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Posted by jhernandez on March 08, 2005 at 11:34:19:
In Reply to: Re: boiler vacumm posted by DTMBoilerman on March 04, 2005 at 18:17:03:
to 1st responder,even though it is true to open the vent on a boiler to prevent a vacumm from forming as it is being taking off line (repairs,service,etc.)when the press. gauge reads aproximately 25#;message clearly reads LP(low press,wich implies a boiler with a MAWP of 15 psi.
to 2nd responder even though water does expand 1600X as is converted into steam,must keep in mind that condensate/return tank is open to atmosphere thus preventing a vacumm from being formed inside the tank.
check for proper operation of feedwater regulators,re-adjust diferential on press.troll to allow the boiler to run continiously as steam demand fluctuates,check logbook to see who's on shift,maybe a by-pass being left open to correct a low water condition? hope this helps!