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Pesticide Sprayer Tank

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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Pesticide Sprayer Tank

Unread postAuthor: daberno123 » Thu Dec 20, 2007 6:03 pm

I found this tank in my basement and i was wondering what pressure it could stand. I used the attached hand pump to get it up to 45 psi before the safety valve popped off. It is surprisingly light and holds 3.5 gallons. I was thinking about using it in a backpack mounted laouncher because it is so light. I'm hoping I'll be able to bet it up to 100 psi.
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Unread postAuthor: bigbob12345 » Thu Dec 20, 2007 6:11 pm

Is it plastic or metal. If its metal its definatly safe for 100psi but if its plastic I dont know it depends on a lot of things how much pressure it could hold.It looks plastic to me but Im not sure. ask some more experienced members they should be able to tell you
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Unread postAuthor: daberno123 » Thu Dec 20, 2007 6:35 pm

It is plastic not metal thats why I'm asking
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Unread postAuthor: Maniac » Thu Dec 20, 2007 7:18 pm

whats the pressure gauge go up to on it
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Unread postAuthor: cwazy1 » Thu Dec 20, 2007 9:27 pm

using that as a fill resovour would be a better idea, because you would need a HUGE barrel to get max efficienct out of that, just use that to fill another chamber and you'll get multiple shots out of one fill.
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Unread postAuthor: daberno123 » Thu Dec 20, 2007 9:38 pm

that pressure gauge wasn't part of the tank i just screwed it on when I was testing the psi with the attached hand pump. Any estimates on the max psi? I might go with cwazy1s idea and use it for a fill resevoir.
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Unread postAuthor: cwazy1 » Thu Dec 20, 2007 9:44 pm

personally, i wouldnt use it over 80psi, and even at that pressure, i would put it in the backpack or what ever your going to strap to your back and then fill it while its in something so 1, the sound is muffled and 2, no flying shrapnel. lol

just be careful for the first couple times you fill, also watch the tank as it will prolly bulge, so just dont be dumb and when it starts to bulge, i would stop pumping. ...dont drop it btw..hahahha :wink:
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Unread postAuthor: daberno123 » Thu Dec 20, 2007 9:50 pm

yeah im not so keen on strapping something to my back something that may explode. Plastic shards in my vertebrate would do nothing but make pretty X-Rays when im in the hospital. I might just use it as a fill reservoir up to like 60 psi. I'm pretty sure the threads that the hand pump goes into are NPT 1.5"
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Unread postAuthor: bigbob12345 » Thu Dec 20, 2007 10:10 pm

If I were you since you have no idea on the pressure rating just find another tank that would be safer and use that but if you really want to use that Id suggest not going above 60-65psi and do you even know what material the tank is made from
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Unread postAuthor: daberno123 » Thu Dec 20, 2007 10:21 pm

I have no idea what kind of material it is made from. That is one of the reasons i posted this
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Unread postAuthor: TurboSuper » Thu Dec 20, 2007 11:04 pm

I'm going to go out on a limb here and say that if the safety valve popped off at 45 PSI then it's only designed to handle up to 45PSI.
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Unread postAuthor: Killjoy » Sat Dec 22, 2007 2:58 am

I'm going to go out on a limb here and say that if the safety valve popped off at 45 PSI then it's only designed to handle up to 45PSI.


Good point, but it is more likely that the tank can withstand higher pressure, but it has the pop off because 45 psi is the max, designed for, operationg pressure. I'd say it would probably burst at around 100 psi or so, so If you keep it at 60 psi you should be alright. But always test these things before implementing them.
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Unread postAuthor: cenzo188 » Mon Dec 24, 2007 5:04 pm

Do you know who manufactured it, because if you do you can call and ask for the results of the destructive tests. Make up some excuse, don't say "im building a cannon to shoot potatoes". if the saftey valve goes to 45 psi, that is probably more than its NOP (normal operating pressure) by maybe 5 psi. So at 40 or 45 psi it is safe indefinatley, even if dropped. if you do get the results of a destructive test, go 10-20 psi lower and dont drop it. I still wouldnt feel comfortable strapping it to my back.
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