After reading through the first 4 results of that search, i'm going to use something originally designed to hold compressed air...

There's a semi boneyard here.... i'll start there...

 

I always used an air tank and check valve of of junk semi's. If you have a few to choose from there is lots of different size tanks and mounting systems.

 

yep, i got my tank of a KW. check valves are cheap enough at AirBagIt.com - Air Suspension Kits, Mini-Truck Parts, Sport Compact Parts! Airride, Airsprings, Towing Kits, Lambo Vertical Doors, Airbags.

 

These guys have all different DOT approved air brake tanks for any size or shape you want.
Trailer Parts Superstore - Air Brake Tanks

 

This one has a few nice features built in to it. The fitting on the bottom left is plumbed into the line between the head and a check valve and when the tank gets up to pressure it triggers and bleeds the pressure from the head. It also can be manually shut off and will work with any voltage, as it just opens the circuit when the pressure (adjustable) is reached. It's not that big, can be hidden easily and they don't fail very often.

 

So the same way mine is set up right now - pressure switches are nice for electric compressors, but with my york and hand throttle I can vary my engine speed to match my CFM usage and I don't really need the air tank unless I'm running the 600 lb-ft impact (which is also where having 3/8" T-couplers comes real nice). And since I mentioned the 3/8" couplers - use those instead of the regular 1/4" ones, along with 3/8" pressure hoses, this way the only choking point in the system is the air tool itself. I actually have two pressure hoses, one has the 3/8" couplers on both ends, the other has 1/4" couplers on both ends, and I also have a 3/8"-to-1/4" adapter, so I can deliver lots of CFM to the hoggy air tools like the aforementioned impact wrench and I can still plug in smaller 1/4"-port tools like die-grinders or even chucks for filling up tires. I can also plug the small-coupler hose into the large-coupler hose via that adapter, then I can reach stuff even further away...

Yup, that's exactly the kind of air tank I have, an old trailer brakes tank. I'll get my check valve new tho, I'm gonna hit the local Mack dealer tomorrow for it, I bet they have one of those things (3/8"-NPT valve) in stock there with my name on it, lol

 

i run 2 e compressors, 4cfm 200psi 100% duty cycle into a 5 gallon tank. 2 switches shutting off at 150 and 180psi. run nipples on 3 places to run air tools off of, oh and the twin 3 trumpet air horns and 2 3800lb 500psi airbags for the rear.

 

I got the 10ci york, which is capable of over 9cfm when redlined. If I run her at 2000 engine rpms my tank pressure don't even drop when I use the big impact 5-gallon tank as well. Blow-off valve is set to 115 psi, but my oil separator is good for up to 150, so I'll see if the Mack dealer has a 140 psi valve...

 

Another call to the same resource of mine earlier today produced the following result:
Unloader, Load Genie - Pneumatic Check Valves - Pneumatic System Components - Pneumatics & Hydraulics : Grainger Industrial Supply

Really his reply was go on Grainger and search for the load-genie unloader check-valve, and this is what I was able to produce on my own Is it going to work for you, do I win another cookie?

 

lay off the cookies, or you gonna get fat!!

 

I'm gonna owe her a lot of cookies....

 

Master Tom, that is highly unlikely - I am on my feet 6 days a week at work, it's an awesome exercise.

Actually that is not all that likely either - I think I have about exhausted my usefulness in this whole air compressors subject.

 

i wish i could say that. i drive a truck, so i sit on my asterisk all day.

 

Tom, did you see her profile page? I'm not sure you'd want to be doing what I think she does for a living But I know what you mean, I had a desk job for quite a few years, and ever since I dumped that and started turning wrenches semi-professionally I've been in much better physical shape. Altho I may be into your situation very soon, if I do take my buddy's uncle's offer - however, given the truck I'll be driving and where I'll be driving it, I think that my asterisk will be hovering in the air above the seat a whole lot more time than being well-planted on the seat cushion, and it is therefore my kidneys that will get the workout of a lifetime, lol.

Back on topic now, the only check valve the Mack dealer had in stock was some small 1/4" NPT thing made by Bendix that just looked way too restrictive, so I ordered a 3/8" valve made by Haldex from NAPA - same price but it looks like it will flow a whole lot more air, it will be here tomorrow - this is the valve in question, methinks it will solve my tank self-purging issue quite nicely:
KN23010 - Check Valve - Haldex product
Forgot to check if they have the 140-psi pop-valves tho, hopefully I'll remember tomorrow.

 

O.M.G. BUBBLEGUM!!!

your signature on your profile page had me gasping for air!!


and i used to tend bar back when i was but a Young lad. after i joined the police force, i realized it was more fun being a bouncer than serving.

but that all changed in 1982 when i broke my neck.
3 years later after i learned how to walk again, the only thing i could do was sit on my asterisk and drive, so i made a profession out of it rather than just sit on my butt and collect disability like so many others do .