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What kind of valve would this be called?


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#1 arfink

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Posted 29 August 2011 - 12:57 PM

I was looking around at the SG Nerf blogs and found this:

http://modworks.blog...nals-guide.html
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The tank and valve are a very cool design, one I have never seen before. Looking at SGNerf's pictures I believe this would be fairly easy to replicate in a homemade, except for the blue sealing part.

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What you're looking at is a sealing thingy which has a catch on the stem, much like a plunger rod, but it's designed to press against that seal when at rest, and then the catch is released the blue part moves away from the tank front and towards the barrel, releasing the air. I've been thinking that blue piece is the only real challenge of replicating this. Do any of you lathe owners/users think you could fabricate something like that out of delrin?
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#2 roboman

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Posted 29 August 2011 - 12:59 PM

That is identical in function to my SCUNBAG. So yes, it can be made pretty easily.

I like the way it seals. I might have to alter my design, since it seems that a sealing face like that would be easier to make.

EDIT: Of course, if you really wanted one like that, I could definitely make you something out of aluminum or Delrin. The main advantage of a SCUNBAG is that it can be made without a lathe. I only used mine when I made it to clean up some faces, just so it would look slightly nicer.

Edited by roboman, 29 August 2011 - 01:22 PM.

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#3 nerf mafia

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Posted 29 August 2011 - 06:25 PM

That valve works the exact same way as the marshmallow fun co. Mazooka. I wonder if this is made by them?
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#4 Buffdaddy

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Posted 29 August 2011 - 06:58 PM

That valve works the exact same way as the marshmallow fun co. Mazooka. I wonder if this is made by them?


I know the Marshmallow Blaster is like that, but I thought the Mazooka was an inverted swing check valve. There's only a little plastic nub sticking off the trigger in front of the chamber, and when you pull that, the pressure beats the small torsion spring and forces it open.
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#5 roboman

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Posted 29 August 2011 - 08:03 PM

I know the Marshmallow Blaster is like that, but I thought the Mazooka was an inverted swing check valve. There's only a little plastic nub sticking off the trigger in front of the chamber, and when you pull that, the pressure beats the small torsion spring and forces it open.


That's still the same concept; it just uses a flap instead of a piston.
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#6 arfink

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Posted 29 August 2011 - 08:31 PM

That is identical in function to my SCUNBAG. So yes, it can be made pretty easily.

I like the way it seals. I might have to alter my design, since it seems that a sealing face like that would be easier to make.

EDIT: Of course, if you really wanted one like that, I could definitely make you something out of aluminum or Delrin. The main advantage of a SCUNBAG is that it can be made without a lathe. I only used mine when I made it to clean up some faces, just so it would look slightly nicer.


I like how the scunbag can be made without a lathe, but it seems alot more complex than this in terms of number of steps to build it.
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#7 roboman

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Posted 29 August 2011 - 08:40 PM

I like how the scunbag can be made without a lathe, but it seems alot more complex than this in terms of number of steps to build it.


No, it's really not - I just broke it down into many steps, so that people could better understand how to put it together, since it's something that hasn't really been done in the homemade world before.
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#8 arfink

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Posted 29 August 2011 - 10:31 PM

No, it's really not - I just broke it down into many steps, so that people could better understand how to put it together, since it's something that hasn't really been done in the homemade world before.


Well then I need to re-read is a few more times, because I still don't get it.
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#9 roboman

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Posted 30 August 2011 - 12:05 AM

Well then I need to re-read is a few more times, because I still don't get it.


You don't get how to assemble it, or you don't get how it works? The CAD model at the bottom shows a cutaway of all the parts installed.
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#10 nerf mafia

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Posted 30 August 2011 - 09:15 AM

Buff, I know for sure my first gen mazooka had that exact same valve, I can't saw for sure about the others. There have been 3 or so different ones, the very first gen ones don't have the shut off for the air compressor when the tank is full, and the front isn't round. I'll try to get some pics up I know I took some and have them saved somewhere, just can't remember where.
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