Question about valves

[Tshylea]

I want to buy some valves for a metering system, and I want them to operate automatically; ie. I don't want to have to grab onto a handle. I want to push a button and have them open. What would the fastest opening valve be? I want to push the button and have it be completely open right away. I keep looking at online stores but it never tells how fast they open. I'm assuming a pneumatic solenoid would open fastest, but what about an electric solenoid? And would it be cheaper to get one 3-way valve or 2 2-way valves?

[MisterSteve124]

they don't need to open fast it doesn't matter.

[Tshylea]

Its for an experiment I'm doing. I'll explain it later, because it would take a lot of explanation and I don't have time right now, but pretty much I need the fastest opening valve I can get.

[pyrogeek]

Let me guess, fully automatic spud gun?

[Tshylea]

Yes, but I don't want to hear about how it probably won't work. Like I said, its more of an experiment than a gun. Its like a device to test a bunch of theories before I try building an actual full auto one. I consider it to be the advanced prototype, and fully expect it to fail. I just want to learn from my mistakes, and hopefully someday develop a working one, or at least learn how to improve on single shot guns.

[Tshylea]

Sorry to double post, but I just spent way too much time trying to find out how fast solenoids open and I can't find any sites that tell you. I need to know soon, so does anyone here know?

[Scope]

you could use small moded sprinkler valves.

[Tshylea]

Or, you know, someone could be nice enough to tell me how fast solenoids open. I thought it was a simple question....

[jrrdw]

They normaly work on a magnetic field, so i would think it depends on the power of the magnetic field that is doing the work. Also how long it takes the electric to charge the field, and the reaction time it takes you to push the butten. Maby your experments should start with solinoids???

[Tshylea]

I was kinda hoping solenoids would be the "research" portion of the project. I was hoping someone who has used them would know, because I would rather not spend hundreds of dollars just to find out they aren't what I'm looking for.

[jrrdw]

There are hundreds if not thousands of different types of solenoids. If you go to the junk yard, ask forw a Chevy airconditioning throttle kicker. They work on 12 volt dc negitive ground. You should be able to get it real cheep. The 1 in my wheelchair lift is bad ass, but it cost $220.00 dollars, it's really strong and fast, for working the drift out locking latch.

[iknowmy3tables]

It varies but it you really need to make it open faster then just add juice

[Insomniac]

Killagorrilla had an irrighation solinoid and he said it worked well and actuated VERY quickly. Heres the link, you might want to ask him about it http://www.spudfiles.com/forums/viewtopic.php?t=4378&

[dogbite]

i need help plz totally new to making cannons i am making a pneamatic cannon and have bought and moded the easy no drill sprinkler vavle and i pump up my chamber to about 30 psi only to see if it will realease into the barrel but it dosnt, it all just blows out the blowgun back end and i cant get it to realese into the barrel. this is my gun


barrel valve chamber
-----------------------------oooo===========
-----------------------------oooo===========
ooo
y
y

<-------------------------------

the flow of the sprinkler vavle is facing the barrel

[frankrede]

Or, you know, someone could be nice enough to tell me how fast solenoids open. I thought it was a simple question....

If you could tell us we could tell you if your question is relevent. They open in a few miliseconds. They open almost instantly.

Btw. spinkler valves might not work for a metering system because they need pressure to seal, and you would have the pressure on the wrong side.