Thread: Coffee Enthusiasts

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Some day in the future I will cast a whole new seal, but for not it is working and I am happy.

I stopped to think..what about a thin coat of RTV around the inside wall of the seal doughnut???

~Richard

Originally Posted by Geezer

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I stopped to think..what about a thin coat of RTV around the inside wall of the seal doughnut???

~Richard

That is basically what I did, I built the ribs back up with rtv soaked sisal/jute then over coated with a thin layer. It is working well so far.

Finally remembered to bring the “camera” over to my friend’s house for the periodic, weekly siphoning of his Speedster. Mine lacks the automatic shot-timer (top-center) and a small pressostat upgrade. And, that’s my grinder hanging out to the left side for any single-dosing needs. Grant wired his Dogé Conico to a timer control box set to yield about 19 grams — just press the green for go button!









Progressive preinfusion indicator button atop right extends outward as brewing preinfusion begins, peaking at around 1” out and equal to full line pressure at the grouphead (so, “mildly” from 0 atm to say 3.0 atm in ~ 10-12s).

Lowering the notched drive handle about halfway down, then moving the whole handle laterally leftward, places its notch over the a hook for preinfusion. Or, you simply hold the handle halfway down if you like.

Extending the handle fully downward, the commercial-duty rotary pump (housed in his basement thanks to one serious OEM extension kit he bought; mine was under sink) kicks on to bring group pressure immediately to 9.0 atm (typical, not gospel) until brewing cycle has completed. Lever can be locked under the preinfusion hook or held until barista finishes pulling the shot.

The levering mechanism Kees engineered is phenomenally brilliant using 2 plunger-actuated switches (all steel w/ steel contact wheels, no plastique, no sirree!) for the brewing features. Will need to take an interior right-side shot someday to show that engineering off.

Bloody hell. That's some machine and setup!

Amen to that!
Awesome kit.