jwoodyu Senior Member Joined: 31 Dec 2010 Posts: 857 Location: Michigan Expertise: I live coffee
Espresso: Allex Duetto II Grinder: Mazzer Major
Posted Sat Oct 19, 2013, 1:40pm Subject: Leverheads, how does a spring lever actually work?
So forgive me being the the great unwashed when it comes to lever's but if I want to understand more. So when the handle is pulled down it puts line pressure on the the puck for a presoak of how ever long i want, then moving the handle up forces water through puck using pressure from springs which are calibrated? Is there even an instant when pressure is reduced from line pressure to 0, or even a slight vacuum, while moving the handle to the up position?
Yes i have a reason for leaving SCG off my list, yes it is my opinion, yes it is subjective as opinions are by definition, no don't start a flame war because you disagree.
crazy4espresso Senior Member Joined: 19 Jan 2008 Posts: 148 Location: Toronto Expertise: I love coffee
Espresso: Silvia, La Pavoni... Grinder: Pharos
Posted Sat Oct 19, 2013, 3:49pm Subject: Re: Leverheads, how does a spring lever actually work?
My Faemina is a home spring lever espresso machine. I can tell you a bit about how it works, which is a bit different than some of the others. It features an ingeniously designed two part piston, which basically allows for a mechanical pre-infusion. Basically you only need to pull the lever about an inch for the piston halves to separate and allow water to gravity feed down into the brew chamber. Pulling down the lever completely will load the spring. When you release the lever the spring provides the brew pressure in a declining profile, beginning at about 6 bar and decreasing from there. This provides amazing layered shots which I much prefer over pump machines. My pump machine lies forgotten in the corner. Once you go lever you never go back.
Symbols: = New Posts since your last visit = No New Posts since last visit = Newest post
Forum Rules: No profanity, illegal acts or personal attacks will be tolerated in these discussion boards. No commercial posting of any nature will be tolerated; only private sales by private individuals, in the "Buy and Sell" forum. No SEO style postings will be tolerated. SEO related posts will result in immediate ban from CoffeeGeek. No cross posting allowed - do not post your topic to more than one forum, nor repost a topic to the same forum. Who Can Read The Forum? Anyone can read posts in these discussion boards. Who Can Post New Topics? Any registered CoffeeGeek member can post new topics. Who Can Post Replies? Any registered CoffeeGeek member can post replies. Can Photos be posted? Anyone can post photos in their new topics or replies. Who can change or delete posts? Any CoffeeGeek member can edit their own posts. Only moderators can delete posts. Probationary Period: If you are a new signup for CoffeeGeek, you cannot promote, endorse, criticise or otherwise post an unsolicited endorsement for any company, product or service in your first five postings.