Air tank valve stop??

[AlanMcD]

OK. Now with @rcs9250 's comment about the hard brass collar possibly bottoming out, I have another new hair brained idea - sand down the full base of the part to get more engagement wht a little more turn of the knob . . .

If the brass does extend past the plastic (like in rcs9250's illustration, it would be pretty easy to do a flat sanding approach, but if the plastic is flush it would be hard to do that without embedding swarf in the plastic - that would probably call for sanding the brass on an angle to keep the plastic from contacting the paper (or file, if you go that route) too.

Of course once done, you could then apply a little heat to the plastic to smooth it out too . . .

But I do hope you find a new part at a reasonable price!

 

[rcs9250]

OK. Now with @rcs9250 's comment about the hard brass collar possibly bottoming out, I have another new hair brained idea - sand down the full base of the part to get more engagement wht a little more turn of the knob . . .

If the brass does extend past the plastic (like in rcs9250's illustration, it would be pretty easy to do a flat sanding approach, but if the plastic is flush it would be hard to do that without embedding swarf in the plastic - that would probably call for sanding the brass on an angle to keep the plastic from contacting the paper (or file, if you go that route) too.

Of course once done, you could then apply a little heat to the plastic to smooth it out too . . .

But I do hope you find a new part at a reasonable price!

Yep, that’s something that might work. File the brass carefully so that the roll crimp is removed. I don’t think it’s possible for air to get under the nylon insert (area A in photo) and pneumatically eject the insert but you could always cross drill at the point shown at the lower short arrow and install a roll pin and file ends of roll pin flush with brass OD.

Another thing to do before filing off roll crimp that could verify if the brass roll crimp is contacting the valve body is to get a Sharpie and make a black ring as shown in red on second photo, then assemble valve, crank the valve closed like you normally would and then disassemble and see if the Sharpie transferred onto valve body and has rubbed off of roll crimp.

 

[Revoman]

AlanMcD​

Any and all "hairbrained" ideas are taken seriously by me. I'm glad that you have offered them up!
It might be something to try if all of my other, not so hairbrained, ideas don't pan out.
Thanks!

rcs9250​

Good stuff!
As above, I am open to any and all ideas to mitigate the exorbitant cost that Brancato is charging, unless there IS nothing else that can be done.
Thank you for your continuing comments and support!

mike

 

[kayaker]

I would think a dive shop could help you out, I did find this on google (Breathing Air Systems) the part was $6.62 not sure if it would work best of luck.
edit: (Dive gear express) sells a 5 thread and a 7 thread for $8.00 but I'd do a dive shop first.

 

[Aimright]

A few pics of my valve repair from 2020 on my Drager scba valve that had ~10 years of service with the Phoenix Fire Department before I got it. In the one pic that shows both the new and old nylon seat you can really see what ten years of firefighters cranking the valve shut does to the nylon. Fortunately the hard seat was fine and the new parts fixed the leak.

 

[bigHUN]

In my case (Nov.2023) I just finished refilling the 14L scba when this o-ring just disintegrated. It was a real workparty that day.
I had already new DIN valve's in my drawers, ordered (aliexpress) several months earlier waiting for a best time.

Replaced the valves, top up the tanks again to 300.
And one tank valve o-ring popped out from the gap between the tank and a valve.
Empty that one tank again, ordered a slightly thicker o-ring (in couple ID sizes just to make sure).
Working so far since 2023.
I learned along all these years not worth to get emotional with these things. This is why I have three tanks, using one and the other two always on backup.
O-rings comes and goes...

 

[Revoman]

kayaker​

Yep, I tried out local dive shop, no love there at all, they checked all of their bins, no dice. As stated, I believe that it's METRIC, so tougher to locate one here (?).
Thanks for the suggestion!

Aimright​

Yeah, that's quite an owie on the nylon seat! Mine isn't that bad yet as I CAN tighten it up enough to stop the leak, but that is NOT the fix and it'll get nothing but worse,,,,and SOON!
I wasn't able to get to the place Gerry52 suggested today, try again manana.
Thanks for the input (again!).

bigHUN​

I have also had the main tank to valve O-Ring fail, and the replacement, although the correct size, squirted out the side as yours did. Finally got it fixed after two tries.
Thanks for your experience sharing!

mike

 

[kayaker]

Bummer, I'll keep researching as I have two of his valves. BTW I reread your original post, my wife must be right on my memory loss I see you already mentioned a dive shop sorry.

 

[Revoman]

kayaker​

Still doing research online and came across this via AI/Google picture search.
It LOOKS exactly like the Brancato sells, but searching more produced that it's actually made in Taiwan. Topgun told me that they are made in Italy (?).
Gonna send an inquiry today.
Thanks for the dual 'research'!

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mike

 

[Mike_Lenardon]

So you guys know how this thing is put together and how it was repaired.

Made up a split sleeve so I wouldn't crush the threads on the valve.

Chuck it up and indicate in.

Cautiously bore out the nylon seal. And yes those are threads in there. Get the bore close to the thread diameter amd you can unwind the threads.

Yup that's the boring bar

That's the first plug, ended up making a second one because of the thread.

Seal installed and bonded. Back into the lathe.

Brought the oal in. Return to Revoman

 

[rcs9250]

Nice job, Mike!!

 

[Mike_Lenardon]

Nice job, Mike!!

Thanks,

 

[Revoman]

I cannot thank Mike enough for his kindness and efforts to get that valve stop repaired, and in record time!
Plus, he volunteered to do this for a fellow AGN'er!
Such a talent!
I will install this part soon after receiving it back.
Thanks a bunch Mike, MUCH appreciated!!!
AGN'ers ROCK!

mike

 

[kayaker]

Mike excellent work you did on that valve stop

Revoman glad things worked out for you !!