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"Quick release" flange?

A place to ask general spud cannon related questions.
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Unread postAuthor: jonathanb » Fri Sep 18, 2009 1:10 pm

I'm trying to fit more test equipment than I probably should into the budget, so I'm doing things on the cheap when possible :)

I was under the impression the modified sprinkler valve would work out better (lower PSI for same velocity), but the QEV probably makes more sense from a safety standpoint. Of course, I based my numbers off your tool, so chances are you know better than me!
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Unread postAuthor: covey12 » Fri Sep 18, 2009 1:28 pm

im not sure exactly what your asking, what does this have to do with the quick release? :?:
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Unread postAuthor: POLAND_SPUD » Fri Sep 18, 2009 1:34 pm

I'm looking to change out between two different barrels on a relatively regular basis (2.5" and 3")
maybe unions?
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Unread postAuthor: jonathanb » Fri Sep 18, 2009 1:37 pm

topic has drifted a bit covey, since we found the "quick-clamp fittings" - and I'm too lazy to start a new thread!
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Unread postAuthor: cdheller » Fri Sep 18, 2009 4:36 pm

" "topic has drifted a bit covey, since we found the "quick-clamp fittings" - and I'm too lazy to start a new thread!" "


http://www.victaulic.com/inCommerce/det ... e_id=48385

snap lock coupling ,victaulic ...probably overkill for what you need, but another option
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Unread postAuthor: D_Hall » Fri Sep 18, 2009 4:58 pm

jonathanb wrote:I'm trying to fit more test equipment than I probably should into the budget, so I'm doing things on the cheap when possible :)

I can definitely respect that. I will say though, that when it comes to rigorous testing there never seems to be enough money to do it right the first time but there's always enough money to do it over (if you follow my drift).

I was under the impression the modified sprinkler valve would work out better (lower PSI for same velocity), but the QEV probably makes more sense from a safety standpoint. Of course, I based my numbers off your tool, so chances are you know better than me!

Performance between a QEV and a sprinkler valve of similar sizes will be pretty similar... But the QEV is (obviously) a lot safer. Honestly, although I started with modified sprinkler valves I will never again go that route nor would I recommend it to anybody. The whopping $5 or whatever you save by going to sprinkler valve route just isn't worth it.
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Last edited by D_Hall on Fri Sep 18, 2009 5:29 pm, edited 2 times in total.
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Unread postAuthor: spudtyrrant » Fri Sep 18, 2009 4:59 pm

jonathanb wrote:I'm trying to fit more test equipment than I probably should into the budget, so I'm doing things on the cheap when possible :)

I was under the impression the modified sprinkler valve would work out better (lower PSI for same velocity), but the QEV probably makes more sense from a safety standpoint. Of course, I based my numbers off your tool, so chances are you know better than me!

A QEV is something known as a barrel sealing piston valve(some are diaphragm), and it will most likely outperform a sprinkler valve of the same size. Another advantage is you don't have to tap threads, they come ready to go.

btw: here is how piston valves work just in case you wanted to know http://www.spudfiles.com/forums/piston- ... t8157.html
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Unread postAuthor: jackssmirkingrevenge » Sat Sep 19, 2009 1:30 am

I suppose this is the time one points out the hilarity of the title of this thread when one considersthe British slang meaningof the term :)
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Unread postAuthor: MrCrowley » Sat Sep 19, 2009 2:01 am

and it will most likely outperform a sprinkler valve of the same size

It will easily out perform a modified sprinkler valve of the same size. Even 3/4" QEV's are supposidly better than 1" modded sprinklers.
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Unread postAuthor: jimmy101 » Sat Sep 19, 2009 2:36 pm

A question, why can't you use threaded fittings? The cam locks are great but if you are only swapping barrels on occasion then just go with threaded fittings.

BTW, what's the chamber and barrel made out of? From you concern about using plastic with pressurized air I assume that means both are metal.
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Unread postAuthor: jonathanb » Mon Sep 21, 2009 1:03 pm

jimmy101 wrote:A question, why can't you use threaded fittings? The cam locks are great but if you are only swapping barrels on occasion then just go with threaded fittings.

BTW, what's the chamber and barrel made out of? From you concern about using plastic with pressurized air I assume that means both are metal.


ASME-code tank, all pipe, fittings, and barrel will be steel. All pressure rated for air to 125+psi, I expect not to exceed 60psi ever. There will be a pop-safety valve for 125psi on the tank. Barrel sizing might be a bit difficult, but I think I can make it work.

Screw on fittings work but they also cause issues with the supports for the barrel needing to accommodate rotation. A QR system just makes my life easier, as long as the cost isn't too astronomical.

The other thing I'm still considering is whether or not to put a breach load on it - I think I'll probably go without for now and possibly retrofit later (shouldn't be that big a deal to retrofit).

My plan in terms of budget is to make expandable systems - so start with a base system now, on a budget, and make it relatively easy to add systems. For example, a velocimeter so I don't need to calculate speed off high-speed video every shot! This is certainly not as cheap as doing it "right" from the start, but it's way cheaper than building a low-end system now and the right system later!

Thanks for the advice on the QEV, will definitely go that route.
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