Halftrack
Platinum Member
How about, put a valve stem on your tank of choice and recharge it with a small hand held air compressor. Most of those have a built in gage and are battery operated.
Actually doesn't matter the size. Any time any quantity of liquid propane is present at 90°F the pressure will be about 145 PSI. Increase the pressure and some of the gas will go back into liquid dropping the pressure. Decrease the pressure and some of the liquid will boil into gas restoring the pressure.According to the national standards publication NFPA58, a propane tank with 20 pounds (5 Gal) of gas at 70°F would have a pressure of 145 psi; at 90°F
The 12 year (not 10) inspection regulation originates with DOT. "A propane tank which is transported." It can be reinspected for another 5 years. Many places that fill 20# propane bottles will not inspect, Costco for example. When 20# bottles cost $20 it used to cost $10 for an inspection. Haven't found a propane shop that will inspect since the COVID insanity.All this worry yet how many put 120 PSI in a 50 year old portable air tank? Who changes their air compressor tank every 10 years? The stresses are same, just air is not flammable.
Be safe and buy one of these. Strap it to your bucket, pallet forks, or 3ph mounted carryall. Buy a deep cycle battery and you’re good to go.I will admit to my total ignorance when it comes to pressurized storage containers and could use some help. I have had no luck trying to find answers to most of my questions on the net.
Here is an idea I have had for years and wondering if it can be safely pulled off. The goal would be to have a pressurized utility sprayer that I can carry around with me for spraying roundup etc. I am tired of pumping my 2-3 gallon sprayer every several minutes. I have a 5-gallon backpack model but once full I have a hard time getting it on/off by myself and it hurts my lower back as I walk around my 6 acres. I like the idea of a smaller, pressurized, hand held 2-3 gallon sprayer. I know they make battery powered units but I like to experiment & was wondering if an empty propane tank be repurposed (refilled with air) to provide the 10 PSI that I need? I do not think the high pressure paint-ball tanks is what I want as they are thousands of PSI and expensive.
I have long wanted to take an empty (small torch sized) 1-pound propane tank and refill it with air via my shop air compressor and try out my idea. I would attach a regulator to knock down the high pressure air down to ~10 PSI.
My 1st & most important question is what PSI can these small 1-pound propane tanks hold safely? The last thing I would want is to set my shop compressor too high & have a catastrophic failure due to too much pressure while refilling it. The next question would be where can I get a low-pressure regulator with a gauge so I can dial in the PSI into my 2-3 gallon sprayer.
I wonder how well these types of rechargeable speakers work and how much extra weight is involved compared to a pump tank sprayer?Battery powered hand sprayer
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We made bead cheaters that pop tires on the rim. Old propane bottles. 150 psi all day long.Awesome that you referenced a standard. Thank you. Do you by chance know the PSI for a standard 1-pound tank?