hi
If you are interested, I would like to get your opinion, while I was playing around with the pump, the method I will explain below came to my mind.

The rough working principle of the solenoid pump is that the piston inside the pump is flooding with water, I realized a method that will shorten the distance it moves back and forth, and I added spacers suitable for the purpose, and thanks to these parts, I adjusted the pressure in the group head of the Arçelik espresso machine to 10bar.

In fact, I can say that I reduced the work done by the piston with my intervention. Also, there were some differences when using it, for example, there is no clogging in fine grinding as before. I think it is because the flow of water has decreased and the sound of the pump has also decreased. (The amount of water flowing from the group in 1 minute before the intervention was 375ml, now it's around 225ml), I've been using it 3 times a day for 3 weeks, and I haven't observed any change in the operation of the pump.

In these, the parts that adjust the distance show where I put it in the video I left below in 2:35 seconds



sorry i forgot to tighten the portafilter
assembly picture of parts
<< image 9l571he.jpg >>

Parts to be 3D printed
https://s7.dosya.tc/server20/apdsyv/ulk ... d.rar.html

I'm sorry for my bad english

I would not use printed parts in contact with food. They are not food-safe.

Is there a reason you didn't just adjust the OPV?

Thank you i forgot to write:
The printed parts do not come into contact with the water.
positioned above the pump

Really clever! You could put spacers at both ends of the travel to adjust both the max flow and max pressure. And you could conceptually add a knob at one end that used a needle through the inlet to limit the piston travel and control the flow. Always nice to see people thinking way outside the box.

Ira