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3way valves/sleeve valves

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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3way valves/sleeve valves

Unread postAuthor: POLAND_SPUD » Tue Jan 08, 2008 3:26 pm

1. I want to use some valve that would vent the pilot side and block the air inlet into the pilot side ( from compressor/CO 2 tank whatever ).... Are there any other valves apart from a 3way valve and a sleeve valve that can do that ?

2. Which one is likely to withstand higher pressure, a 1/4" sleeve valve rated to 10 bar (140 psi) or a 3way valve rated to 10 bar ?
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Re: 3way valves/sleeve valves

Unread postAuthor: clide » Tue Jan 08, 2008 3:35 pm

POLAND_SPUD wrote:1. I want to use some valve that would vent the pilot side and block the air inlet into the pilot side ( from compressor/CO 2 tank whatever ).... Are there any other valves apart from a 3way valve and a sleeve valve that can do that ?


Not really, because any valve that could do that would be a 3-way valve by definition(including a sleeve valve).

As for the pressure question it depends on what kind of 3-way valve, there are tons of different kinds.

They do make a sleeve valve that is made for use with unregulated CO2, but it is only 1/8"
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Unread postAuthor: POLAND_SPUD » Tue Jan 08, 2008 3:50 pm

ok clide by saying a 3 way valve I just meant this type of valves ( picture ) are they called spool valves in english?

I need something that can work well up to 25 - 28 bar ( 350 - 400 psi), which would be better a 1/4" sleeve valve or a 1/4 " 3 way valve/spool valve ?
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Unread postAuthor: clide » Tue Jan 08, 2008 8:51 pm

Well, I wouldn't suggest using any part over its rating (especially almost 3x the rating), but if you are going to do it regardless then I would guess that a sleeve valve would probably be more robust.
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Unread postAuthor: POLAND_SPUD » Tue Jan 08, 2008 9:21 pm

thx... that quite suprised me... I expected just the opposite...

But i hope more people would see this and possibly there are some high pressure rated spool valves/3 way valves that they know about.... so any coments are welcomed
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Unread postAuthor: socoj2 » Tue Jan 08, 2008 10:12 pm

They have high PRessure 3 way solenoids but... they are going to be like $500
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Unread postAuthor: Hailfire753 » Tue Jan 08, 2008 11:03 pm

McMaster has slide valves rated to 230 psi. Image
It says that " when closed it vents pressure to atmosphere". Does this mean it vents both sides, or just one, ie. pilot side?

Of course, you could just make a slide valve like clide's.
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Unread postAuthor: POLAND_SPUD » Wed Jan 09, 2008 12:43 pm

it means AFAIK that it vents only the pilot side while closing the other.... this makes actually sense when used on QEV spudguns
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Unread postAuthor: Hotwired » Wed Jan 09, 2008 1:10 pm

It vents pilotside.

It's intended for manually activating a pneumatic system then when you want it off you pull the sleeve back, the supply is shut off and the pneumatic system has its air vented.
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Unread postAuthor: grumpy » Wed Jan 09, 2008 2:06 pm

you can get slide check valves that are rated to 2k psi from any paintball shop or online for about 12 to 15$. we use the in paintball to disconnect air tanks without loosing a lot of air.
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Unread postAuthor: Hailfire753 » Wed Jan 09, 2008 4:50 pm

To the paintball store, then! I knew about them, but I didn't think of that till you mentioned it. Thanks!
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Unread postAuthor: POLAND_SPUD » Thu Jan 10, 2008 1:08 am

thx... the only problem now is how to get it in poland
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