PRODUCT DATA
® U.S. Registered Trademark
Copyright © 1999 Honeywell Inc. • All Rights Reserved
ML7421A,B
Electric Linear Valve Actuator
GENERAL
The ML7421A,B Electric Linear Valve Actuators for
modulating controlare equipped with a stepper motor for
exact positioning. The direction of movement is reversible by
means of an internal selector plug. These actuators operate
standard Honeywell valves in heating, ventilating, and air
conditioning (HVAC) applications.
63-2517-2
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.
Contents
General ............................................................................ 1
Features .......................................................................... 1
Specifications .................................................................. 2
Installation ....................................................................... 3
Operation ......................................................................... 5
Checkout ......................................................................... 6
Ordering Information ....................................................... 7
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