Belimo B209B Valve Always verify your specific boiler's

Always verify your specific boiler's serial number and parts list to ensure match with the 512-200-078 design

is the critical seal required for McDonnell & Miller 47 Series

22 specifications for HVACR piping

Key Benefits ASME Rated Performance: Certified to ASME Section IV standards for safety and reliability in hydronic and steam systems

Its robust construction minimizes core saturation and heat dissipation issues

Belimo B209B Valve Always verify your specific boiler'sThe Belimo B209B is a high performance 1 2" 2 way characterized control valve designed specifically for demanding HVACR applications. Engineered with a nickel plated forged brass body and a chrome plated brass ball, this valve provides exceptional durability and chemical resistance in hydronic systems. Its integrated Tefzel characterized disc ensures a true equal percentage flow characteristic, allowing for stable control and preventing the "hunting"