Search found 106 matches

by GlennV
October 29th, 2018, 6:34 pm
Forum: Espresso Machines
Replies: 786
Views: 77815

Breville Dual Boiler "Slayer shots"?

No need to do any replumbing to test this. Even just cracked open the hot water tap delivers 4ml/sec - it's not designed for low flow, and why should it be
by GlennV
October 29th, 2018, 6:20 am
Forum: Espresso Machines
Replies: 786
Views: 77815

Breville Dual Boiler "Slayer shots"?

A quick Warning: The needle valve I used is a metering valve, and doesn't have a positive stop. If you use a valve which can potentially stop the flow then I suggest you put an OPV after it to ensure that nothing explodes
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by GlennV
October 29th, 2018, 6:16 am
Forum: Espresso Machines
Replies: 786
Views: 77815

Breville Dual Boiler "Slayer shots"?

The orifice is at the exit of the 3 way, where it attaches to the group. The line for the pressure gauge is tee'd off after that, within the group
by GlennV
October 28th, 2018, 8:35 am
Forum: Espresso Machines
Replies: 786
Views: 77815

Breville Dual Boiler "Slayer shots"?

The gauge does indeed measure pressure at the puck (strictly, at a point between the 3 way and the puck). There's a 1mm orifice in the 3 way valve. I believe it was originally 0.6mm but got blocked too easily. It's possible to put the needle valve assembly between the brew boiler and the 3 way - I d...
by GlennV
October 26th, 2018, 9:02 am
Forum: Espresso Machines
Replies: 786
Views: 77815

Breville Dual Boiler "Slayer shots"?

Nothing so complex - I just ran an extra mains cable out of machine, which is then plugged into a switched extension cable! This was a temporary solution a couple of years ago, but I haven't felt the need to improve on it. I wouldn't bother with the gear pump if I was doing it again, since I don't
by GlennV
October 25th, 2018, 8:38 pm
Forum: Espresso Machines
Replies: 786
Views: 77815

Breville Dual Boiler "Slayer shots"?

The needle valve is a Swagelok Metering Valve 1/8" MNPT - SS-2MA2, other fittings are available. The solenoid valve is a Parker 2 way, there are many types available but not all can resist 10bar, I used a ZB09 146FV, but that's a 230V part. The OPV is a standard brass one, set to 12bar just to relie...
by GlennV
October 25th, 2018, 7:26 pm
Forum: Espresso Machines
Replies: 786
Views: 77815

Breville Dual Boiler "Slayer shots"?

Yes that's precisely how I do it (although I do turn the machine off momentarily when adjusting the needle valve due to the proximity to the heater cables I've settled on a debit of 50ml in 30s, which typically gives first drops around 25s and a completed shot in 45s (pulling back to pre-brew at 40s...
by GlennV
October 25th, 2018, 6:10 pm
Forum: Espresso Machines
Replies: 786
Views: 77815

Breville Dual Boiler "Slayer shots"?

One nice thing about the Breville/Sage dual boiler is that there's plenty of room inside to go the whole hog, with needle valve, solenoid bypass and all: {image} It does result in very fine espresso. Warning: The needle valve used here is a metering valve, and doesn't have a positive stop. If a valv...
by GlennV
January 3rd, 2018, 5:52 pm
Forum: Grinders
Replies: 382
Views: 77312

New Kinu grinders

The only other grinder that I know uses the same burrs as the M47 is the Bezzera BB005. Do you know of any others?
by GlennV
September 16th, 2016, 6:06 am
Forum: Grinders
Replies: 99
Views: 24259

Baratza Sette: The Good, Bad, and Interesting

Interesting indeed. So, Jim, are you saying that shots at the same dose and brew ratio but different grind settings (so one takes 25s and the other 35s for example) will taste the same with this grinder, or at least far more similar than they would with a traditional espresso grinder?