KMC Controls VEZ-4103AMBM Valve

For HVAC contractors managing terminal unit performance, the KMC Controls VEZ-4103AMBM stands as a reliable solution for precision flow management in VAV systems and fan coil units. This 3/4 inch 2-way globe valve is engineered for hot or chilled water applications, featuring a normally open (NO) configuration that defaults to a fail-safe open position. The 24V spring return actuator ensures positive close-off and rapid response during power loss, maintaining system safety and thermal stability. With a 4.1 Cv rating, this assembly provides the necessary flow capacity for efficient heat transfer across common reheat coils and induction units. The compact design facilitates installation in tight mechanical enclosures, while the brass body and stainless steel trim offer a pressure rating up to 300 PSI, making it a rugged choice for high-pressure commercial hydronic loops. The integrated actuator includes a visual position indicator and manual override, allowing for streamlined commissioning and field troubleshooting without specialized tools.

Key Benefits

• Fail-Safe Operation: The spring return mechanism ensures the valve returns to its normally open state during power interruptions, preventing coil freeze-up or overheating.
• Contractor-Friendly Design: Compact footprint and FNPT connection sizes allow for easier integration into congested VAV boxes and small fan coil cabinets.
• High-Pressure Durability: Engineered with a robust brass body and a 300 PSI static pressure rating to withstand demanding commercial HVAC environments.
• Tool-Free Maintenance: Actuators can be field-installed or replaced on the valve body without the need for additional tools, reducing labor time during service calls.
• Flexible Performance: Rated for a wide temperature range, making it suitable for both chilled water and hot water zone control valve applications.

Common Questions

What is the fail position of this valve assembly?
The VEZ-4103AMBM is a normally open valve with a spring return fail-safe. This means that if 24V power is removed or lost, the internal spring will force the valve to the fully open position.

Can the actuator be manually positioned for system testing?
Yes, the actuator features a manual override and a visual position indicator, allowing technicians to manually adjust the valve during commissioning or when the system is unpowered.

Is this valve suitable for steam applications?
This specific model is designed for hot and chilled water, air, and light oils. For high-pressure steam service, verify that the media temperature and pressure do not exceed the NPT globe valve specifications defined by KMC Controls.

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.