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Another HP pump... 900+ psi

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Another HP pump... 900+ psi

Unread postAuthor: Fnord » Fri Mar 07, 2008 1:55 pm

I guess I should post this before I get lazy again.

This pump is not completely done; I still need to make a solid base and bolt everything down (It's hard to pump as it is right now).

-Body: 29" x 1/2" copper tubing
-(sleeved in 3/4" conduit for strength)
-Gauge: 0-1800 psi oxygen rated.
-Hookup: Mirco- quick connect valve
-Floating o-ring piston
-Homemade check valve made from modified fitting+schrader valve.


The schrader valve works, but it takes a lot of force to open it, so pumping becomes harder than it needs to be after a while. I may replace it with a completely homemade checkvalve later.


Prices:
Copper- ~$6.50
Fittings- (2 elbows, tee, bushing ~$7
Handle from and old pump which cost $10 before it broke
Everything else- Free


And of course, I don't have a gun to use this with.
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Attachments
100_4292.jpg
100_4291.jpg
Should be able to get past 1000 once I get a base made.
100_4288.jpg
Last edited by Fnord on Fri Mar 07, 2008 2:16 pm, edited 1 time in total.
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Unread postAuthor: Jared Haehnel » Fri Mar 07, 2008 2:08 pm

There will be a time when I will set forth and make one of these... nice work.

How much everything cost?
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Unread postAuthor: Gippeto » Fri Mar 07, 2008 2:12 pm

Looking good! That's very good pressure. Now you need to build something to use it in. (It'll drive you nuts if you don't.) :wink:
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Unread postAuthor: jackssmirkingrevenge » Fri Mar 07, 2008 2:30 pm

Just an idea, why not take spring out of the schrader so it closes by pressure only - or even easier, just use a presta valve?
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Unread postAuthor: psycix » Fri Mar 07, 2008 2:40 pm

Awesome!
But why first build a pump instead of a gun?
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Unread postAuthor: Fnord » Fri Mar 07, 2008 2:42 pm

Just an idea, why not take spring out of the schrader so it closes by pressure only - or even easier, just use a presta valve?


Well, Apparently this is the only schrader valve in the world that has an internal spring(not visible on the actual valve), otherwise I would have. I don't think anyone sells presta valves around here. In fact, I don't think I've ever seen one in person.

Awesome!
But why first build a pump instead of a gun?


I will need this for the injector on my railgun. Other than that, no reason, really. I just had the materials avalible.
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Unread postAuthor: POLAND_SPUD » Fri Mar 07, 2008 3:46 pm

wow... if I use 1/4" pipe will I get 1200 psi easily ?
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Unread postAuthor: jrrdw » Fri Mar 07, 2008 4:01 pm

Blowing a line at that pressure would be nasty! Nice work! Now, will your gun hold that kinda pressure? I guess so, you built it for that reason.
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