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$10 portafilter brew pressure gauge
Rancilio Silvia - How to
Step by step guide for easy brewing and steaming with the Rancilio Silvia
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Discussions > Espresso > Machines > $10 portafilter...  
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DaninMaryland
Senior Member


Joined: 3 Jan 2013
Posts: 79
Location: US
Expertise: I love coffee

Espresso: V2 Silvia
Grinder: Vario-W
Posted Thu Jan 24, 2013, 8:58am
Subject: Re: $10 portafilter brew pressure gauge
 

i have the Silvia and standard dry gauge was fine.  maybe a bad seal of the PF could cause some jumping a bit?  if a little air is escaping when hitting high pressures, it could cause some release of pressure, but a PPFFFTTTTT sound should be coming from the PF seal i would think.  I dont think those gauges are sensative enough to record the small variations of pressure from the pumps.  I would suspect a bad gauge and/or seal issue
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sleepdance
Senior Member
sleepdance
Joined: 27 Feb 2007
Posts: 98
Location: USA
Expertise: I love coffee

Espresso: Faema C85
Grinder: La Pavoni Zip
Vac Pot: Yama
Drip: Newco OCS8
Roaster: Behmor
Posted Thu Jan 24, 2013, 12:39pm
Subject: Re: $10 portafilter brew pressure gauge
 

I think you guys nailed it. No matter how hard I tighten the portafilter, I still get a few drips from the group gasket area when the gauge is connected. The drips seem to coincide with the degree of jumping that I'm getting. I'll have to try it on another portafilter, or maybe it's time to change the group gasket again.
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DaninMaryland
Senior Member


Joined: 3 Jan 2013
Posts: 79
Location: US
Expertise: I love coffee

Espresso: V2 Silvia
Grinder: Vario-W
Posted Thu Jan 24, 2013, 1:00pm
Subject: Re: $10 portafilter brew pressure gauge
 

might be able to get a seal with a bunch of teflon tape.
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sleepdance
Senior Member
sleepdance
Joined: 27 Feb 2007
Posts: 98
Location: USA
Expertise: I love coffee

Espresso: Faema C85
Grinder: La Pavoni Zip
Vac Pot: Yama
Drip: Newco OCS8
Roaster: Behmor
Posted Thu Jan 24, 2013, 1:27pm
Subject: Re: $10 portafilter brew pressure gauge
 

DaninMaryland Said:

might be able to get a seal with a bunch of teflon tape.

Posted January 24, 2013 link

I have tape on the gauge and reducer coupling connections, but the leak is from above at the group. The threading is different on my e61 portafilter, so I can't test the gauge on it.  It's almost certainly the group gasket though.
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DaninMaryland
Senior Member


Joined: 3 Jan 2013
Posts: 79
Location: US
Expertise: I love coffee

Espresso: V2 Silvia
Grinder: Vario-W
Posted Thu Jan 24, 2013, 1:54pm
Subject: Re: $10 portafilter brew pressure gauge
 

sleepdance Said:

I have tape on the gauge and reducer coupling connections, but the leak is from above at the group. The threading is different on my e61 portafilter, so I can't test the gauge on it.  It's almost certainly the group gasket though.

Posted January 24, 2013 link

yeah, i read earlier about someone adding teflon tape around the edge of the portafilter to try and get it to seal.
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sleepdance
Senior Member
sleepdance
Joined: 27 Feb 2007
Posts: 98
Location: USA
Expertise: I love coffee

Espresso: Faema C85
Grinder: La Pavoni Zip
Vac Pot: Yama
Drip: Newco OCS8
Roaster: Behmor
Posted Thu Jan 24, 2013, 8:05pm
Subject: Re: $10 portafilter brew pressure gauge
 

DaninMaryland Said:

yeah, i read earlier about someone adding teflon tape around the edge of the portafilter to try and get it to seal.

Posted January 24, 2013 link

Thanks for the suggestion. I'll try that if the seal isn't the culprit.
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RapidCoffee
Senior Member
RapidCoffee
Joined: 4 Dec 2004
Posts: 1,931
Location: Rapid City, SD
Expertise: I love coffee

Espresso: La Spaziale S1
Grinder: Mazzer Robur
Vac Pot: Yama
Drip: misc
Posted Sun Jan 27, 2013, 11:37am
Subject: Re: $10 portafilter brew pressure gauge
 

Highly relevant post on H-B, especially for owners of machines with vibe pumps:
Click Here (www.home-barista.com)

If you don't want to watch the video, here is the punch line:

In short, the Bezzera factory claims that smaller vibratory pumps need to be adjusted to a higher pressure than larger rotary pumps. I.E., they set the vibe pumps in home machines to 11 Bar and the Rotary pumps in Commercial machines to 9 Bar.

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sleepdance
Senior Member
sleepdance
Joined: 27 Feb 2007
Posts: 98
Location: USA
Expertise: I love coffee

Espresso: Faema C85
Grinder: La Pavoni Zip
Vac Pot: Yama
Drip: Newco OCS8
Roaster: Behmor
Posted Thu Jan 31, 2013, 4:49pm
Subject: Re: $10 portafilter brew pressure gauge
 

This setup does work perfectly on the Rancilio Audrey and Silvia as others reported. After changing the group gasket the dry gauge worked flawlessly, with just a bit of fluctuation at the highest point of pressure (10.9 bars).

RapidCoffee Said:

set the vibe pumps in home machines to 11 Bar...

Posted January 27, 2013 link

Perfect timing with that info. It could explain why my Audrey was set to almost 11 bars.
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