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Espresso: Espresso Mods and Restorations
What's this part?.....Expobar Restore, Mysterious Spring Valve
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twiztedwords
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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.

Please help.  Thanks

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frcn
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frcn
Joined: 23 Dec 2001
Posts: 3,427
Location: Northern California
Expertise: Professional

Espresso: Vibiemme Domobar Double
Grinder: Mazzer Kony, Baratza...
Vac Pot: Hario, 2 Cory pots, 1 Cory...
Drip: Behmor Brazen, Bunn A10 mod...
Roaster: computer controlled Hottop,...
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.

 
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acasabia
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acasabia
Joined: 17 Oct 2008
Posts: 620
Location: Westchester, NY
Expertise: I live coffee

Espresso: Expobar Brewtus iv-p,...
Grinder: Quamar M80e, Hario slim
Vac Pot: Yama Vacpot, Aeropress,
Drip: french press
Roaster: hot-air popper.
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.

 
Anthony C

Currently pulling:
Path Coffee Roasters (PortChester, NY) Feather in cap espresso.

Cold Brewing:
Gimme! (ithaca, NY) Moca Java

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stefano65
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stefano65
Joined: 30 Oct 2004
Posts: 1,415
Location: Eugene OR
Expertise: Professional

Espresso: Vibiemme,Elektra,
Grinder: Vario,Macap,
Vac Pot: not
Drip: not
Roaster: not
Posted Wed May 7, 2014, 7:30am
Subject: Re: What's this part?.....Expobar Restore, Mysterious Spring Valve
 

my guess is that is a safety valve since the pin is in the UP position

or has mention above an antivacuum but stuck closed

 
Stefano Cremonesi
info@espressocare.com
www.espressocare.com
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twiztedwords
Senior Member


Joined: 6 May 2014
Posts: 3
Location: Springfield, MO
Expertise: I love coffee

Posted Wed Jun 11, 2014, 1:40pm
Subject: Re: What's this part?.....Expobar Restore, Mysterious Spring Valve
 

Found it.....finally.  #persistence

Click Here (www.home-barista.com)
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