The Schneider Electric (Erie) VM3213 is a 3-way, 4.0 Cv modulating control valve with a 1/2-inch sweat connection, designed for precise flow control in HVAC hydronic systems. It operates with a compatible actuator to proportionally mix or divert water flow based on control signals, ensuring accurate temperature regulation. https://www.partshnc.com/vm3213-schneider-electric-erie-12-sw-3w-40cv-modulating-vlv