Another 1v recirc build

[boybrewer]

You could always put some lids under each leg to give it a more stable base for the legs to sit on .

 

[CoopsOz]

Anyone bought any of these before? Any chance you could measure external diameter for me? I'm thinking I may have cut my overflow hole a little prematurely.

 

[Matplat]

The OD of 1/2" pipe is a standard.... should be 21.3mm

 

[takai]

Yeah, you are probably right Adr_0. I'll start looking for an alternative.

Good alternative are the stainless steel trivets from Ikea.

Also have some of those tube fittings, will check dia when i head to the garage later today.

 

[Adr_0]

I'm 98% sure that a 22mm hole will be a snug fit for those bad-boys, so 21.something sounds spot on.

 

[CoopsOz]

Thanks gents. I jagged it with my 22mm chassis punch.[emoji3]

 

[Matplat]

This was my attempt at slotting the bigW pot today. I started off doing extra half slots around the inner circle but it all started getting a bit too flexy while i was doing it so i stopped. I also realised that they weren't really required if i was trying to keep an even flow rate across the entire grain bed.

By splitting the slots into an inner and outer ring i managed to retain most of the structural rigidity in the base, it still feels solid enough that i wont have any qualms when using the potato masher!

Cleaning up all the burrs was a pain in the backside, even going over the slots on the inside didn't get them all off. The close up shows all the bits still left behind.

I made the mistake of using an old grinding disc to clean up a few of the slots before i realised and put the new cut off disc back on. Hopefully i took off any contamination but only time will tell. At least its only $20 for a new one!

 

[CoopsOz]

Looks good. I regret not cutting more slots but like you say, it's only $20 to have another go. Have you got anymore pics of your build?

 

[Matplat]

Not yet, my pot is at work awaiting welding... i will be sure to post some up when it is complete.... which should be Monday or Tuesday. I've got the k-mart camping mat ready to go for insulation, 2400W element and LBP knock-off with plumbing. Going to use my stc-1000 for temp control but may step up to a PID controller later on.....

 

[Adr_0]

By the way, if you run into trouble with the stainless, this combination works a treat:
http://www.bunnings.com.au/cigweld-15g-acid-core-soft-silver-solder_p5914026
http://www.bunnings.com.au/bakers-250ml-solder-fluid_p5060192
https://www.google.com.au/webhp?sourceid=chrome-instant&rlz=1C1DVCJ_enAU621AU621&ion=1&espv=2&ie=UTF-8#q=crescent%20soldering%20iron

80W is fine for most thin stuff but feel free to go higher.

I got all of the above from Mitre 10. The Crescent irons are pretty good, but you might chew threw tips with the stupidly corrosive flux.

Paint a bit on, let it sit, then start heating it up and you shouldn't have any dramas. Don't breathe it in or get it in your eyes.

 

[Matplat]

By the way, if you run into trouble with the stainless, this combination works a treat:
http://www.bunnings.com.au/cigweld-15g-acid-core-soft-silver-solder_p5914026
http://www.bunnings.com.au/bakers-250ml-solder-fluid_p5060192
https://www.google.com.au/webhp?sourceid=chrome-instant&rlz=1C1DVCJ_enAU621AU621&ion=1&espv=2&ie=UTF-8#q=crescent%20soldering%20iron

80W is fine for most thin stuff but feel free to go higher.

I got all of the above from Mitre 10. The Crescent irons are pretty good, but you might chew threw tips with the stupidly corrosive flux.

Paint a bit on, let it sit, then start heating it up and you shouldn't have any dramas. Don't breathe it in or get it in your eyes.

Do you mean to solder instead of weld the stainless? I've got that solder fluid and a blow torch already...

 

[Adr_0]

Do you mean to solder instead of weld the stainless? I've got that solder fluid and a blow torch already...

MAPP fuel is too hot for the flux you use to solder stainless, but it's good for brazing aluminium
Standard propane is best, but you can still obviously crust up the flux and you won't make a join. So you still have to be careful to make sure you keep your distance and be patient.

If the metals you will join are only a couple of mm you can use a soldering iron successfully and I highly recommend trying this.

 

[takai]

Measured the pipe fitting on my way out this morning, 22mm might be a bit generous:

 

[Matplat]

Was that an ebay special?

The 1/2" bsp sockets I got off ebay were a long way from standard dimensions also....

 

[CoopsOz]

Guess I'll just have to wait and see.

 

[TheWiggman]

Major diameter of 1/2" BSP is 20.95mm. What you have there is about 20.22mm, so it's a bit undersize. Nothing an o-ring or washer can't fix.

 

[takai]

If it is for the overflow pipe it doesnt matter much if it leaks, so long as the hole isn't big enough to pass grain through

 

[Benn]

With a 1 vessel set up, is there an advantage other than less mess of a malt pipe (eg. Big W pot) over a bag or basket for containing the grain? Is there a real need to sparge with a 1V recirculating rig?

 

[Matplat]

I am of the understanding that, as the wort is being constantly filtered, you get clearer wort with less trub.... also with a reciculating system, you have a much more even temperature through the grain bed.

You probably could do a no-sparge, but you may sacrifice a few efficiency points.

 

[Benn]

Thanks Matplat,
...I gotta stop procrastinating and start building.