Great for multiple small radiant zones. The Valve Actuator provides on/off flow control to individual radiant circuits.
Incorporates an indicator window that allows you to visually determine whether the valve is fully open or closed. Flow
can be balanced prior to installing by turning the adjustment valve under the blue cap. Actuator is 24 VAC (2.5 W) with
four wires to connect to the thermostat and close an end switch.
This is a high quality zone valve actuator with a metal connecting knob and 4 wire control for end switch pump control.
Indicator window on front of actuator valve. Window shows red when valve is closed, black when valve is open.