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compressor

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: pat123 » Sat Aug 11, 2007 12:31 pm

i have been trying to decide on buying an air compressor or sticking with my bike pump. i want one that can refill my chamber in like 10 seconds up to about 100 psi how much would one of these cost? my chamber is 30 in and 2 in diameter
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Unread postAuthor: spud yeti » Sat Aug 11, 2007 12:34 pm

i want one that can refill my chamber in like 10 seconds up to about 100 psi how much would one of these cost? my chamber is 30 in and 2 in diameter


If you get a compressor, what you should do is create a "storage chamber" where the compressor feeds a fairly large chamber that then runs to your gun. This allows the compressor to be smaller and increases your refill time.

If you buy one, dont buy the cheapest you can get, remember, you get what you pay for :wink:
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really good quote/phrase here
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Unread postAuthor: pyrogeek » Sat Aug 11, 2007 1:21 pm

Buy a belt driven unit, that way the pump is lubricated with oil. The direct drive ones are cheaper and quieter, but won't last as long.

Get as big of one as you can afford. My dad's 3HP one (a belt driven unit from like the 60s) needs a lot of time to refill when using air grinders and other demanding tools. If you can only afford a smaller one though, you can do a couple things. Either attatch an extra chamber to hold compressed air, so you can refill without having to kick the compressor on. Or, detatch the line going to the tank to pressurize it, and connect it directly to your gun. You could replumb this though, with a T-fitting and ball valve to be able to choose between being directly connected or to pressurize the tank.

Believe me, get a compressor. Once you have one, you won't go back to a bike pump, plus you can get all kinds of air tools pretty cheap to do all kinds of work. As for the cost, expect to spend a good $300 or more for a decent one. But, if taken care for, it should last a LONG TIME! My dad's has lasted a good 30 years at least, and it was just a Sears one he bought for like $200 back in the day.
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Unread postAuthor: potatoflinger » Sat Aug 11, 2007 3:21 pm

pyrogeek wrote: My dad's has lasted a good 30 years at least, and it was just a Sears one he bought for like $200 back in the day.

You haven't had any trouble with rust? One of my relatives had a farm, with a huge compressor (160 gal.) but they never drained it and it rusted a hole through the bottom. I wish they still had one that big, you could run a bbmg forever with one of those things!
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Unread postAuthor: noob of noobs » Sat Aug 11, 2007 3:23 pm

Your demands demand an air compressor. Unless you have a tiny chamber on a tiny gun, compressors are much faster and more practical. Just make sure to get a good one, and be sure to take good care of it.
However, if you need something small and portable, or you don't have a power source (like me) get a bike pump.
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Unread postAuthor: hi » Sat Aug 11, 2007 3:38 pm

craftsman makes good tools, pretty much anything over $200 will work well.

ps- a 30x2'' chamber will be filled to 100 psi in less than 5 seconds with a quick release.
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you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
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Unread postAuthor: randompkguy » Sat Aug 11, 2007 5:44 pm

You could get a co2 setup from Robert's oxygen, with a 0-300 psi regulator and hose...might even work for tools too.
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Unread postAuthor: noob of noobs » Sun Aug 12, 2007 4:56 pm

But with CO2 don't you have to keep buying new cartridges? Doesn't sound too convenient to me if you're already paying for ammo on a thin budget...
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Unread postAuthor: Pete Zaria » Sun Aug 12, 2007 4:58 pm

@noob of noobs,

I assume randompkguy was talking about using paintball-type CO2 tanks, not the little disposable airgun cartridges.

Peace,
Pete Zaria.
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Unread postAuthor: randompkguy » Sun Aug 12, 2007 8:49 pm

no..even bigger, I'm talking about welding gas tanks....fills with c02 cost like 10 dollars for a 20 cubic foot tank, and that will fill your cannon up maaaannny times...and the initial setup shouldn't cost more that 150 watermelons....
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Unread postAuthor: hi » Sun Aug 12, 2007 8:54 pm

the whole idea of having an air compressor is that all you have to buy is the compressor and your done.

no matter what kind of co2 you have, you have to fill it up, which costs money and time.

by the time you have a proper co2 set up and tank, you are paying the same for a compressor, but you have to keep paying for co2, which for people like me is very incovinent because i have to drive 35 miles to get it where as i could just plug in my compressor and im ready in two minutes. i really think getting a compressor is better than co2 if you are just shooting in your back yard.
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Unread postAuthor: noob of noobs » Sun Aug 12, 2007 9:21 pm

Still though, CO2 might be better if you need portability. I know that for people like me who live in the suburbs, you can't just go toting a compressor around to the nearest field if you don't have a car. Heh, I can't even find a freakin' field ever since I moved up to sprinkler valves that isn't a cemetery, golf course, or forest preserve here around Chicago... :roll:
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Unread postAuthor: pat123 » Mon Aug 13, 2007 3:34 pm

how many shots will i get out of a 10 gallon air tank
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Unread postAuthor: pyrogeek » Mon Aug 13, 2007 11:18 pm

potatoflinger wrote:
pyrogeek wrote: My dad's has lasted a good 30 years at least, and it was just a Sears one he bought for like $200 back in the day.

You haven't had any trouble with rust? One of my relatives had a farm, with a huge compressor (160 gal.) but they never drained it and it rusted a hole through the bottom. I wish they still had one that big, you could run a bbmg forever with one of those things!


Nope, not a problem. The pressure valve thing that kicks the motor back on has been replaced a couple times, but that's it. It doesn't get used real often, and in the last couple years I've been the only one to actually do any work in the garage using it at all, besides filling tires.

Also, CO2 is not sold by cubic feet. They sell it by weight. So a tank the same size as a 20cu ft nitrogen tank may contain 10lbs of CO2. The cost to fill the tanks ranges. I have a 20lb it's like $10 at one place for a regular welding tank that supplies gas, and like $25 for the same tank if I want to get one with a dip tube, which supplies liquid CO2 (it's at a totally different shop though.

And you cannot figure how many shots you would get from a 10 gallon tank without knowing how high you pressurized that tank, how big of a chamber your gun has, how much air is left after being shot, and what pressure you run it at, along with how low of pressure you are willing to use.

randompkguy, there are plenty of options for using CO2 like that. There are variable pressure regulators (not sure on prices) (don't use a welding regulator, they have too low of a flow). There are set pressure ones (run about $100), that drop it to like 100, or 150, etc. That could have a air tool regulator added on to the outlet for $20 for one from Harbor freight. They sell tanks like that for offroading, to use for airing up tires. And you can of course use them to power air tools. There are now Cobalt brand air tools at Lowes that use a paintball CO2 tank and a regulator to power them. Of course, you could get the right nut and stem and adapt it to use a Palmer or Evil Detonator regulator. That would probably require a bit more work, but it would certainly work fine for most anything.
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Unread postAuthor: darkmilk » Tue Aug 14, 2007 12:55 am

http://www.lowes.com/lowes/lkn?action=p ... lpage=none

what about this, it uses paint ball co2 tanks wich you can by online for15 bucks(large ones 20 oz) its has a psi up to 120 and is adjustable plus tanks can be refiled for free at paintball fields or 2or3 bucks at sportmart
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