difference between lauter tun and mash tun
Hello to everyone, I´ve been watching several pictures of lauters and mash tuns, and I can find the diference, pls according to these pictures can u give a hand?
mash tuns are specific mash mixer vessels, where in you add the malt to the water and run the mashing process to sacrafacation. once complete you would transfer in to the lauter tun where the mash is settled recirculated and filtered through itself and the false bottom.
The aggitator in the mash vessel is to stir the mash to allow uniform heating if step mashing is employed. the rakes in the lauter tun are to cut the mash bed to allow uniform run off, loosen the grain bed if too compact, and often act as a plow to remove the spent grain if a spent grain pump isnt involved.
Most Microbreweries use a single vessle for both, saving space and money. Alot of german made microbrewery systems actually mash in the boil kettle, step mash and transfer to the lauter tun, then filter the wort back to the kettle.
Larger breweries need to do multiple productions in a single day, will use a mash mixing tank, lauter tank, boil kettle, whirlpool all seperate vessles to have an on going process, where worts are cast out 1-2hrs apart.
I hope that answers your question
"The aggitator in the mash vessel is to stir the mash to allow uniform heating if step mashing is employed. "
A true mash tun does not have an agitator. The arms shown are discharge rakes only. Mash in a mash tun has to use an isothermal mash, no heating & no agitation, because if you try and heat, you have to mix to ensure even heating. If you mix, you knock the air out of the mash. The mash then sits on the plates and tends to block them. Then you need to have rakes to break the bed up and allow the sparge liquor to percolate evenly through the mash to get good, even extract. In other words - a lauter tun
If you need to step mash, then you need a separate mash mixing vessel with heating and mixing arms, or separate mash mixing and mash heating vessel vessels, and a separate lauter tun.
thanks for the clarification Dick