Special Ops Paintball: What is Fixed output pressure? - Special Ops Paintball

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#1 User is offline   pvt Johnson 

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Posted 20 May 2009 - 06:49 PM

I've been looking over air tanks and I keep reading about a "fixed output pressure". Specifically, I was shopping crossfire tanks (as I was told they are the best) and I saw that red tanks have a fixed output pressure of 800psi and the blue tanks have a set pressure of 450 psi. What is this and how does this affect my marker and the flight of my ball, and which would be best?
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#2 User is offline   Flippy the Wonder Bunny 

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Posted 20 May 2009 - 07:36 PM

It is the output pressure of the tank, tanks with red regs are high pressure and put out 850 psi. Tanks with blue regs are low pressure and have an output pressure of 450 psi. This means that when the air gets to your gun it is at 800 or 450 psi. Most guns can use high pressure, and only a few high end guns cannot. I am guessing that you will need a high pressure tank. But just to make sure, what kind of gun do you have?
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#3 User is offline   pvt Johnson 

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Posted 20 May 2009 - 07:41 PM

I am planning on buying a Proto SLG.
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#4 User is offline   Flippy the Wonder Bunny 

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Posted 20 May 2009 - 08:00 PM

Well then high pressure is exactly what you need.
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#5 User is offline   Florentine 

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Posted 20 May 2009 - 09:07 PM

View Postghost93, on May 20 2009, 11:00 PM, said:

Well then high pressure is exactly what you need.

But you can also use a low pressure tank on that gun, but if I recall correctly, it will have some shoot-down problems.
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#6 User is offline   slowerpig81 

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Posted 21 May 2009 - 05:26 PM

Yeah, unless you have an angel whatever who the hell cares get a HP output tank. The inline reg on each gun puts it at a pressure you want, but prior to the reg high pressure is better because you will not have any flow problems in the ASA and macroline.

As for tanks, crossfire is good, also check out ninja air, they have good tanks and regs at a good price.
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#7 User is offline   Florentine 

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Posted 21 May 2009 - 06:49 PM

Crossfires are good, but I have noticed that the regulators on the tanks are longer than ones found on Pure Energy.
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#8 User is offline   mtaylor 

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Posted 21 May 2009 - 07:17 PM

View PostFlorentine, on May 21 2009, 07:49 PM, said:

Crossfires are good, but I have noticed that the regulators on the tanks are longer than ones found on Pure Energy.


The quality on the crossfire regs are better.

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#9 User is offline   Florentine 

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Posted 21 May 2009 - 07:56 PM

View Postmtaylor, on May 21 2009, 10:17 PM, said:

View PostFlorentine, on May 21 2009, 07:49 PM, said:

Crossfires are good, but I have noticed that the regulators on the tanks are longer than ones found on Pure Energy.


The quality on the crossfire regs are better.

Yes I know. They are very high quality, just they are about 1/2" longer than a normal reg.
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#10 User is offline   mtaylor 

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Posted 21 May 2009 - 08:46 PM

View PostFlorentine, on May 21 2009, 08:56 PM, said:

View Postmtaylor, on May 21 2009, 10:17 PM, said:

View PostFlorentine, on May 21 2009, 07:49 PM, said:

Crossfires are good, but I have noticed that the regulators on the tanks are longer than ones found on Pure Energy.


The quality on the crossfire regs are better.

Yes I know. They are very high quality, just they are about 1/2" longer than a normal reg.


And heavy, being solid brass... but worth it ;)

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#11 User is offline   Florentine 

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Posted 22 May 2009 - 05:54 AM

View Postmtaylor, on May 21 2009, 11:46 PM, said:

View PostFlorentine, on May 21 2009, 08:56 PM, said:

View Postmtaylor, on May 21 2009, 10:17 PM, said:

View PostFlorentine, on May 21 2009, 07:49 PM, said:

Crossfires are good, but I have noticed that the regulators on the tanks are longer than ones found on Pure Energy.


The quality on the crossfire regs are better.

Yes I know. They are very high quality, just they are about 1/2" longer than a normal reg.


And heavy, being solid brass... but worth it :)

Very much so. I liked my crossfire when I had it, but it was dam heavy compared to my PE.
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#12 User is offline   apoc4lypse 

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Posted 22 May 2009 - 09:12 AM

Here's a slightly related question:

Say I had a low pressure marker. If I use a small, HP output 13/3000 tank on it and get around 135 shots at 850 PSI input pressure, about how many shots would I expect with the same tank on LP output (~500 PSI)? Around 50% more?
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#13 User is offline   Ciderbarrel 

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Posted 22 May 2009 - 12:37 PM

View Postapoc4lypse, on May 22 2009, 12:12 PM, said:

Here's a slightly related question:

Say I had a low pressure marker. If I use a small, HP output 13/3000 tank on it and get around 135 shots at 850 PSI input pressure, about how many shots would I expect with the same tank on LP output (~500 PSI)? Around 50% more?


It should be the same. You have the same volume of air under the same pressure (3000 psi) feeding into a reg to lower both (if needed) to the low pressure the marker need. One spits out that 3000 psi at 800, the other at 500, but it's the same amount of air coming out, just at different output pressures.

If you had a high pressure marker, you'd actually get less shots on the LP tank. The operating pressure of the marker would eventually be higher than the input pressure as you get down to "the bottom of the tank."

This post has been edited by Ciderbarrel: 22 May 2009 - 12:39 PM

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#14 User is offline   apoc4lypse 

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Posted 22 May 2009 - 08:00 PM

View PostCiderbarrel, on May 22 2009, 03:37 PM, said:

It should be the same. You have the same volume of air under the same pressure (3000 psi) feeding into a reg to lower both (if needed) to the low pressure the marker need. One spits out that 3000 psi at 800, the other at 500, but it's the same amount of air coming out, just at different output pressures.

If you had a high pressure marker, you'd actually get less shots on the LP tank. The operating pressure of the marker would eventually be higher than the input pressure as you get down to "the bottom of the tank."


Lower pressure means fewer molecules, right? So that means there's less of a drain on the main tank, even if it's the same volume, resulting in more shots. Which is why a 68/4500 has more shots than a 68/3000; same volume, but contents at a higher pressure and hence more molecules.

It makes sense to me, but when I get my tank, I'll try and compare the shot count between high and low pressure outputs (it's a Ninja 13/3000 so it's adjustable).
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#15 User is offline   Ciderbarrel 

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Posted 23 May 2009 - 05:19 AM

View Postapoc4lypse, on May 22 2009, 11:00 PM, said:

Lower pressure means fewer molecules, right? So that means there's less of a drain on the main tank, even if it's the same volume, resulting in more shots. Which is why a 68/4500 has more shots than a 68/3000; same volume, but contents at a higher pressure and hence more molecules.

It makes sense to me, but when I get my tank, I'll try and compare the shot count between high and low pressure outputs (it's a Ninja 13/3000 so it's adjustable).


I'm glad it makes sense to you, because it's over my head :(

I am a big fan of Mythbusters and just going out and experimenting vs endless debate as to what to expect. Let us know what your results are.
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