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Brew pressure gauge on Nuova Simonelli Commercial HX
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skydragondave
Senior Member


Joined: 18 Feb 2013
Posts: 167
Location: Ontario, Canada
Expertise: Professional

Espresso: Commercial Only
Grinder: Commercial Only
Roaster: Has Garanti HG5
Posted Sun Mar 3, 2013, 4:35pm
Subject: Brew pressure gauge on Nuova Simonelli Commercial HX
 

Hi all,
As I understand hydraulics, pressure is exerted equally in all directions. So, would I be able to tap into my HX tube at the top to install my brew pressure gauge, or do I need to install it after the gigleur orifice? On a Mac or Program, would this be between the bottom of the three-way solenoid and the group head itself? And does anyone know where I could get a tee that would fit in here?
Thanks very much
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ddubick
Senior Member


Joined: 1 May 2012
Posts: 148
Location: Calgary, Alberta, Canada
Expertise: I live coffee

Espresso: Nuova Simonelli Appia 1Gr
Grinder: OE Pharos, Macap M5, Nuova...
Roaster: Behmor 1600
Posted Mon Mar 4, 2013, 7:51am
Subject: Re: Brew pressure gauge on Nuova Simonelli Commercial HX
 

You should have a pump pressure guage.  During the brew cycle this would equal brew pressure.  As you said pressure is exerted equally, that includes all the way back to the pump.
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skydragondave
Senior Member


Joined: 18 Feb 2013
Posts: 167
Location: Ontario, Canada
Expertise: Professional

Espresso: Commercial Only
Grinder: Commercial Only
Roaster: Has Garanti HG5
Posted Mon Mar 4, 2013, 1:42pm
Subject: Re: Brew pressure gauge on Nuova Simonelli Commercial HX
 

Does the gigleur orifice create any pressure drop when there's flow across it? What's the purpose of the gigleur orifice and how does one calibrate it using different orifice sizes? What are we aiming for when calibrating it?

Thanks again
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ddubick
Senior Member


Joined: 1 May 2012
Posts: 148
Location: Calgary, Alberta, Canada
Expertise: I live coffee

Espresso: Nuova Simonelli Appia 1Gr
Grinder: OE Pharos, Macap M5, Nuova...
Roaster: Behmor 1600
Posted Mon Mar 4, 2013, 2:16pm
Subject: Re: Brew pressure gauge on Nuova Simonelli Commercial HX
 

Sorry, I probably should have let someone else weigh in on this.

Are you interested in seeing the exact pre-infusion pressure ramp?
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skydragondave
Senior Member


Joined: 18 Feb 2013
Posts: 167
Location: Ontario, Canada
Expertise: Professional

Espresso: Commercial Only
Grinder: Commercial Only
Roaster: Has Garanti HG5
Posted Mon Mar 4, 2013, 3:10pm
Subject: Re: Brew pressure gauge on Nuova Simonelli Commercial HX
 

I'll take any help I can get. No worries!
All the machines I own have rotary pumps, so there's very little ramping to speak of. I'd like to have a gauge in there to help me keep an eye on my grind and tamp. I could do that with a naked PF but I'd like to try modding the machine for preinfusion at some point. That's probably another discussion.
A gauge would also help me keep an eye on the gigleur and warn me if it gets plugged or restricted so I'm not running around trying to adjust my grind and tamp when there's a problem elsewhere.
I realise that more experience with these machines will do all of this for me, but until then I need to fill-in some of the blanks. I think having a gauge in there will help me get more consistent shots, rather than having to rely on palate alone. If it's as simple as a tee and a gauge somewhere, why not.
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calblacksmith
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calblacksmith
Joined: 25 Nov 2007
Posts: 7,947
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Tue Mar 5, 2013, 6:04am
Subject: Re: Brew pressure gauge on Nuova Simonelli Commercial HX
 

HI.
To tap into the system, I doubt you will find a threaded T fitting, more than likely, you will need to use a compression fitting style T. Anyplace in the line to the GH will give you the pressure of the brew, regardless of any other devices inline in the system.

I think there may be a pre infusion device of some sort in the brew system. You don't say which NS machine you have.

The chances of something in the machine malfunctioning by getting plugged is pretty small, small enough that I would not give it a second thought. Sure it can happen but these machines are pretty simple as far as they go. I would say that 99.9999% of the time, if there is an issue with the shot, it is in the coffee or methodology of your shot prep.

Go ahead if it makes you more comfortable to install a gauge but the shot pull and result in the cup will tell all anyway.

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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