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Lower HPA Output PSI

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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Lower HPA Output PSI

Unread postAuthor: palanit » Fri Jul 13, 2012 11:41 am

I am going to get an hpa tank to use on my gun. However the regulators that come with tanks only regulate down to around 800 psi and I want to regulate between 0-300 psi. Mainly because this will allow me to get more shots and you can't really find any valves that can sustain that high of pressure. Does anyone know of any solutions for my problem. I don't want to buy a palmer regulator because they are too much money. I am looking for a cheap regulator or cheap mod to the existing regulator on the hpa tank. Thanks.
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Unread postAuthor: wyz2285 » Fri Jul 13, 2012 12:13 pm

Search, in the "How to" data base :roll:
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: palanit » Fri Jul 13, 2012 12:34 pm

yes I have and yes I've seen your video. I just wanted to know if anyone has done any mods to the attached regulator instead of buying another one.
Edit:
http://www.ebay.com/itm/paintball-air-N2-regulator-HPA-3000-psi-NEW-/280919649963?pt=LH_DefaultDomain_0&hash=item41681daeab
how is this one looking, the only problem i am seeing with it is that I'm not seeing the 2 screws used for removing it. what do you think wiz
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Unread postAuthor: Goats spudz » Fri Jul 13, 2012 12:54 pm

palanit wrote:yes I have and yes I've seen your video. I just wanted to know if anyone has done any mods to the attached regulator instead of buying another one.
Edit:
http://www.ebay.com/itm/paintball-air-N2-regulator-HPA-3000-psi-NEW-/280919649963?pt=LH_DefaultDomain_0&hash=item41681daeab
how is this one looking, the only problem i am seeing with it is that I'm not seeing the 2 screws used for removing it. what do you think wiz
It may not have set screws, there only used to stop you accidently unscrewing the regulator, There are lots of tutorials on how to lower the pressure of your reg, Wyz video is a good example.
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Unread postAuthor: wyz2285 » Fri Jul 13, 2012 1:07 pm

It will work and it probably has screws, just not visible in the picture. They basiclly are all the same.
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: palanit » Fri Jul 13, 2012 1:47 pm

so if i buy this regulator, would I replace the one that comes with the tank or just add it on with it.
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Unread postAuthor: Goats spudz » Fri Jul 13, 2012 3:15 pm

palanit wrote:so if i buy this regulator, would I replace the one that comes with the tank or just add it on with it.
WHat? why can't you just use the one on the tank, never mind yes you would.
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Unread postAuthor: palanit » Fri Jul 13, 2012 3:19 pm

So can you mod the regulator that comes with the tank or not.
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Unread postAuthor: Gippeto » Fri Jul 13, 2012 4:20 pm

Of course you can.

Where the potential for problems comes in, is if "things" are designed for low pressure and the reg fails (it does happen) and those "things" are suddenly exposed to the full pressure required to burst the safety disc...usually 1800psi.

Ask yourself "What's going to go first...the disc...or "things".

Just my .02
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Unread postAuthor: palanit » Fri Jul 13, 2012 4:25 pm

What do you suggest I do to prevent this. Also I am going to get a 48 ci 3000 psi hpa tank should I get the ninja aluminum n2 or an empire nitrogen n2. What do you guys think I should get.
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Unread postAuthor: beastmode986 » Fri Jul 13, 2012 9:36 pm

when i used to play paintball my 4500 psi tank had a very strong spring in it not the shims you see in wyzs video however most do have shims but if you run across one with a spring just add a weaker like in wyz's video
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Unread postAuthor: Gippeto » Fri Jul 13, 2012 9:59 pm

A second regulator adds redundancy...highly unlikely that both regs will fail...not impossible, just highly unlikely.

If you're only wanting 300psi, you could use co2 and a regulator.

The room temp vapour pressure of co2 is lower...decreasing the level of risk should the reg fail.

CO2 is usually easier to get than hpa refills...unless you have a handy paintball field of course.

A co2 bottle will provide MANY more shots of a given volume and pressure on account of being stored as a liquid.
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Unread postAuthor: palanit » Fri Jul 13, 2012 10:35 pm

The reasons why I wanted hpa was because it is cheaper (I mean the price of the tank and setup) and I wouldn't have to worry about freezing valves. Would I really get that much more shots. How many ounces of co2 would equal to a 48 ci hpa tank
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Unread postAuthor: Goats spudz » Sat Jul 14, 2012 7:16 am

Image
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Unread postAuthor: Gippeto » Sat Jul 14, 2012 9:23 am

:lol:


Seriously...High pressure gases are not to be trifled with. Your desire for "inexpensive" isn't unusual, but ask yourself if the risk of injury is worth the few dollars saved by taking a short cut. Using high pressure SAFELY is going to cost you some money...that's the simple truth. The regulator on my N2 setup retails around the $800mark...properly rated hoses, fittings and valves bring the price of admission higher....the Palmers reg is a bargain. :lol:

As for the valve freezing up...I wouldn't worry too much about that unless your rate of fire was very high.

Roughly similar in size to a 48/3000 tank and easy to find is a 20oz co2 tank.

1g of liquid co2 = 33.9in2 @ 1 Atm (14.7PSI)

20oz =567grams so we have 19221.3 in2@ 1 Atm

1Atm is 14.7psi and we need to convert 300psi to atm...300/14.7psi= 20.4Atm

Divide the volume by 20.4Atm...19221.3/20.4=942.2 in3 @ 300psi

Do an equivalent for the 48/3000....48in3 * 3000psi...144000 and then divide by the outlet pressure (300psi)

144000/300 =480 in3 @ 300psi

Now we're comparing two volumes of gases at the same pressure...

Is 942 in3 not substantially more volume than 480 in3 ?


Aside...Goatz...yer chuck key better not be left in yer chuck...or I'll be givin ya'll hell. :wink:
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