While the "S" suffix is optimized for steam

This assembly is factory-configured as normally closed (Stem Up to Close or Stem Down to Close depending on the linkage) to ensure safety upon power loss

the logic circuit has likely failed

proper trimming and selection of the paddle length allow for precise sensitivity in lines with specific GPM requirements

This mixing valve is ideal for hydronic system balancing and constant pressure drop applications

Resideo V8043C1116 Zone Valve 322027-701 While the "S" suffix isThe Resideo V8043C1116 is a heavy duty, 2 way normally closed zone valve engineered for precision flow control in hydronic heating systems. Designed for 24 Vac operation, this motorized valve features a 3 8" flare connection and a robust 3. 5 Cv flow coefficient, making it ideal for managing individual baseboard or radiant loops. The unit utilizes a spring return to close mechanism, ensuring dependable shut off during power loss or system de