KMC Controls VEZ-4403AMBN Valve

The KMC Controls VEZ-4403AMBN is a heavy-duty 3/4" 3-way globe zone control valve engineered for professional HVAC applications including VAV reheat coils, fan coil units, and induction systems. This diverting zone valve features a robust forged brass body and an NPT threaded connection for a reliable, leak-free seal in hydronic heating and cooling loops. Operating on 24 VAC, the integrated 2-position actuator utilizes a spring-return mechanism with an AB-B fail-safe mode, ensuring the system defaults to a safe state during power loss. With a 4.1 Cv flow capacity and a maximum inlet pressure of 125 PSI, this assembly handles high-demand commercial environments with ease. The compact footprint and tool-free actuator replacement simplify installation and maintenance in tight plenum spaces, while the manual override offers critical field control. For contractors seeking a 3/4 inch zone valve with precise flow regulation, the VEZ-4403AMBN provides the necessary durability and high close-off pressure ratings required for modern hydronic balancing.

Key Benefits for Contractors

• High-Performance Flow Control: Features a 4.1 Cv rating for efficient management of hot and chilled water flow in terminal unit applications.
• Plenum-Rated Reliability: The UL-listed actuator is designed for overhead and plenum installations, meeting strict building safety codes.
• Quick Field Service: Snap-on actuator design allows for rapid replacement without the need for specialized tools or system drainage.
• Mechanical Fail-Safe: Reliable spring-return action ensures the valve returns to the AB-B position automatically upon signal interruption.
• Versatile Media Compatibility: Rated for fluid temperatures from 41?? to 122??F, making it suitable for a wide range of hydronic loop configurations.

Common Questions

Is the KMC VEZ-4403AMBN suitable for mixing or diverting applications?
This specific 3-way globe valve is primarily designed as a diverting zone valve to direct flow between different piping branches in a hydronic system.

Can the actuator be replaced without removing the valve body from the line?
Yes, the 2-position spring-return actuator is designed for tool-free installation and removal, allowing for fast maintenance while the valve body remains inline.

What is the maximum close-off pressure for this 3/4" valve?
The KMC VEZ-4403AMBN is rated for a maximum close-off pressure of 44 PSI, ensuring tight shut-off and preventing bleed-through in most zone control applications.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.