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Discussions > Espresso > Espresso Mods > Rancilio silvia...  
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rays
Senior Member


Joined: 23 Feb 2014
Posts: 4
Location: Vancouver bc
Expertise: I like coffee

Posted Wed Mar 19, 2014, 1:16pm
Subject: Rancilio silvia opv
 

hi guys, I got a used rancilio silvia which was produced in Nov 2007, i'd like to adjust the OPV as many people said they came with 10 bars or more.
However I don't have a gauge, and I cannot unscrew my portafilter spouts.

So I used a blank basket and let the machine run for 1 minute to check the return line, only 180ml of water returned, what could be wrong? Is my pressure way off?


also, I replace the shower screen and the gasket, now I have to tight the portafilter really really hard to prevent leak, what could be wrong?

Thanks
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Burner0000
Senior Member


Joined: 28 Jul 2011
Posts: 1,076
Location: Cambridge, Ontario Canada
Expertise: Professional

Espresso: Rancilio Silvia, VFA Expres...
Grinder: Macap MX/VFA N1464/Kyocera...
Drip: Manual Drip, French Press
Roaster: Behmor 1600 / Sonofresco
Posted Wed Mar 19, 2014, 1:50pm
Subject: Re: Rancilio silvia opv
 

rays Said:

hi guys, I got a used rancilio silvia which was produced in Nov 2007, i'd like to adjust the OPV as many people said they came with 10 bars or more.
However I don't have a gauge, and I cannot unscrew my portafilter spouts.

So I used a blank basket and let the machine run for 1 minute to check the return line, only 180ml of water returned, what could be wrong? Is my pressure way off?


also, I replace the shower screen and the gasket, now I have to tight the portafilter really really hard to prevent leak, what could be wrong?

Thanks

Posted March 19, 2014 link

PIDSilvia.com has a built portafilter retrofit pressure gauge you can use or you can look up the parts and build one yourself.  I haven't tested the return line on mine ever so I can't help you there.  The leaky group is common in Silvia's and can be easily fixed with a new group gasket.  To unscrew the spouts you need to heat up the portafilter.  I do this and wrap it in a towel so I can pry the spout off with pliers and not ruin the finish.  After this don't fully tighten the spout so you can remove it by hand.

Have you tried pulling shots on the machine yet?  If your getting good espresso theres no need tomess with any of the internals.
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D4F
Senior Member


Joined: 15 Mar 2012
Posts: 2,005
Location: USA
Expertise: I like coffee

Espresso: Gaggia Classic PID
Grinder: Baratza Forte-AP
Posted Wed Mar 19, 2014, 2:22pm
Subject: Re: Rancilio silvia opv
 

You may be familiar with the graph of flow vs pressure.

Click Here (www.home-barista.com)

That method works fairly well if you don't want to put together a gauge.  180 ml/min looks like about 11 bar.  All flow is based on having a clean descaled machine working properly.

If you are having leak problems, check the install, and check to be sure that you got the correct thickness of gasket.  Most new gaskets in machines will become tight with less rotation of the PF as they are still thick and pliable, not yet compressed.

 
D4F also at
http://www.gaggiausersgroup.com/
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rays
Senior Member


Joined: 23 Feb 2014
Posts: 4
Location: Vancouver bc
Expertise: I like coffee

Posted Fri Mar 21, 2014, 10:37pm
Subject: Re: Rancilio silvia opv
 

D4F Said:

You may be familiar with the graph of flow vs pressure.

Click Here (www.home-barista.com)

That method works fairly well if you don't want to put together a gauge.  180 ml/min looks like about 11 bar.  All flow is based on having a clean descaled machine working properly.

If you are having leak problems, check the install, and check to be sure that you got the correct thickness of gasket.  Most new gaskets in machines will become tight with less rotation of the PF as they are still thick and pliable, not yet compressed.

Posted March 19, 2014 link

Thanks for the info, I adjusted my OPV today and it is returning 260ml now(approximately), based on the graph that should be 9 bars. Should I keep it at 9 bars or 9.5?
Hopefully I can make better tasting coffee now.

the gasket stops leaking now, I guess it just needs some time to break in.
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D4F
Senior Member


Joined: 15 Mar 2012
Posts: 2,005
Location: USA
Expertise: I like coffee

Espresso: Gaggia Classic PID
Grinder: Baratza Forte-AP
Posted Sat Mar 22, 2014, 9:21am
Subject: Re: Rancilio silvia opv
 

rays Said:

Should I keep it at 9 bars or 9.5? Hopefully I can make better tasting coffee now.

Posted March 21, 2014 link

Close enough, now practice :)  It is less about an exacting number than skills now.  The group gasket should have been compressible and not need "break in."  Perhaps less prone to leak with the pressure set down.

 
D4F also at
http://www.gaggiausersgroup.com/
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faster
Senior Member


Joined: 27 May 2013
Posts: 89
Location: France
Expertise: I live coffee

Espresso: Rancillio Silvia-PID
Grinder: Rossi RR45
Roaster: Homemade drum roaster
Posted Sun Mar 23, 2014, 12:49am
Subject: Re: Rancilio silvia opv
 

I replaced gasket on my Silvia and you can feel the soft rubber as you lock in the PF.
Obviously NO leaks.
Big difference from the hard gasket that I replaced. (2 years old but no leaks)
I hope you got a genuine replacement gasket (with the grooves)
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