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High Pressure Question

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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High Pressure Question

Unread postAuthor: AngryChauncey » Tue Oct 27, 2009 2:03 am

I've been reading some posts about using 500-600psi and i was wondering what you would use to get this sort of pressure. Is it just a HUGE air compressor?
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Unread postAuthor: qwerty » Tue Oct 27, 2009 2:06 am

A fridge compressor, Regulated co2, regulated HPA or a good homemade pump.

You could reach 600psi with any of those.
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Unread postAuthor: jackssmirkingrevenge » Tue Oct 27, 2009 2:53 am

It's all here, read up ;)
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Re: High Pressure Question

Unread postAuthor: jimmy101 » Tue Oct 27, 2009 10:25 am

AngryChauncey wrote:I've been reading some posts about using 500-600psi and i was wondering what you would use to get this sort of pressure. Is it just a HUGE air compressor?

The size of the compressor would be irrelevant. A minuscule sized compressor (small enough to hold in one hand) can easily get to thousands of PSI.

The size of the compressor mostly controls the volume of air it can move, not the maximum pressure.

A frig compressor is a pretty small device.

You could make a 1000 PSI compressor from small id pipe and a suitable piston. With a 1/8" cylinder it would take just ~12 pounds of force and a ~70:1 compression ratio to get to 1000 PSI.
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Re: High Pressure Question

Unread postAuthor: velocity3x » Tue Oct 27, 2009 10:37 am

I fire my newest cannon at 1000psi. I charge from unregulated industrial gas cylinders.
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Unread postAuthor: qwerty » Tue Oct 27, 2009 10:48 am

I fire my newest cannon at 1000psi. I charge from unregulated industrial gas cylinders.


I would sure like to see this :shock: unless your making it up.
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Unread postAuthor: velocity3x » Tue Oct 27, 2009 11:19 am

qwerty wrote:
I fire my newest cannon at 1000psi. I charge from unregulated industrial gas cylinders.


I would sure like to see this :shock: unless your making it up.


I assure you.....Not making it up, but....believe as you choose.
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Last edited by velocity3x on Wed Oct 28, 2009 12:00 pm, edited 1 time in total.
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Re: High Pressure Question

Unread postAuthor: Technician1002 » Tue Oct 27, 2009 11:42 am

AngryChauncey wrote:I've been reading some posts about using 500-600psi and i was wondering what you would use to get this sort of pressure. Is it just a HUGE air compressor?


Due to the efficiencies of how much air remains in a cylinder when the piston returns and how much the remaining air expands a limits the amount of new air that will enter an already partially full cylinder, high pressure compressors are often multi stage. A single stage compressor is rarely used at over 250 PSI. Some large shop compressors for 175 PSI are 2 stage. 200 PSI seems to be the general division range between single and multi stage compressors for air.

A 500 to 600 PSI compressor will most likely be a 2 stage. 3 stage is common above 700 PSI. Paintball and SCUBA compressors are most often triple stage with a rare 4 stage.
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Unread postAuthor: qwerty » Tue Oct 27, 2009 12:43 pm

I assure you.....Not making it up, but....believe as you choose.


Sounds promising :shock: :) when will you put it on the forums?
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Unread postAuthor: twizi » Tue Oct 27, 2009 3:27 pm

it may be for the power contest?
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dont play with airsofter with 1000$ gun and play with a 5 dollar pair of glasses
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Re: High Pressure Question

Unread postAuthor: ramses » Tue Oct 27, 2009 3:37 pm

Technician1002 wrote:
AngryChauncey wrote:I've been reading some posts about using 500-600psi and i was wondering what you would use to get this sort of pressure. Is it just a HUGE air compressor?


Due to the efficiencies of how much air remains in a cylinder when the piston returns and how much the remaining air expands a limits the amount of new air that will enter an already partially full cylinder, high pressure compressors are often multi stage. A single stage compressor is rarely used at over 250 PSI. Some large shop compressors for 175 PSI are 2 stage. 200 PSI seems to be the general division range between single and multi stage compressors for air.

A 500 to 600 PSI compressor will most likely be a 2 stage. 3 stage is common above 700 PSI. Paintball and SCUBA compressors are most often triple stage with a rare 4 stage.


I am working on an excel simulator for pumps. attached is the semi-completed version.
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Attachments
pump.zip
input stuff in the yellow boxes.

"pressure in" is the gauge pressure that is put in from the previous stage. so if it is the first or only stage, put in "0"
(146.94 KiB) Downloaded 34 times
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