Bluefin 3/4" NPT Zone Valve, Normally Closed 3.5 CV (24V)

3/4" NPT Zone Valve, Normally Closed 3.5 CV (24V) Note : Use this valve in closed loop hydronic systems that do not contain dissolved oxygen in system water, such as fresh water from frequent source of makeup water. The Bluefin Zone Valve is designed to control the on/off of the central air and heating system unit that is driven by a synchronous motor and an automatic spring return. The valve will remain in a closed position until the thermostat calls for the valve to open. Features Stainless Steel seat & Aluminum Alloy crust Actuator Brass Valve Body Synchronous Hysteresis Motor Normally Closed, 2-way Valve Stainless Steel Sprint Reset Synthetic Rubber Valve Core Two-Line control on/off No tools required for mounting valve