Where to find check valves?

Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
acs2997
Private 4
Private 4
Posts: 62
Joined: Wed Jul 04, 2012 10:36 pm

Sat Jan 12, 2013 10:00 am

Hello all,
I'm trying to find small check valves that I can put into a 2" piston, but everywhereive gone, the check valves are larger than my actual piston.

Does anyone know where I can find small check valves?
User avatar
jackssmirkingrevenge
Five Star General
Five Star General
Posts: 25836
Joined: Thu Mar 15, 2007 11:28 pm
Has thanked: 157 times
Been thanked: 93 times

Donating Members

Sat Jan 12, 2013 10:06 am

Image
hectmarr wrote:You have to make many weapons, because this field is long and short life
acs2997
Private 4
Private 4
Posts: 62
Joined: Wed Jul 04, 2012 10:36 pm

Sat Jan 12, 2013 10:11 am

Where would I find something like that? That's pretty much exactly what I need. Wait, isn't that the valve used on bikes? Maybe I'm wrong but that's what's used on racing bikes
User avatar
jackssmirkingrevenge
Five Star General
Five Star General
Posts: 25836
Joined: Thu Mar 15, 2007 11:28 pm
Has thanked: 157 times
Been thanked: 93 times

Donating Members

Sat Jan 12, 2013 10:15 am

hectmarr wrote:You have to make many weapons, because this field is long and short life
acs2997
Private 4
Private 4
Posts: 62
Joined: Wed Jul 04, 2012 10:36 pm

Sat Jan 12, 2013 10:20 am

Thanks! Yeah, my friends dad does a lot of cycling, I'm sure I can get one from him. Thanks, I never would've thought to use one of those.
User avatar
jackssmirkingrevenge
Five Star General
Five Star General
Posts: 25836
Joined: Thu Mar 15, 2007 11:28 pm
Has thanked: 157 times
Been thanked: 93 times

Donating Members

Sat Jan 12, 2013 10:25 am

You could also use a schrader instead of a presta, but because of its internal spring you will have significantly lower pressure in the chamber than in the pilot (assuming you want this for an o-ringed piston).
hectmarr wrote:You have to make many weapons, because this field is long and short life
acs2997
Private 4
Private 4
Posts: 62
Joined: Wed Jul 04, 2012 10:36 pm

Sat Jan 12, 2013 10:54 am

Yeah, I'll probably go with the presta. How fast will it beagle to fill up e air chamber? Will it significantly restrict how fast it fills? I'm trying to make a semiauto gun, and I want the rate of fire as high as possible
User avatar
jackssmirkingrevenge
Five Star General
Five Star General
Posts: 25836
Joined: Thu Mar 15, 2007 11:28 pm
Has thanked: 157 times
Been thanked: 93 times

Donating Members

Sat Jan 12, 2013 12:47 pm

acs2997 wrote:How fast will it beagle to fill up e air chamber? Will it significantly restrict how fast it fills?
Pretty fast :)

[youtube][/youtube]

Depends on the size of your chamber, a largish one might take a couple of seconds to fully pressurise.
hectmarr wrote:You have to make many weapons, because this field is long and short life
acs2997
Private 4
Private 4
Posts: 62
Joined: Wed Jul 04, 2012 10:36 pm

Sat Jan 12, 2013 12:59 pm

I'm only shhooting paintballs, I'm not Punkin Chuckin here. The air chamber is about a foot and a half of 2" pvc. Thnk thats a god size?

Btw, I love the video :wink:
User avatar
Brian the brain
Moderator
Moderator
Posts: 3495
Joined: Mon Dec 05, 2005 2:06 am
Location: Holland

Sat Jan 12, 2013 2:59 pm

God size would be slightly bigger.

A rubber flap over a tiny hole will work as a checkvalve.
Assuming the sealing face will be made outof a sheet of rubber...all you would need is a tiny hole on the side, between the seat diameter and the outside.

have the rubber sheet cover the entire front of the piston....and drill...
Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
User avatar
mark.f
Sergeant Major 3
Sergeant Major 3
Eritrea
Posts: 3570
Joined: Sat May 06, 2006 11:18 am
Location: The Big Steezy
Has thanked: 15 times
Been thanked: 10 times
Contact:

Donating Members

Sat Jan 12, 2013 6:46 pm

If your piston is o-ringed (and actually seals in the carriage), you probably don't want a completely airtight check valve too. Leaving it charged, a small leak in the pilot could reduce pilot pressure enough to fire accidentally.

Clide (a user on these forums) made check valves using a male-female adapter and plug, a small spring, and an airsoft bb for this exact purpose.

Image
acs2997
Private 4
Private 4
Posts: 62
Joined: Wed Jul 04, 2012 10:36 pm

Sat Jan 12, 2013 6:57 pm

Is that in his slider?
User avatar
mark.f
Sergeant Major 3
Sergeant Major 3
Eritrea
Posts: 3570
Joined: Sat May 06, 2006 11:18 am
Location: The Big Steezy
Has thanked: 15 times
Been thanked: 10 times
Contact:

Donating Members

Sat Jan 12, 2013 6:59 pm

No, it's the Straight Through Valve (inline piston valve). But he used them on a lot of his barrel sealers.
acs2997
Private 4
Private 4
Posts: 62
Joined: Wed Jul 04, 2012 10:36 pm

Sat Jan 12, 2013 7:17 pm

Alright. I'll play around with it a little bit, I'll see what works and what doesn't. Thanks for the input, I've had an experience with accidental firings, not exactly the best day in my life
Post Reply