Original Honeywell ML7421B8012-E Electric Linear Valve Actuators With Best Price

FEATURES • Quick and easy installation. • No separate linkage required. • 3/4 in. (20 mm) stroke on ML7421A; 1-1/2 in. (38 mm) stroke on ML7421B. • No adjustments required. • Accurate valve positioning. • Selectable 0(2) to 10 Vdc/0(4) to 20 mA input signal. • Position feedback. • Force-limiting end switches. • Manual operator. • Direct or reverse acting. • Synchronous motor. • Corrosion resistant design. • Maintenance free. • Conduit connector knockout

pecified stem force is reached. Manual Operation The ML7421 is equipped with a manual operator knob (see Fig. 7) to open or close the valve in the event of power failure. Turn off or diconnect the power supply before manuallly operating the ML7421. To operate, push down the manual operator knob and turn the knob counterclockwise to move the stem downward or clockwise to move the stem upward. If the actuator is returned to automatic control, the manual operator knob unlocks automatically. NOTE: If the manual operator knob is not pushed in while turned, it turns only a short distance before it automatically disengages without power resumption. IMPORTANT: Manual operation allows a very high closing force that can jam the actuator spindle, exceeding the rating of the force switches, and stopping the motor. After a manual valve close-off operation, release the spindle one turn by turning the the manual operator knob so the manual operator automatically disengages on power resumption. Auxiliary switches The 43191680 Dual Auxiliary Switch can be used on both the ML7421A and ML7421B Electric Linear Valve Actuators. Switching points are adjustable over the full length of the actuator stroke; for example, the switch can be used to switch pumps or to provide remote indication of any stroke position. See the Installation Instructions packed with the auxiliary switch. IMPORTANT: Use the 43191680 Dual Auxiliary Switch only with 24 Vac applications. A