DIY Push to add valve

cstmwrks · 3rd October 2007, 23:51

This is the basics of my regulator mounted push to add valves for all my 02 rebreathers. It starts with a brass tire stem and a flair adapter to 1/8 npt. Both from McmasterCarr. The tire stem is silver soldered to the flair adapter and then machined with a groove for the rubber boot. Everything gets polished then nickel plated and polished again.

The valve button is delrin plastic with a SS screw set in the center to open the schrader valve when pushed. The inside of the button is machined a bit oversized for ease of movement and ( duh ) allow gas to flow by. The outside also has a groove to retain the rubber boot.

It may seam a bit scabby to use a tie wrap on the rubber boot but it does work. I have not ordered any smaller spring clamp like I use on the rest of the hose fittings as of yet.

**SeaBass** · 7th October 2007, 17:27

Bill,

Great work!

Just currious what did you make the rubber boot out of?

--SB

cstmwrks · 7th October 2007, 17:50

Quote: (Originally Posted by SeaBass)

Bill,

Great work!

Just currious what did you make the rubber boot out of?

--SB

I machined out a former from bar stock and made a dipped natural rubber boot.

At some point I was going to try some thing with RTV silicone but that has fallen by the wayside for the moment. As it is the rubber one I made has three or more years on it with no issues.

Bill

3rd October 2007, 23:51	#1 (permalink)
cstmwrks The old ways still work. Current Rebreather/s: Home Build Other Rebreather/s: Not Bought Yet Home Build Join Date: Sep 2006 Location: Boise Idaho Posts: 238	DIY Push to add valve This is the basics of my regulator mounted push to add valves for all my 02 rebreathers. It starts with a brass tire stem and a flair adapter to 1/8 npt. Both from McmasterCarr. The tire stem is silver soldered to the flair adapter and then machined with a groove for the rubber boot. Everything gets polished then nickel plated and polished again. The valve button is delrin plastic with a SS screw set in the center to open the schrader valve when pushed. The inside of the button is machined a bit oversized for ease of movement and ( duh ) allow gas to flow by. The outside also has a groove to retain the rubber boot. It may seam a bit scabby to use a tie wrap on the rubber boot but it does work. I have not ordered any smaller spring clamp like I use on the rest of the hose fittings as of yet. __________________ Why you ask... well it's not like I have anything better to do.
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7th October 2007, 17:27	#2 (permalink)
SeaBass Thom Susko Current Rebreather/s: Megalodon Ray Home Build Other Rebreather/s: Not Bought Yet Ray Home Build Join Date: Jul 2006 Location: San Clemente, CA Posts: 232	Re: DIY Push to add valve Bill, Great work! Just currious what did you make the rubber boot out of? --SB
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7th October 2007, 17:50	#3 (permalink)
cstmwrks The old ways still work. Current Rebreather/s: Home Build Other Rebreather/s: Not Bought Yet Home Build Join Date: Sep 2006 Location: Boise Idaho Posts: 238	Re: DIY Push to add valve Quote: (Originally Posted by SeaBass) Bill, Great work! Just currious what did you make the rubber boot out of? --SB I machined out a former from bar stock and made a dipped natural rubber boot. At some point I was going to try some thing with RTV silicone but that has fallen by the wayside for the moment. As it is the rubber one I made has three or more years on it with no issues. Bill __________________ Why you ask... well it's not like I have anything better to do.
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