Linea Mini needle valve kit 2.0

580,00 735,00  inkl MwSt.



The Linea Mini is a great machine. It only has a problem at the factory: the paddle only functions as an on / off switch on the models until the end of 2019. The new models have an attitude that is similar to that of a PI, but in terms of their function they by no means exploit the potential of the machine.

New in version 2.0:

  • Drilling is no longer necessary. All the required mounting points are now prepared in the bracket.
  • Even more detailed installation instructions. I have added the instructions based on the feedback from previous happy customers.

My mod

I use the experience from my self-built espresso machine and have developed a conversion kit for the Linea Mini. This uses a needle valve to affect flow rate during PI. The valve is located directly in front of the brewing group, so that a change in the flow rate has an immediate effect. The conversion converts the "fake paddle" into a full paddle. The middle position is the pre-infusion position. There the water must flow through the needle valve, so that the flow rate is reduced to the set value. Both the duration of the pre-infusion and the flow rate can be freely selected. After the pre-infusion, the paddle is pushed further to the left. The valve switches and the regular flow rate and pump pressure act on the puck. Optionally, the flow rate can also be reduced here by using a 0.6mm gicleur.

Extension to display the current brewing pressure:

  • With this extension, the existing pressure gauge is connected directly behind the brewing group so that the influence of the needle valve becomes visible.

You can see how it works in this video:

What are the advantages of the conversion?

The low flow rate during pre-infusion allows the puck to saturate slowly and with almost no pump pressure. This is comparable to the so-called blooming in filter coffee. This makes the extraction smoother and reduces the susceptibility to channeling. In addition, we can adjust two more variables through the conversion. The flow rate and duration. For example, we can grind finer if we increase the duration of the pre-infusion. The great advantage of the two-stage system is its reproducibility. Once you have found the right settings for a variety, you can reproduce the shots very easily.

What's in the kit?

  • fully assembled wiring harness
  • all required hydraulic components and fittings
  • Teflon hose
  • a milled holder for the paddle
  • detailed assembly instructions in German and English

What do you need to do the conversion?

The conversion can be carried out very easily by anyone. I like to compare it to building a shelf. You need a little time, enthusiasm and the right tools. If you do all the steps in the right order, that's half the battle.
Required tools & material

  • a set of screwdrivers
  • a set of open-ended wrenches
  • Liquid sealant to seal the hydraulic components.
  • If necessary, an electrician for the electrical connection of the wiring harness, if you are not familiar with the electrical system.

How long does the installation take?

The time it takes to just assemble the kit is 2 to 3 hours for a skilled craftsman. Inexperienced screwdrivers should calculate with an afternoon. In addition, there is the drying time of the liquid sealant.

What do I do if I get stuck at one point despite detailed instructions?

So far everyone has been able to carry out the conversion successfully. If you have any questions, I am available by e-mail as well as by phone. After I know the inner workings of the Linea Mini very well through various modifications, we will find the problem in a very short time.

Weight 0,850 kg

Feinregelventil (+35 €), Präzisionsventil (+95 €), Standard

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