Ik kwam onderstaand artikel tegen op de site van Wholelattelove.com. Het vertelt over een interview met een technicus die uitlegt hoe de E61 werkt. Voor het hele artikel: hier klikken.
Wat mij evenwel opviel was onderstaand stukje -en met name de 3-de alinea- waarin de werking van het hendeltje wordt beschreven in relatie tot de pre-infusie en het bedienen van de pomp. Ik moet zeggen dat ik het zo niet doe... Hebben ze in de VS een andere E61, doe ik het fout, of heb ik iets niet goed begrepen?:
"Leveraging Your Brewing Process
The brew group’s functions are all activated with a manual lever that has 3 positions. Up turns the pump on. The middle position turns the pump off. And the down position depressurizes the system. It’s that simple.
With the lever up, it raises a piston in the brew group that lets the water pump through the brew group from the boiler at 120 psi using forced heat pressure. The water then circulates around the group head and seeps through the finely ground coffee you’ve tamped into the portafilter which snugly and securely attaches to group head in the grooves that have been cut into the brass. It is leak-proof thanks to the gaskets that form the seal when the portafilter is correctly in place. This initial part of the brewing process is called pre-infusion, which basically primes the grinds for the water to come through them evenly in order to get the most flavor and aroma out of them.
When the coffee begins to drip into your glassware, the lever is then pressed down, which pushes the piston down, causing the rest of the water to plunge through the coffee grounds. At the bottom of the portafilter is the shot basket, which has 180 tiny holes to keep the grounds out of your cup. And above the portafilter, the E61 has a shower screen to keep the grinds out of the system and the machine. These two screens offer dual protection to your machine and your espresso.
When the lever is pushed all of the way down, the brew cycle or extraction of espresso is complete, and you have pulled - extracted - a spectacular shot of espresso as evidenced by the fine crema - or light brown froth - on the top of your shot. It also sucks the coffee moisture from the system and portafilter, making the puck (used coffee grinds) easy to remove and keeping the portafilter cleaner."
Wat denken jullie?
Nieuw inzicht?
1La Scala Butterfly (+ Erics E61 thermometer), Mazzer Major, Gaggia Factory 106 met Tije's koelring, vier tampers (Vlak, American curve, Eurocurve), Gene Café, Aeropress, Kyocera CM-45, ROK-Grinder