New Slayer espresso machine - Page 10
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- Posts: 9
- Joined: 15 years ago
There will be a pressure drop across the orifice, but it's very dependent on the flow rate- this is shown when engaging a group with a gicleur and no coffee as the pressure in the boiler rises to 9 bar while the group pressure is obviously zero; a pressure drop of 9 bar across the gicleur. Without an extremely tiny orifice, however, the pressure probably wouldn't drop at all (like it doesn't with, say, 0.6mm gicleurs) at espresso flow rates. The slayer probably does something more clever (like has an OPV somewhere perhaps?) to lower its pre-infusion/1st lever position pressure.
Incidentally, there seems to be a Brasilia machine that makes roughly the same claims as the Slayer- see http://www.caterersearch.com/Articles/2 ... ology.html, using two solenoid valves to open different brew pathways.
EDIT: Actually, couldn't you get a Slayer-like effect just by upping line water pressure to 4 bar on a rotary pump paddle/E61 machine? I expect there's something I'm missing though.
Incidentally, there seems to be a Brasilia machine that makes roughly the same claims as the Slayer- see http://www.caterersearch.com/Articles/2 ... ology.html, using two solenoid valves to open different brew pathways.
EDIT: Actually, couldn't you get a Slayer-like effect just by upping line water pressure to 4 bar on a rotary pump paddle/E61 machine? I expect there's something I'm missing though.
- networkcrasher
- Posts: 606
- Joined: 16 years ago
And you'd be wrong. I've used the machine, and while you can't dial in an exact pressure, given the configuration of all the boilers, it still produced one of the best shots of espresso I've ever had. Back to back to back, I might add.cpl593h wrote:This thread is a little old, but I have some things to add because I have actually used this machine, which no one else in this thread can claim.
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- Posts: 386
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Interesting concept in the Brasilia machine but what they appear to be doing is allowing user selectable two stage infusion. By selecting a different duration for each of the two stages you could create a "profile" of sorts but I wouldn't go so far as to call it "pressure profiling".jcj wrote: Incidentally, there seems to be a Brasilia machine that makes roughly the same claims as the Slayer- see http://www.caterersearch.com/Articles/2 ... ology.html, using two solenoid valves to open different brew pathways.