The real Spuah-Valve inside
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SpudStuff
- Sergeant 5
- Posts: 1410
- Joined: Sat Dec 10, 2005 3:55 pm
- Location: Cupertino, California
- Contact:
Here are my renderings
- Attachments
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- side of the plug. notice stop
- Plug-side.gif (14.86 KiB) Viewed 3990 times
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- The rear plug shown without screw holes
includes o-ring grooves
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- front of piston where washer is bolted on over neopreme
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- Bach of the piston hollowed out and filled with foam to reduce volume behind piston and reduce piston mass
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boilingleadbath
- Staff Sergeant 2
- Posts: 1635
- Joined: Sat Mar 12, 2005 10:35 pm
- Location: Pennsylvania, USA
spudstuff, it looks tapered to me. Perchance 1.59*?
As to being type 2:
It's the same tone of beige as mcmaster's type 2 stock.
Using type 2 for a piston makes sence. You want impact resistance, no?
As to being type 2:
It's the same tone of beige as mcmaster's type 2 stock.
Using type 2 for a piston makes sence. You want impact resistance, no?
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mark.f
- Sergeant Major 4
- Posts: 3638
- Joined: Sat May 06, 2006 11:18 am
- Location: The Big Steezy
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I like the way he leaves the back plug removable for service. The O-ring seal/screws idea beats just solvent welding it in there anyday.
And yes, in their original e-mail context, the sender said that the piston seals against 2" SCH-40 pipe coming from the inlet. That oughtta help you in GGDT with those things, (2.067" porting).
EDIT: I still think you guys aren't considering what the inside of a NSF-pw rated tee is shaped like. The bottoming depth on each slip, (part the pipe or spigot fitting pushes into), is bored to 3.5" and then where it bottoms, the slip decreases in inside diameter so that the pipe or fitting will bottom.
The back plug and piston BOTH slide inside the part bored to 3.5" in the piston, and the piston is lathed down at the end so that it goes over the decrease in inside diamter to seal against the piece of 2" pipe. This would be kind of a key thing in designing your own piston, as that would set you back if you didn't account for it.
On another note, you could just bore the tee to 3.5" with a lathe or drill press, (with spade bit), so the piston would slide all the way, but there is no telling how that will effect pressure rating, which is why I don't think Joel did that...
And yes, in their original e-mail context, the sender said that the piston seals against 2" SCH-40 pipe coming from the inlet. That oughtta help you in GGDT with those things, (2.067" porting).
EDIT: I still think you guys aren't considering what the inside of a NSF-pw rated tee is shaped like. The bottoming depth on each slip, (part the pipe or spigot fitting pushes into), is bored to 3.5" and then where it bottoms, the slip decreases in inside diameter so that the pipe or fitting will bottom.
The back plug and piston BOTH slide inside the part bored to 3.5" in the piston, and the piston is lathed down at the end so that it goes over the decrease in inside diamter to seal against the piece of 2" pipe. This would be kind of a key thing in designing your own piston, as that would set you back if you didn't account for it.
On another note, you could just bore the tee to 3.5" with a lathe or drill press, (with spade bit), so the piston would slide all the way, but there is no telling how that will effect pressure rating, which is why I don't think Joel did that...
all of the manufacturers use different molds for their fittings, i forget what manufacturer joel gets his tee's from, but i know its not one i've ever seen in any store, perhaps that brand of tee is molded differently, without the large stops inside?
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SpudStuff
- Sergeant 5
- Posts: 1410
- Joined: Sat Dec 10, 2005 3:55 pm
- Location: Cupertino, California
- Contact:
the lasco tees by my house have stops that are about 1/2 a mm tall. so the elevated oring would make the piston clear the stop
looking at the pictures of the mega launcher 2 you can tell the tees are lasco. thoes are the same ones around my house. thay have a micro stop
looking at the pictures of the mega launcher 2 you can tell the tees are lasco. thoes are the same ones around my house. thay have a micro stop