Low-water cutoff
What it is
The NBP should also include a Hartford Loop, which consists of an equalizing pipe connecting the steam header to the condensate inlet at the bottom of the boiler. It acts as a backup safety measure to the low-water cutoff by allowing steam pressure to build in the boiler without forcing water into the return line and protecting the boiler against low water in the event of a return line leak (Ahlgren 1994).
Its parts
Related pages
- Glossary: Low-water cutoff
Its entry, and the guide's pages that use it.
- Steam heat
How steam boilers and radiators work, air vents, banging and boiler rules
Sources
- U.S. Department of Energy. Measure Guideline: Steam System Balancing and Tuning for Multifamily Residential Buildings.