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3/4in brass check valves

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3/4in brass check valves

Unread postAuthor: c11man » Sat Apr 11, 2009 6:29 pm

my friend got like 6 used brass check valves and i was wondering what i could do with them. no i do not want to sell them for scrap if anyone was thinking that.

of almost forgot, these check valves are the swing check type
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Unread postAuthor: rp181 » Sat Apr 11, 2009 9:32 pm

put them all together and make one big check valve.

Really, what can you do? Only usefull for homebuilt low pressure pumps.
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Unread postAuthor: c11man » Sat Apr 11, 2009 10:49 pm

i didnt know if there was some like cool project that needed big check valves or something...

well the pump wouldnt have to be that low of pressure. they are rated to 200psi (i think) and are all metal so i think i could make a pump for around 300psi

i could make a completly sealing piston with a check valve going in and one going out. with this i could hook up a compressed air source to the in so that i would only pump from 150 up to 300
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Unread postAuthor: psycix » Sun Apr 12, 2009 7:48 am

Convert one into a hammer valve?
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Unread postAuthor: c11man » Sun Apr 12, 2009 8:05 am

how would you convert one to a hammer valve?
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Unread postAuthor: psycix » Mon Apr 13, 2009 7:02 am

Use something to push it open.
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Unread postAuthor: c11man » Mon Apr 13, 2009 8:01 am

the only thing with that is that the flap is quite large and i think it would be hard to push it open even at normal compressor pressures.

also the thing that would push it open would have to be on the barrel side.
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Unread postAuthor: psycix » Mon Apr 13, 2009 4:53 pm

They will indeed need quite a hit to open, but in return you will get a good flow.

Need to push open on the barrel side?
Not necessarily. Maybe you could pull it open, or build a T piece in front of it.
You could also try a mortar. Drop the projectile in, projectile hits a pin, pin hits valve.

I do not know how the specific valves look/work but with a bucket full of imagination and creativity possibilities are endless.
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Unread postAuthor: c11man » Mon Apr 13, 2009 9:06 pm

a small bore 150psi morter would be cool...

but the seat is the full 3/4 witch means that at 150psi that there is 75 pound holding the flapper closed.

this would mean that i would need some heavy ammo and/or a opening assist device. also i could make a metal device that would have oppenings that would travel with the ammo and open the check vavle and then allow the air to flow past pushing the ammo out the barrel.

anouther problem would be that if the projectile would slide easily so that it would have the force to open the valve witch would mean that there would be more blowby

i know that this is a lot of negatives but they can be overcome

lol .19 spud bux....
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