Re: Smoke Door on Boiler
Author: Hot Water
Date: 07-30-2021 - 14:27
? Wrote:
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> On the SP 4449 or UP 4014. The smoke door on the
> Boiler. How is it sealed so the pressured is not
> lost around the door?
First, there is no "pressure" in the smoke box of ANY steam locomotive. That is where the vacuum is created by the exhaust nozzle, in order to draw combustion air into the firebox.
The door/doors are sealed with a 2" wide fiberglass "rope" casketing material so that no outside air enters the smokebox, which would seriously effect the required vacuum.