Major Bellman stovetop steamer breakthrough! - Page 9

Beginner and pro baristas share tips and tricks for making espresso.
Napy123

#81: Post by Napy123 »

Bluenoser wrote:If you weigh the milk before and after steaming.. along with the seconds it takes to steam (and the beginning and final temp).. you can calculate the 'dryness' of your steam and compare it to other methods.. Generally I get about 10% water added when steaming to 140F. So for 200g of milk, my Pro500 with 2L boiler and 1.3bar of steam pressure adds about 20g of water.. This is not bad..

Wow! I didn't think of that... that's a really good idea. I'll have to do some weight comparisons next.

So it seems in your case you start with 200g and end up with a final weight of 220g?

Very interesting...

Napy123

#82: Post by Napy123 »

DaveB wrote:
My takeaway is that it might be a combination of purging air from the device as well as cooling the wand, which is super-heated as it's in direct uninsulated contact with the boiler.

I'm genuinely curious why the cooling of the steam wand would help in creating better steamed milk? I really don't know too much so just wondering why or how that would affect things.

I can imagine that a hot steam wand tip would lead to a faster steaming milk since the milk temp would increase faster? If so, then I can imagine the primary (or only?) difference between a hotter vs a colder steam wand tip means that you would have less or more time to add air respectively?

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DaveB (original poster)

#83: Post by DaveB (original poster) »

Bluenoser wrote:If you weigh the milk before and after steaming.. along with the seconds it takes to steam (and the beginning and final temp).. you can calculate the 'dryness' of your steam and compare it to other methods.. Generally I get about 10% water added when steaming to 140F. So for 200g of milk, my Pro500 with 2L boiler and 1.3bar of steam pressure adds about 20g of water.. This is not bad..
Thought I'd give your test a go this morning with the BDB, so I steamed 150g of mIlk to my usual 135°-140° and ended up adding 15g - which coincides with your 10%. Not bad for a "disposable" machine, eh? :D
Napy123 wrote: I'm genuinely curious why the cooling of the steam wand would help in creating better steamed milk? I really don't know too much so just wondering why or how that would affect things.

I can imagine that a hot steam wand tip would lead to a faster steaming milk since the milk temp would increase faster? If so, then I can imagine the primary (or only?) difference between a hotter vs a colder steam wand tip means that you would have less or more time to add air respectively?
To be honest, it's been so long since I started the thread that I don't remember where that come from. Rereading the thread, it seems the water was used as a gauge to judge the dryness of the steam. Anyway, I think the best tip was to have the steam valve open while heating, which I confirmed in my subsequent posts.
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Bluenoser
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#84: Post by Bluenoser »

DaveB wrote:Thought I'd give your test a go this morning with the BDB, so I steamed 150g of mIlk to my usual 135°-140° and ended up adding 15g - which coincides with your 10%. Not bad for a "disposable" machine, eh? :D
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That disposable machine performs better than most $3k+ machines. The 'big iron' manufacturers don't seem to really focus on performance and, as such, you'll see no marketing info about such data. But the BDB, from what I read, is extremely temperature stable, while adding preinfusion and, with a simple mod, some pressure profiling, a fast warmup and the ability to pull shot after shot.

DaveB (original poster)

#85: Post by DaveB (original poster) »

Good timing on the thread getting bumped the other day. I haven't used the Bellman in quite a while, and skimmed over the entire thread again to refresh. Then this morning woke up to a power outage...

Filled the Bellman half way to the handle with water, leaving the steam valve open. Let it hiss for a minute or so, then closed the valve. Once the relief valve went off I turned off the burner. Purged for two or three seconds, and then began steaming. Here's the result (4oz milk for 8oz latte):

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