What is a "dragon" hx?

#1: Post by **slipchuck** » August 28th, 2019, 1:04 pm

Thanks

Randy

#2: Post by **SJM** » August 28th, 2019, 1:45 pm

Check this out
Temperature surfing an HX espresso machine?

It will give you a thumbnail and then you can follow the link back for more information.

#3: Post by **slybarman** » August 28th, 2019, 2:06 pm

An HX machine whose grouphead (thermosyphon loop) tends to run hot and require more/longer flushing than others.

#4: Post by HB » August 28th, 2019, 2:11 pm

For easy reference, here's an excerpt from Ideal brew temperature management by HX espresso machine type in the FAQ:

Dragon - key characteristics are lots of flash boiling, fast recovery, nearly zero thermal memory, and slowly rising brew temperature profile. Simply stated, after the cooling flush, the heat exchanger output is the brew temperature. Examples include the Elektra Semiautomatica, Bezzera BZ07, and the Olympia Maximatic.