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Vacuum breakers standard on fired boilers (eg those no vacuum rated)

Vacuum breakers standard on fired boilers (eg those no vacuum rated)

Vacuum breakers standard on fired boilers (eg those no vacuum rated)

(OP)
dear all,

I am trying to get an undestanding of engineering approaches here.  We have  a boiler which is not vacuum rated but currently does not have a vacuum breaker.  The procedure is to open a vent when the pressure drops near atm pressure.  This boiler is cycled up and down every week while a waste heat boiler is turned up/down.

Should we invest in a vacuum breaker ?
or are those a bad device the spirax sarco web site seems to suggest they are common.. (on boilers that are not vacuum rated..)

is this true

 

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