Honeywell VC Series balanced 2-position hydronic valves are used in domestic and small commercial heating and cooling applications to control hot and/or cold water flow. They consist of an actuator, valve, and a cartridge assembly 2-way valves are designed for on-off zone control of domestic systems. 3-way valves can be piped for either diverting or mixing valve applications in domestic central heating and/or cooling systems, Both versions can be used to control individual fan coils, radiator, space heaters or convector applications. Depending on the model selected they can be controlled by a low or line voltage SPST or SPDT controller such as a room thermostat, aquastat, or flow switch. VC Series hydronic valves are designed to take advantage of sinusoidal valve actuator travel, and therefore operate silently and reduce water hammer.