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Ill Name It Shocky....

A place to ask general spud cannon related questions.
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Unread postAuthor: VH_man » Wed Jul 30, 2008 6:53 am

I should really update this thing.......

i DO NOT RECCOMEND a schrader valve as a check valve. its inneficient and you HAVE to epoxy it in. and pumps get hot. VERY HOT. and epoxy gets SOFT when it gets HOT. its a bad combo when you put 300 PSI on one end.

what i used for a check valve once that failed was a little rubber ball i found and an 1/8 inch pipe nipple, screwed into two 1/8 inch to 1/2 inch Galvanized steel reducers. it works great, and i havent had a problem with it yet.

I will Post a pic if youd like.

and PM me with any questions. I will answer them to the best of my ability
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Unread postAuthor: mobile chernobyl » Wed Jul 30, 2008 7:32 am

Kind of a weird idea but...

For a check valve could one use a spring loaded ball valve that was only activated by a notch that would index it at about 95% stroke. After 99% of the stroke was complete the notch would have passed the ball valve and it would reset, so you could pull the lever back up and then there could be another ball valve on the top lever that would only open on the up stroke. Sorry if im not explaining it right, but it would make high pressure pumps easier to make for alot of people who either don't feel like making a check valve (me) or or can't. I'm pretty sure my idea would work, but I still would need to have a really good sealing o-ring. Any suggestions on the size o-ring for common 1/2" copper?
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Unread postAuthor: Gippeto » Wed Jul 30, 2008 9:20 am

Check valves are easy to make. Why complicate something that is so simple?

for reference

http://142.179.166.227/hitechseals/pdf/ORingChart.pdf
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Unread postAuthor: LikimysCrotchus5 » Wed Jul 30, 2008 9:03 pm

I have a question...........
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Attachments
PUMP.JPG
What is that, and whats its purpose?
PUMP.JPG (39.46 KiB) Viewed 687 times
4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
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Unread postAuthor: VH_man » Wed Jul 30, 2008 9:41 pm

hahaha. That was a little thing to keep the piston rod inline with the pipe while i was pumping. its a socket wrench thingie. it basically served no actual purpouse. its blue because its wrapped in tape to try to make it fit in the cylinder.

it has been replaced with a pump shaft that fits inside the copper nicely.........
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Unread postAuthor: Mitchza89 » Sat Aug 02, 2008 8:33 pm

Hmmm I'm looking to make an extreme pressure pump, my homemade 350psi pump isn't doing it for me anymore... I've got all the parts for the new small bore pump but I can't find the right fitting o-ring.....very annoying...

Anyway nice pump mate, very well done
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Unread postAuthor: VH_man » Sat Aug 02, 2008 9:12 pm

by the way, my check valve keeps failing around 400....... so....... dont look to me for your check valve wowes anymore...... lol.

any ideas would be appreciated.
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Unread postAuthor: Sticky_Tape » Sat Aug 02, 2008 9:38 pm

Because of heat? Solution wet rag near check on the outside of the pump.
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You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
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Unread postAuthor: Mr.Sandman » Sat Aug 02, 2008 11:00 pm

Mitchza89 wrote:Hmmm I'm looking to make an extreme pressure pump, my homemade 350psi pump isn't doing it for me anymore... I've got all the parts for the new small bore pump but I can't find the right fitting o-ring.....very annoying...

Anyway nice pump mate, very well done


hey mitchza what size o rings do you need cause i could machine them for you....................for a price of course :twisted:
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Yeah, it's that important.
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