San Francisco : Architect and Engineer, Inc · leaf 472
POORICHHKD PHOTO ENGRMYING CO, 52^324 <toMMERCJAi-STR££T;;. SANfRANCf&CO. H McDonnell low watercut-off for boilers New low water fuel cut-off for automat-ically fired boilers carrying up to 50 Lbs.pressure has been announced by McDON-NELL & MILLER, Inc., Wrigley Bldg.(Chicago, III. … Designed primarily for hot water heatingboilers it can be used on steam boilers. Will stop burner in event of low waterthus preventing leaks in system, inoperativeprimary controls, or the prolonged openingof a relief valve in an emergency. Installswith 1 equalizing piping; combines prin-ciples of…
Architecture · Building
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