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Re: Boiler Hot Standby

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Posted by Steamer on June 11, 2005 at 09:09:42:

In Reply to: Boiler Hot Standby posted by Ramendran on October 20, 2004 at 07:55:01:

Hi Ramendran

To maintain the boilers on stand-by without firing you should consider them as a steam accumulator, in fact they can also act as so with a proper arrangement.
There is no need for steam coils on the bottom as suggested, you can simply install a steam injector(s) under the furnace and a 2" float steam trap at the high water level.
This installation needs to have approvalls from the goverment inspection office.

Then simply inject steam from the main, close steam outlet valve and burner butterfly to prevent the draught of air.

The steam used to raise pressure and temperature in the boiler will condense and the excess will be removed by the float trap.

All the requirements regarding safety must be fulfill as this can be considered a major intervention on a boiler.
Finnaly you will have a stand-by boiler at pressure and temperature ready to start without firing it.

You can learn more about steam injectors on www.spiraxsarco.com

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