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Custom Pressure Regulator

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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Custom Pressure Regulator

Unread postAuthor: velocity3x » Sun Dec 13, 2009 7:16 am

While building my new cannon, I realized that I must build my own regulator as nothing exists with a high enough flow rate in that pressure output range.

The regulator case is 304 stainless
FOS @ 1000 psi=30 +/-
Output range = 0 - 1900psi
Internal orifice (smallest) .375" dia
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Last edited by velocity3x on Mon Dec 14, 2009 6:19 pm, edited 2 times in total.
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Unread postAuthor: POLAND_SPUD » Sun Dec 13, 2009 7:27 am

hmmm nice... now what about your LP regulator ? is it also custom made or is it just an off the shelf part ?

also what about the launcher itself ? I would really like to see the main valve...

EDIT
I've just converted volume... are you sure it's .39ft^ @ 1000psi? that's about 11 000 ccm @ 1000psi

so... did you calculate it in this way -> volume X pressure in bars = flow and then you added '@ 1000 psi' by a mistake or is it just a really large gun ?
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Last edited by POLAND_SPUD on Sun Dec 13, 2009 7:38 am, edited 1 time in total.
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Unread postAuthor: velocity3x » Sun Dec 13, 2009 7:35 am

POLAND_SPUD wrote:hmmm nice... now what about your LP regulator ? is it also custom made or is it just an off the shelf part ?


You lost me. What LP regulator? The only LP regulator I have is on my BBQ.

EDIT
I've just converted volume... are you sure it's .39ft^ @ 1000psi? that's about 11 000 ccm @ 1000psi

so... did you calculate it in this way -> volume X pressure in bars = flow and then you added '@ 1000 psi' by a mistake or is it just a really large gun ?


The tank size is .39^ft and at 1000psi that = 26.5^ft at 14.7 psi.
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Last edited by velocity3x on Sun Dec 13, 2009 7:48 am, edited 1 time in total.
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Unread postAuthor: Larda » Sun Dec 13, 2009 7:36 am

Nice work!
Are you going to share the plans for this regulator?
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Unread postAuthor: POLAND_SPUD » Sun Dec 13, 2009 7:41 am

lol sorry... I assume that LP has something to do with propane right ?
by LP reg I meant low pressure...

EDIT
26.5^ft at 14.7 psi
but that's 750 L... so about 11 L of air at ~70 atm... 10L chamber volume is huge by my standards - given the fact that it runs at > 1000 psi means that either the gun is optimized for highest power and is large or it's simply huge

How large is the gun ? and what do you use as a source of air ?
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Last edited by POLAND_SPUD on Sun Dec 13, 2009 8:01 am, edited 2 times in total.
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Unread postAuthor: velocity3x » Sun Dec 13, 2009 7:51 am

Larda wrote:Nice work!
Are you going to share the plans for this regulator?


Eventually, if anyone is interested.
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Unread postAuthor: velocity3x » Sun Dec 13, 2009 7:56 am

POLAND_SPUD wrote:lol sorry... I assume that LP has something to do with propane right ?
by LP reg I meant low pressure...

EDIT
26.5^ft at 14.7 psi
but that's 750 L
How large is the gun ? and what do you use as a source of air ?


Barrel is 1.251id x 72". I use industrial cylinder gas for the pressure source.
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Unread postAuthor: POLAND_SPUD » Sun Dec 13, 2009 8:05 am

so what about the main valve ? it's piloted/actuated using air at (relatively) low pressure, right ? I think I recall someone who mentioned that his gun regs air down to lower pressures for controlling the firing cycle
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Unread postAuthor: velocity3x » Sun Dec 13, 2009 8:23 am

POLAND_SPUD wrote:so what about the main valve ?
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Last edited by velocity3x on Wed Jan 13, 2010 11:49 am, edited 2 times in total.
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Unread postAuthor: Larda » Sun Dec 13, 2009 8:37 am

velocity3x wrote:
Larda wrote:Nice work!
Are you going to share the plans for this regulator?


Eventually, if anyone is interested.


I am interested. :)
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Unread postAuthor: velocity3x » Sun Dec 13, 2009 8:47 am

Good memory!
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Unread postAuthor: roboman » Sun Dec 13, 2009 11:23 am

By any chance, do you have the GCode for this? We have a Haas CNC lathe and mill at my high school, and I happen to need a high pressure regulator.
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Unread postAuthor: psycix » Sun Dec 13, 2009 11:59 am

Now that's a shiny regulator, good job!

I'm interested in the plans as well.
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Unread postAuthor: POLAND_SPUD » Sun Dec 13, 2009 12:14 pm

Good memory!

I now realize that you were referring to the low pressure (LP) regulator for the loading / firing cycles. It's off the shelf. I bought it from PALMER. I think it's called "Boulder"
well I was sure it was you but then when didn't know what I meant I begun to have doubts
:D

BTW, Didn't we discuss this project earlier? I mean, a couple of months ago?
I remember that someone wanted to build a scaled up paintball gun valve as the main valve but I can't find it in my PMs

well, anyway it seems to be the best pneumatic on this site - it deserves to be discussed in a separate thread (preferably with lots of damage videos and pics :twisted: )
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Last edited by POLAND_SPUD on Sun Dec 13, 2009 3:26 pm, edited 1 time in total.
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Unread postAuthor: velocity3x » Sun Dec 13, 2009 12:48 pm

POLAND_SPUD wrote:BTW, Didn't we discuss this project earlier? I mean, a couple of months ago?
I remember that someone wanted to build a scaled up paintball gun valve as the main valve but I can't find it in my PMs


No...it wasn't me. This unit is for 1.250 ball bearings
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