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Occasional charity fundraiser
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i_am_miguel
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Joined: 15 May 2003
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Posted Sun Oct 7, 2012, 7:41am
Subject: Occasional charity fundraiser
 

Hi everyone...my wife asked me an interesting question.  We are heavily involved in a charity and
have fundraisers on a regular basis.  She asked if I could make espresso and pretty lattes at them next year.
I have a quickmill silvano and k3 grinder.  I am guessing 100 coffees in a 2 hour period.
If it is only 2-3a time a year should i sell my silvano and upgrade  or do you think I'd be fine since it isn't on a regular basis.
Any silvano owners out there ever try this?
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CoffeeMills
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CoffeeMills
Joined: 21 Feb 2012
Posts: 32
Location: USA, Canada
Expertise: Professional

Espresso: la Pavoni Professional
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Posted Sun Oct 7, 2012, 8:17am
Subject: Re: Occasional charity fundraiser
 

Hi,

The QM Silvano is equipped with two vibration pumps and thermo fuses.
These pumps will overheat under high demand such as 50 shots / hour.  So near the 20th latte, the pumps shut down for cooling.  
A commercial espresso machine with rotary vane pump is more efficient for high demand.  These pumps come in 110V and 220V ac power.  My 2 cents - Ranccilio Vivaldi S1 dual boiler espresso machine can meet high volume demand with ease.    

OR

Continue using QM under high demand with a one minute break between each drink.  This should be enough time to cool down pumps.

OR

Buy another Silvano to alternate the demand load.

Keep up the great charity fundraising !

 
Coffee Mills
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GVDub
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Joined: 25 Jan 2008
Posts: 880
Location: Los Angeles, CA
Expertise: I live coffee

Espresso: Londinium I, Arrarex...
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Roaster: Behmor 1600+
Posted Sun Oct 7, 2012, 8:20am
Subject: Re: Occasional charity fundraiser
 

So, with 100 drinks over 2 hours, that's roughly one shot every 1:20.  Figure grinding time, prep time and extraction time, then figure out how long it takes the Silvano to cycle from brew to steam and back for milk drinks (which, unless the crowd are pretty hardcore, will be the bulk of your drinks) then time yourself making 4 back to back lattes.  I don't think it's even vaguely possible. A good plumbed-in, single-group HX machine would be hard pressed to keep up. Not to mention a barista who's not used to dealing with a rush.
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Coffeenoobie
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Coffeenoobie
Joined: 11 Dec 2011
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Posted Sun Oct 7, 2012, 9:40am
Subject: Re: Occasional charity fundraiser
 

I would look into having them rent a multi group machine for the event and see if you can get at least one or 2 other baristas.

 
Coffeenoobie

Buying advice: GRINDER GRINDER GRINDER. Don't cheap out on the grinder.

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