pipes for Rc cars or planes or boats. Maybe just a thought they maybe cheap enough may need to look at like 1:4 or 1:6 scale maybe? Or why about just some regular aluminum pipe and have caps welded and or threaded on the ends? Yeah pvc and carb no good. Plus like someone said if your doing it for while the carb is on the car and running that maybe a fire just waiting to happen.


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[matt_i]

If your "tank" can be 42" long you can make it out of a standpipe of 1" Cu to fit 16 fl. oz.

Then your endcaps become easy soft-solder jobs and you can use std pipe fittings from there.

 

[Thunderpigeon]

Have you considered something like this:

https://www.amazon.com/dp/B0002JMEQW/?tag=atomicindus08-20

 

[metlmunchr]

https://www.amazon.com/dp/B005POGY74/?tag=atomicindus08-20

Sure shot sprayers have been around since long before aerosol spray cans became common. The spray tip is removable so you could adapt a hose connector or whatever other fitting as necessary. Commonly used for spraying solvents. I've got one that's at least 50 years old and it still works as new.

 

[vrinner]

Those flush systems is kind of what I was thinking about...thanks for the links.

Considering I'm trying to "make" and the $40+ cost of those systems, I'll go check out what some large steel pipe, caps and connectors would run to keep it in the "home made" theme.

 

[MoonRise]

PVC and carb cleaner or other solvents would be a no-go from a chemical compatibility standpoint alone.

Never mind the pressure aspect.

Pressure vessels are NOT something to just jury-rig. Even 40 psi, done 'wrong', can cause damage and possible injury or death. No joke there.

How are you going to actually pressurize your pressure vessel? Liquid pressure only (via some sort of liquid pump, that then has to be compatible with the liquid) or are you going to use a pressurized air source to then pressurize the liquid?

Doable? Yes.

Trivial to do, safely? No.

 

[vrinner]

PVC and carb cleaner or other solvents would be a no-go from a chemical compatibility standpoint alone.

Never mind the pressure aspect.

Pressure vessels are NOT something to just jury-rig. Even 40 psi, done 'wrong', can cause damage and possible injury or death. No joke there.

How are you going to actually pressurize your pressure vessel? Liquid pressure only (via some sort of liquid pump, that then has to be compatible with the liquid) or are you going to use a pressurized air source to then pressurize the liquid?

Doable? Yes.

Trivial to do, safely? No.

Yeah...I've thought about that. Especially as I'm searching for pipes, pressure capacity and such I feel like the FBI/ATF is going to come raid my house suspecting me of trying to make pipe bombs!

I was thinking that the 2" steel pipe with caps, tap in a schrader valve at the top along with a pressure guage and tap in a valve at the bottom for the liquid to come out. Fill half way with fluid, pressurize to 40psi and have the wife in the other room with 911 on speed dial.

From what I've read 2" steel pipe has a working pressure rating of 650psi.

 

[Jure]

Delrin will work,but i'm not sure how a glued end caps will hold at 40 psi.

 

[GeoBruin]

Black pipe is crazy cheap and available in lots of pre-cut sizes that come threaded (*******). That said, some of the factory threads on Home Depot pipe are questionable. I've long thought about buying a set of dies so I could cut decent threads I know I can trust.

Also, it's thick enough (especially the caps) to give you plenty of room for tapping threads for your fittings and guages.

 

[sberry]

Price goes up larger than 2 inch in steel.

 

[metlmunchr]

In the piping business, sch 40 screwed pipe is regularly leak tested in the range of 200 psi at installation. The 40 psi you intend to use is totally safe. However, in figuring the cost of assembling a "tank" from a ****** and caps, you need to include the cost of a pair of 24" pipe wrenches (unless you already have them) as that's what it'll take to tighten 2" pipe joints to leak free condition.

 

[vrinner]

So here is a link to a video of the finished product and it actually works! I fill it up by first opening the valve, put in some cleaning fluid, close valve and pressurize to 40psi. Then put on injector and tighten clamp, open valve then hit the power button. I was able to get through 4 injectors with about a 10psi drop so it seems to work as needed but need to get some actual fuel line as the rubber hose bulges a bit under the pressure.

View media item 103137
https://1drv.ms/v/s!ArX1fX5b6pTMtENrnNuuEIRPJ8SX?e=8Mchaf

 

[travisn1]

Why do you need the pressure vessel? Why not a reservoir and fuel pump? Use a corvette filter regulator so you have a return back to the tank and a constant 55 psi. Then you never have to mess with unscrewing and sealing things, just top off your fuel tank with new cleaner.

For 300 bucks you can have a legit setup.

Fuel cell: https://www.ebay.com/itm/2-5-Gallon...el-Cell-Tank-Level-Sender-Silver/223985322398

Filter/regulator with an6 fittings: https://www.ebay.com/itm/EFI-or-LS-...-w-6AN-fittings-Kit-C5-Corvette/184052045099?

fuel pump with an6 fittings: https://www.ebay.com/itm/140GPH-Ele...p-Hotrod-Carb-setup-AN6-Fittings/322794222207

two AN 10 to 6 fittings for the tank: https://www.ebay.com/itm/Earls-AT98...emale-to-6-AN-Male-Flare-Reducer/274203053693

Hoses/fittings: https://www.ebay.com/itm/6AN-20Feet...10PCS-Push-Lock-Fitting-Hose-End/362367821707

Plus you can use your control system to control the pump if you want.


More googling later...

Already done for less: https://www.ebay.com/itm/AUTOOL-CT1...-Injector-Cleaner-Tester-Machine/172847043836

Another example of what you are trying to do already:

 

[vrinner]

Why do you need the pressure vessel? Why not a reservoir and fuel pump? Use a corvette filter regulator so you have a return back to the tank and a constant 55 psi. Then you never have to mess with unscrewing and sealing things, just top off your fuel tank with new cleaner.

For 300 bucks you can have a legit setup.

Fuel cell: https://www.ebay.com/itm/2-5-Gallon...el-Cell-Tank-Level-Sender-Silver/223985322398

Filter/regulator with an6 fittings: https://www.ebay.com/itm/EFI-or-LS-...-w-6AN-fittings-Kit-C5-Corvette/184052045099?

fuel pump with an6 fittings: https://www.ebay.com/itm/140GPH-Ele...p-Hotrod-Carb-setup-AN6-Fittings/322794222207

two AN 10 to 6 fittings for the tank: https://www.ebay.com/itm/Earls-AT98...emale-to-6-AN-Male-Flare-Reducer/274203053693

Hoses/fittings: https://www.ebay.com/itm/6AN-20Feet...10PCS-Push-Lock-Fitting-Hose-End/362367821707

Plus you can use your control system to control the pump if you want.


More googling later...

Already done for less: https://www.ebay.com/itm/AUTOOL-CT1...-Injector-Cleaner-Tester-Machine/172847043836

Another example of what you are trying to do already:

First...thanks for the suggestions and certainly good ways to go but with the exception of the pipe, caps and valve, all the other stuff I already had laying around so it probably only cost me about 20 bucks to make. Plus this is a very rarely used thing for me so those $300+ pro setups are way overkill for what I was trying to do (although I do dig new tools too).

Also that link to the homemade one is the same video I first saw to get the idea to build my own.

Thanks everyone for their input!