Weldless 4 inch keg ferrule....

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Re: Weldless 4 inch keg ferrule....

Postby bluc » Fri Jun 12, 2020 7:17 pm

Or oval internal nut :O)
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Re: Weldless 4 inch keg ferrule....

Postby Birdman85 » Fri Jun 12, 2020 7:21 pm

In this modern age you could try and see if it will work with a 3d printer first.
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Re: Weldless 4 inch keg ferrule....

Postby RC Al » Fri Jun 12, 2020 7:57 pm

You mean like winding a spring in to the hole? almost like a helicoil? nice idea, but the only way i could see that working is if it was soldered solid afterwards?
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Re: Weldless 4 inch keg ferrule....

Postby bluc » Fri Jun 12, 2020 8:40 pm

Like a spring but not a spring, a multi segment tri clamp with play in joins to allow it to roll up smaller then it actually is. Each segment solid not flixable so when screw is tightened it applies pressure same as a 2 section one..
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4 plate 4" bubbler, 600mm packed section

Re: Weldless 4 inch keg ferrule....

Postby Tanker » Fri Jun 12, 2020 8:50 pm

RC Al wrote:Bit of a necro post..

The simple fact is you need a hole bigger than the 4" ferrule to get the nut in, on a standard keg this limits you to a 1" bsp nut, and impossible without welding for anything bigger

If you had a milk can or existing 6" opening fine, a ss 4" bsp nut starts at around $50, I dare say you wouldnt get much change out of $150-200 for the whole thing, makes welding look pretty attractive


With respect, i beg to differ, i have seen a very clever weld less bulk head that allows a two inch bulkhead to be fitted in a two inch hole with only access from one side, i can't see why it couldn't be scaled up to 4,6,8in etc. the one caveat is that this one was made for a flat surface. but with the right set of press plates anything is possible.
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Re: Weldless 4 inch keg ferrule....

Postby RC Al » Fri Jun 12, 2020 10:49 pm

Got any leads on that? or a pic? I like clever engineering

ok its called a blind bulkhead fitting, the big assed piece of rubber used counts it out....
Last edited by RC Al on Fri Jun 12, 2020 10:57 pm, edited 1 time in total.
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Re: Weldless 4 inch keg ferrule....

Postby Tanker » Sat Jun 13, 2020 8:10 am

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Re: Weldless 4 inch keg ferrule....

Postby bluc » Sat Jun 13, 2020 8:59 am

Pretty neat :handgestures-thumbupleft:
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50l keg boiler 4" still mount 4" sight glass 1" drain..
4 plate 4" bubbler, 600mm packed section

Re: Weldless 4 inch keg ferrule....

Postby dans.brew » Sat Jun 13, 2020 1:29 pm

That is some pretty clever thinking right there! :handgestures-thumbupleft:
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Re: Weldless 4 inch keg ferrule....

Postby RC Al » Sat Jun 13, 2020 1:45 pm

Nice, looks easy enough to achieve

getting a natural cork gasket would be the hardest bit, but very far from impossible

Good share mate :handgestures-thumbupleft:
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Re: Weldless 4 inch keg ferrule....

Postby bluc » Sat Jun 13, 2020 3:03 pm

Or silcone sheet
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equipment: 2" pot with 2" shotty 400mm long 5x 1/2" on a t500 boiler.
50l keg boiler 4" still mount 4" sight glass 1" drain..
4 plate 4" bubbler, 600mm packed section

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