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2-boiler RIMS system 50 liters (planning)

Contribution from marsh brewer ┬╗Tue Apr 18, 2017 9:12 pm

Dear brewing community,

I'm brewing on the BM20 for the third year now. For a long time now, I have been plagued by the desire to upgrade to a 50 liter system. The Braumeister is undisputedly a really great device, so it would make sense to look around for a BM50. But there are a few reasons that make me think about a specially designed system. Most of all they are

* the high purchase price
* the (for many negligible) rather low yield (spacer tube has not brought any measurable improvement)
* the sensitivity of the malt pipe system in relation to the crushing (despite Mattmill Compact I could not find an optimal setting conditioned and unconditioned, the flour proportion is always quite high)
* In my opinion, the cleaning effort is quite high (heating coil)
* the fact that a whirlpool is not possible and residual wort with hops and hot trub always remains in the kettle (I use monofilament filters, but don't find it really convenient because it "seals" very quickly in the end.
* higher original wort is only possible to a certain extent and then only through tricks

For days now I've been looking around for different concepts and one thing in particular did it to me. It is a 2 boiler system in which the wort is pumped in a circle (2 vessel RIMS). There are some interesting YouTube videos about it, like this one here: https://www.youtube.com/watch?v=VjGkS0M0LgY
But I would take a manual Hendi and first rather forego some welded threads in order to try out the system before you look for a welder for me.

Such systems are also sold commercially as a complete solution (more in the USA), such as the "Blichmann brew easy" https://www.youtube.com/watch?v=3IhekEM71C8

Temperature control is a fine thing, but that's not my concern at the moment. I would certainly start manually. The questions I ask myself are:

* does someone operate such a system and is a replica worthwhile from your point of view?

* On the one hand there is the risk of negative pressure (compacted mash, warped lauter plates) on the other hand it seems to work well in many cases. Does anyone have experience with a pump "under the" lauter plate?

* Do you have any idea why no additional water is used in such systems? You could easily feed in the spill from a third boiler by simply hanging the pump inlet on the spill boiler (e.g. from a boiler or from the BM20 - almost decadent)

* I thought of a 70 liter kettle and a 50 liter mash kettle (too big?). Possibly even a 50 liter thermal port. It should keep the temperature very well when it comes in at the right temperature from above. In addition, I always have the option of a combination rest in the Thermoport. The Blichmann systems provide the following dimensions: 19 L deflection: 28 liters of mashing 38 liters of boiling; 38 liters deflection: 56 L mashing, 75 liters boiling, 75 liters deflection: 113 L mashing, 113 liters boiling. A linearity cannot be derived here. The boilers also appear to be quite large to me. The middle system is pretty much my dimensions. How can it be that I can only get 38 liters of wort from it. The brew kettle in the Blichmann systems would be about half full after boiling. What could be behind that? Overflow prevention during mashing?

* At HuM, the Mattmill includes plaster plates, saying that they are not suitable for such negative pressure systems. Probably for disclaimer reasons. Does anyone know what requirements a lauter plate must meet for this application? Maybe someone has a tip.

* You can see pumps in a wide variety of sizes, shapes and price segments (and colors ). It will be important to regulate the flow. With this economy arm from Blichmann you would have an automatic system, as the valve is regulated by the float itself. Can this damage a pump? Does anyone have a tip?

I would be very happy about your assessments!

Love from
Michael