Description
The Caleffi 521419AC Thermostatic Mixing Valve is a flow control device that blends hot and cold water to maintain a stable outlet temperature, supporting consistent operation within HVAC systems. Built with a 1/2” sweat connection, it uses an internal thermostatic element that adjusts the mix by expanding or contracting in response to temperature changes. This action regulates the proportion of incoming water to keep the outlet within the desired range. Applied in hydronic heating or hot water circuits, it is soldered into the piping network during setup, allowing controlled temperature output and balanced water distribution.
