Description ML7421 Honeywell Actuator The ML7421A,B Non-Spring Return Electric Linear Valve Actuators are modulating control actuators used with controls that provide an analog output of 0 to 10 Vdc or 2 to 10 Vdc. These actuators operate standard Honeywell valves in HVAC applications. An internal selector plug can be used to reverse the direction of action. FEATURES • Quick and easy installation. • No separate linkage required. • 3/4 in. (20 mm) stroke on ML6421A and ML7421A. • 1-1/2 in. (38 mm) stroke on ML6421B and ML7421B. • No adjustments required. • Accurate valve positioning. • Low power consumption. • Selectable 0(2) to 10 Vdc or 0(4) to 20 mA input signal with ML7421. • Position feedback with ML7421. • High close-off ratings. • Direct/reverse acting with ML7421. • Force-limiting end switches. • Manual operator. • Synchronous motor. • Corrosion-resistant design. • Maintenance free. • Conduit connector knockout.
