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Need help buying a 3 way valve

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Need help buying a 3 way valve

Unread postAuthor: CooperJS » Tue Jul 10, 2012 10:16 am

Hey guys, i was looking through eBay and was wondering which 3 way i should get. One has two holes and the other has 3 which kinda confuses me, so i was wondering if you guys can help, also im surprised they don't make the holes any larger for fittings compared to slide valves. I hate the small fittings because they always come loose or they brake easily

http://www.ebay.com.au/itm/Pneumatic-2- ... 192wt_1139

http://www.ebay.com.au/itm/0-45-Thread- ... 573wt_1139

Cooper
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Unread postAuthor: mattyzip77 » Tue Jul 10, 2012 10:49 am

What kind of gun are you making??
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Unread postAuthor: CooperJS » Wed Jul 11, 2012 12:20 am

im planning on making a semi auto bb shooter, since i have heaps of bags of Bb's
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Unread postAuthor: Spud Destruction » Wed Jul 11, 2012 2:27 am

Ive never seen this type of valve use but i'm very interested to see what you have in mind.
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Unread postAuthor: Crna Legija » Wed Jul 11, 2012 5:59 am

You need to make sure its a normal open valve i couldn't see it in the description so id msg them before buying, if you get a normal closed one you will have to hold the trigger down to fill and let go to fire not very fun.

The one that has two threaded hole just pilots via a unthreaded hole, but if you want to use the pilot air for something you need the 3 port type, its up to you what one you want, also the cheap Chinese ones your looking at there don't handle pressure very well and start leaking at 200-250 psi.
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Unread postAuthor: CooperJS » Wed Jul 11, 2012 6:57 am

Yea, iv got some at home but they are all sheet and brake very easily and its hard to keep them in the one position, so i was thinking of buying a slide valve and make some sort of trigger for it and have a spring so it returns back to the fill position.

Heres the one i have: http://www.ebay.com.au/itm/2-Position-2 ... 573wt_1139

And they suck balls!

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Unread postAuthor: Crna Legija » Wed Jul 11, 2012 7:21 am

honestly i wouldn't go for the slide valve they work fine but are really annoying, if you want a good 3way get a clippard MJVO-3 IMO best 3way out there for this.
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Unread postAuthor: CooperJS » Wed Jul 11, 2012 9:22 am

I heard about those and i have heard good things about them didnt know you could get them that cheap, the cheapest one i saw was for $40 :/

Thanks Crna :)

Cooper
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Unread postAuthor: POLAND_SPUD » Wed Jul 11, 2012 12:03 pm

both of them look very similar and they are both chinease valves - that's why they are so poorly described :D

IIRC someone has bought and used some chinease valves... any idea who was it ? wasn't it you wyz ?


anyway ask them I can't really tell you much about them - both of them seem to be universal 3 way valves (so they can be used as either normally open and closed valves by switching the ports)
regardles of whether they are 1/8" or 1/4" they should be good enough to pilot anything up to 1/2" QEV
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Unread postAuthor: Crna Legija » Thu Jul 12, 2012 1:23 am

POLAND_SPUD wrote:IIRC someone has bought and used some chinease valves... any idea who was it ? wasn't it you wyz ?


my cheap ass boss bought them lasted about 2 days then started to leak, i think he knows why festo charge $40 for the same valve now.
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Unread postAuthor: wyz2285 » Thu Jul 12, 2012 2:02 am

IIRC someone has bought and used some chinease valves... any idea who was it ? wasn't it you wyz ?

Yap, and I´m a happy owner :D . They leak, but easily repared, currently using them around 300 psi.
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Unread postAuthor: PVC Arsenal 17 » Tue Jul 17, 2012 10:32 pm

Crna Legija wrote:honestly i wouldn't go for the slide valve they work fine but are really annoying, if you want a good 3way get a clippard MJVO-3 IMO best 3way out there for this.


It doesn't get any better than that. You can also add on a thumb actuator or a simple button for a trigger.

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Unread postAuthor: CooperJS » Wed Jul 18, 2012 1:29 am

Oh even better thanks for that :D
Hopefully be purchasing one very soon :D

Cooper
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Unread postAuthor: CooperJS » Thu Aug 16, 2012 5:01 am

Hey guys
Would any be able to recommend a 3 way valve?
The place Crna linked me to sold out :/ so i was wondering if anyone has got recommendation on what to use and if you could provide a link.

Thanks in the future
Cooper
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Unread postAuthor: PotatoEnemy17 » Thu Aug 16, 2012 8:35 am

Crna Legija wrote:You need to make sure its a normal open valve i couldn't see it in the description so id msg them before buying, if you get a normal closed one you will have to hold the trigger down to fill and let go to fire not very fun.


:idea: Even if it is normally open you can just connect it up differently.
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