beer what size holes to drill for false bottom

Tony

Quality over Quantity

• #1

I am planing on building a ameliorate flase bottom for my mash ton.

The one i have at the moment is made from SS mesh but only uses about 1/two the total bottom area of the mash ton

this tends to lead to compaction due to lots of liquid trying to go out a small space.

I an hoping to make a ii slice imitation botton out of SS perfirated plate similar the ones you buy. I programme to have it over lap and so it can spiral together one time in the ton as it will be bigger than the pigsty in the peak.

my question is....... what size perfirated plate should i exist getting concord of??? how large are the holes in everyone elses flase bottoms.

thank you

Wortgames

'Draught' is not a beer style - information technology's a lifestyle

• #3

Regarding the holes, I reckon about ii - 3mm is pretty skillful. You'll e'er get a few particles fall through only in one case you've recirculated and prepare your filter bed, I don't call up you'll go much coming through a 3mm hole.

But with the design, maybe you could put a hinge in the middle, and so it merely folds in one-half to get information technology in/out?

• #4

I have ii sheets of perf mesh with 4mm holes. I accept overlaped the sheets to become smaller holes, then they are now semi-circulr in shape,

Sheet metal shop will take some stuff lying effectually, especially since everything in the coalfields is made from stainless........you are in the right place for stainless bling Tony....

• #5

Tony, endeavor your local sheetmetal shop for some perforated stainless sheet. Y'all need to calculate the % open area which should exist around 15 to 20%. I have very successfully used a 0.75mm thick sheet with 1mm holes on 2mm centres which gives 24% open area. The canvas tin be supported (and levelled) on inverted cap screws with double nuts.

Your ideal open area would be nearer 15% but yous wont go down to that with perforated sail. Maximum slot width or hole size should exist 0.8mm simply the 1mm hole works well. The Phils false bottom is merely to big in the hole and has an open surface area of 35% from memory.

Wes

Tony

Quality over Quantity

• #vi

I was planing the perfirated sheet option.

I was never going to drill it out myself....... bugger that!

So im looking for canvas with open area of 15 to 20 % with i mm holes

cheers guys

• #vii

Tony

We are currently using 1.9mm holes on almost 3mm centers but like yours it is not the total bottom size of the mash tun. Nosotros tried the ii.9mm hole size sheet simply had trouble with the grains escaping. (we use a hermes organization). I recently bought a piece of i.9mm sheet large plenty to embrace the bottom.

This is expencive stuff. I pay toll from my Sheety and a 400 square cost about $30 as he pays over $400 a sheet. If you can't find some one that has exactly what yous want, I found that RS componants sell all fashion of perferated stainless (and other materials) in modest canvass sizes. Bit pricey but you get exactly what you are later.

Derrick

• #8

Another selection is to employ the sloted stainlees sheet, you should be able to track some down in Singo somewhere.

I know they use a lot of information technology to make coal washery components

• #9

I was looking at this a while ago and plant stainless steel mesh from a security screen door manufacturer / installer. I cant remember the cost I was quoted equally I did not proceed - but I don't call up existence shocked.

Tony

Quality over Quantity

• #10

Well its been a frustrating search for the perfect false lesser.

I rang a prominent steel fabrication firm and they told me i would have to pay for a whole sheet as they would never apply it.

$500....... ouch

I rang RS Componebts and the smallest hole size they had was 2mm but they sold it in 500mm x 500mm pieces....... great i idea. THen they told me i couldnt buy one at $62 each. There was a minimum order of 2 on that item and then information technology was going to cost me $124. I told them to shove it and hung up !!!

I started looking on the net and institute a fabrication mob that makes the stuff and sent them an email request virtually prices ect. No reply as notwithstanding.

I have got the numbers for all the steel fabrication companies in the area and volition band them tomorrow to run into if they take any lying around.

I have deciced the 1mm hole stuff would be all-time now thet i accept seen pictures of it. I can get it 1mm thich so it would be fairly strong too.

And i found an american site that listed the specs on sheet the same every bit pumpys and it has an open area of 41%

thank you

• #eleven

Tony

Most of the places will exist at Mt Thorley....I shall let you exercise the balance.... B)

Tony

Quality over Quantity

• #12

I piece of work most 2 k'southward away from the My Thorley industrial area. I just rang every place that uses, works with or has herd of metallic and they all said NO
I have rang places in sydney, newcastle.... bloody everywhere but all i get is NO
I institute a place in sydney called Metal Mesh that make the perfect preforated plate. 1mm holes, 2mm pitch, 24% open surface area merely i take to buy a 1 meter x one meter plate for $300 and $30 postage.

Man this sucks..........

im on the verge of giving up.

cheers

Wortgames

'Draught' is not a beer style - it'due south a lifestyle

• #xiii

Tony, why not go a fleck of stainless and drill your own holes? They don't need to be as numerous as in perf mesh.

Expect at some of the other designs people have used, copper pipe with slits underneath, that sort of thing. It's the grains that do the filtering, you but demand to concord back the grain and let the liquid become by.

I reckon information technology would exist a iii-beer, i CD job with a bench drill and a sharp chip

If information technology doesn't work well enough the offset time, drill a few more holes before you use it next fourth dimension.

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Source: https://aussiehomebrewer.com/threads/false-bottom-perfitation-size.13428/

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