This Valve Actuator is an optional feature for mounting directly to the balancing manifold. The Valve Actuator provides on/off flow control to individual radiant circuits. This new style 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 with four wires to connect to the thermostat and circulating pump.
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.