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piston questions
Posted: Fri Apr 02, 2010 10:50 am
by gabeb123
ok i got 2 questions
1. i want to make a piston valve but i don't have to equipment to machine pvc so i decided i will either make it out of wax or epoxy. my question is could i just take a peace of 2" pvc and coat the inside with oil and then just poor in my melted wax?
2. i seen this site
http://www.members.tripod.com/potatogun ... valve2.htm
and with that rubber washer thing is their a hole in that or does the air enter threw the sides of that metal washer.
thanks
Posted: Fri Apr 02, 2010 11:02 am
by Gun Freak
Don't make one out of wax. It will break on the first shot.
Unless you use 5 psi
Also that valve on that site is a chamber sealer, don't make one. If I were you I wouldn't make a piston valve at all, they are too much trouble. But if you do decide to make one, make a barrel sealer.
Posted: Fri Apr 02, 2010 11:04 am
by gabeb123
oh ok well i guess ill make it out of epoxy then but that sounds hard lol
Posted: Fri Apr 02, 2010 11:16 am
by Gun Freak
Posted: Fri Apr 02, 2010 3:37 pm
by mark.f
If you're making a 2" piston 1-1/4" PVC SCH-40 fittings fit very well in 2" SCH-40 pipe, and with patience can be made to include O-ring grooves by spacing pieces of fittings over some 1-1/4" pipe or a 1-1/4" male fitting like a plug.
Posted: Fri Apr 02, 2010 3:41 pm
by Hubb
Posted: Fri Apr 02, 2010 3:43 pm
by MrCrowley
If I were you I wouldn't make a piston valve at all, they are too much trouble. But if you do decide to make one, make a barrel sealer.
Just because you can't get one to work
You have to figure out how to get one working sometime, so you may as well start now. They are incredibly useful. Though, I wouldn't recommend a piston valve for a first build.
Posted: Fri Apr 02, 2010 3:52 pm
by gabeb123
this isnt my first build i built one with a sprinkuler valve that i modded. i just havent put it on this site yet because it was winter and i couldnt shoot it but ill get it on this site as soon as i can borrow someones camera.
hey would this work?
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 602_263622
Posted: Sat Apr 03, 2010 2:32 pm
by metalmeltr
Any 5 minute epoxy from the local hardware store should work. A longer dry time would be even better since you would not be rushing aroung once you have the epoxy mixed.
Posted: Sat Apr 03, 2010 2:42 pm
by mark.f
http://i43.tinypic.com/143kni8.jpg
Clide was very helpful when I was going about making my first o-ringed piston valve.