On-off, normally open or normally closed control in open and closed hydronic systems.  Simple to install and operate, the valve can be installed in any direction, in any orientation.  Snap-in quick connects make for a simple and secure wiring hook-up.  LED shows full functionality of the valve's operation and thermostat status.  Uses half the power of the 560 Series Zone Valves.  2-way or 3-way zone valves available.