A Dual boiler espresso machine has two boilers, whereas a heat exchanger machine only has one. Although this is the most obvious difference between the two types of machines, both can produce extremely high steam temperatures and temperature below boiling for quality espresso. SA179tubes.com Is The Leading Manufacturer Of A192 tube & SA 192 tubes.
HEAT EXCHANGER In a heat exchanger espresso machine like the Rocket Appartamento, water is kept at a temperature high enough to produce steam, approximately 255 - 265 degrees Fahrenheit. Water from the reservoir is fed into the steam boiler where it is flash heated before being channelled into the group to make the coffee. The steam boiler is half filled with water and has a heat exchange tube inside. The steam valve above the water and heat exchanger tube is where steam is drawn from to create steam and make your milk-based drinks. Heat exchanger boilers in espresso machines differ from standard boilers in how they heat and control the water.
Dual Boilers Dual boiler machines are just what they sound like: they have multiple boilers. Instead of a single boiler with multiple water paths, dual boilers have separate brew and steam boilers. The boiler can be ready at all times for either task. The end result is that temperature is no longer a factor in shot inconsistency. In a machine like this, it's nearly impossible for a barista's shot preparation to outrun brew boiler recovery. As with a heat exchanger, a dual boiler allows you to steam and brew at the same time. Both boilers are temperature stable within the required ranges for both brewing and steaming, providing excellent consistency in both processes.