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3" Piston in a 3" Tee?

Posted: Wed Feb 11, 2009 4:57 pm
by Mrcrouse1
Ok, so I have changed my idea again, because certain parts just dont fit together. I am thinking of cutting some polyethelyne rod up and putting a check valve in it, and bolting 2 segments together as a pison. Would this work? Would it withstand 100psi? http://www.mcmaster.com/#8701k55/=kt1yz

Posted: Wed Feb 11, 2009 5:00 pm
by jmeyer1022
Those who know how to build this won't tell you because Gort makes money selling them. Your best bet is to build your own 2" or 3" piston valve, if your looking for a mauler your going to have to buy one sorry.

Posted: Wed Feb 11, 2009 5:26 pm
by psycix
Isnt a mauler nothing more then a well-made chamber-sealing piston valve with o-rings and a check valve in the piston?

Posted: Wed Feb 11, 2009 5:33 pm
by ckman
Yeah thats all it is it just has a fancy name.

Posted: Wed Feb 11, 2009 6:06 pm
by jonnyboy
psycix wrote:Isnt a mauler nothing more then a well-made chamber-sealing piston valve with o-rings and a check valve in the piston?
I thought the mauler was a copy of what joel made which had a diaphragm valve in there as well.

Posted: Wed Feb 11, 2009 6:33 pm
by daberno123
The wiki disagrees, saying its a barrel sealer.

Posted: Wed Feb 11, 2009 9:48 pm
by MrCrowley
If you want to copy the mauler, you'll need a lathe.

If you want to build a piston valve, you can use what you want. The mauler is more powerful because of its tight tolerances, built-in check valve, o-rings etc.

Posted: Wed Feb 11, 2009 9:54 pm
by Mrcrouse1
I can probably get acess to the lathe at my school, the design I hand dress has a check valve and O-rings. It consists of 2 2" couplers and 2"-1/2" bushings inside them for the valve and bolts for the neoprene washers. My question is, will a 2" PVC coupler fit well inside a 2.5" tee?

Posted: Thu Feb 12, 2009 5:08 pm
by Mrcrouse1
Also, does anyone know a good place to get 2.5" PVC and fittings?

Posted: Thu Feb 12, 2009 6:04 pm
by jmeyer1022
Please don't double post next time use edit.

Posted: Thu Feb 12, 2009 6:47 pm
by frankrede
Mrcrouse1 wrote:Also, does anyone know a good place to get 2.5" PVC and fittings?
Irrigation supply stores. Look in your phonebook.

@Jmeyer, you really don't need to people to not double post, its really redundant and only adds another useless post.

Posted: Thu Feb 12, 2009 8:14 pm
by ralphd
I get my 2 1/2" fittings through Graingers. Tee's are about $10. Before you start look here;

http://www.geocities.com/advancedinvent ... ansspv.htm

I wish I found this before I started my piston. I may make one just to see if iI can do it. Good luck.

Posted: Thu Feb 12, 2009 9:36 pm
by Mrcrouse1
So I checked out the sizes and such for fittings, and my original idea will not work. Would a 3" diameter polyethylene rod be able to withstand 100psi? http://www.mcmaster.com/#8701k55/=kt1yz
I am thinking about putting this inside a 3" coupler, I'll machine in o-rings and a check valve and such.

Posted: Thu Feb 12, 2009 10:54 pm
by Gippeto
Should work. Why not skip the check valve and use a floating o-ring?

Have a look at the piston for my "bb" gun.

http://www.spudfiles.com/forums/x-1-1-m ... 16607.html

Posted: Fri Feb 13, 2009 12:45 pm
by jimschouster
This is what I am trying its 3" x 4" 1/8" Neoprene in a 3" tee

http://i569.photobucket.com/albums/ss13 ... 0_1252.jpg