twiztedwords Senior Member Joined: 6 May 2014 Posts: 3 Location: Springfield, MO Expertise: I love coffee
Posted Tue May 6, 2014, 9:07pm Subject: What's this part?.....Expobar Restore, Mysterious Spring Valve
I recently descaled & completely restored an Expobar Amarillo Verde. My first espresso machine restore! Everything went great until I had it all pieced back together & saw this little valve sitting on my work bench. I'm guessing it has something to do with the grouphead, but I don't know for sure. It has no threads & seems to fit perfectly in one of the group copper water line.
Posted Tue May 6, 2014, 9:48pm Subject: Re: What's this part?.....Expobar Restore, Mysterious Spring Valve
Appears to be an anti-vacuum valve. Often there ware mounted on the boiler or on some fitting on the boiler. They allow air to escape during the initial heating of the boiler when the machine is first turned on. The flow of air then pushes the little valve inside closed and then heating continues and pressure can build. It alleviates false pressure which confuses the pressurestat.
Posted Wed May 7, 2014, 6:45am Subject: Re: What's this part?.....Expobar Restore, Mysterious Spring Valve
I believe that is the vacuum valve for the steam boiler. odd that its not threaded.. do you have a photo of the machine? I've never seen the amarillo verde, and expobar tends to use different names in different countries.
Currently pulling: Path Coffee Roasters (PortChester, NY) Feather in cap espresso.
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.