Posted by Vern on January 05, 2002 at 08:55:56:
In Reply to: Miura Boilers: Pros and Cons posted by Jack Halston on January 04, 2002 at 20:10:23:
: Need to know from other engineers the pros and cons of Miura hot water and steam boilers. Who has had success with them and who has not?
: Jack
I am currently supplying water treatment chemicals for a 200 HP Miura
boiler. This is my first and so far only experience with one. It has been
online for about 3 weeks. The Miura looks to me to be a very efficient
unit, but because of this high efficiency and the design of the boiler
proper care of this unit becomes much more essential than with a scotch
style boiler. These boilers hold only a small volume of water during operation
The 200 I deal with only holds 65 gallons during operation, where a scotch
would probably hold around 1000-2000 gallons. The Miura has a heating surface
per boiler hp of about 1-2 square feet where the scotch is about 5 square feet
per hp. It becomes much more essential to maintain good clean water with this unit,
no hardwater at all can be allowed to come into the unit. Miura sells a hardness
testing device to monitor the incoming water, and it can be wired into the
boiler limit circuits to shut down the boiler if any hardness becomes present.
The boiler has thermocouples welded to the tubes to monitor overheating.
If the boiler scales, it shuts down on overtemperature and has to be descaled.
Contact me via email for more info. Vern