Honeywell MVN643L0000 Electric Valve Actuator Fast-Acting SPDT Floating Control

The Honeywell MVN643L0000 is a fast-acting electric rotary valve actuator designed for use with VBN2 two-way and VBN3 three-way control ball valves in commercial HVAC systems. This low-profile, fail-in-place actuator provides reliable floating control for hot and chilled water applications with glycol solutions up to 50%.

Key Features:

• Fast-acting SPDT (Single Pole Double Throw) floating control with 30-second run time
• 27 lb-in (3 Nm) torque rating for reliable valve operation
• Non-spring return, fail-in-place design maintains valve position on power loss
• 90-degree rotational stroke (±3 degrees) for quarter-turn ball valve control
• Tool-free click-on installation saves time and labor costs
• Low-profile design enables installation in tight spaces
• Can be mounted on valves in any of four positions for flexible installation
• 24 VAC/DC power supply compatibility
• NEMA 2 enclosure rating for indoor applications
• Compatible with control ball valves from 1/2" to 1-1/4"

This actuator features an innovative design that simplifies commissioning and service while reducing mechanical and electrical installation costs. The extendable position indicator allows for easy visual confirmation of valve position during setup and maintenance. MVN actuators can be ordered separately or as factory-assembled valve packages.