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dissapointo t1_iyoq38h wrote

You can look into a dc voltage pump, an actuated valve, or a few other configurations. What kind of flow and pressure variations are you looking for? Are you pumping hot or cold water?

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Knackmanic OP t1_iypl3p0 wrote

Cold water to a boiler. When you do the coffee shot, there's a variation of the restriction. The goal is also to push with higher pressure initially (preinfusion), then lower during the infusion.

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