Why choose Honeywell valve actuators for AHU/FCU systems?
Posted on: 30/10/2025
In HVAC systems, especially AHUs (Air Handling Units) and FCUs (Fan Coil Units), the ability to accurately control the flow of chilled or hot water plays a crucial role in maintaining temperature, humidity, and energy efficiency
To ensure this, selecting high-quality valve actuators is a decisive factor. Honeywell – a U.S. brand with over 100 years of experience in building automation – is always the top choice for engineers and investors
1. Honeywell Valve Actuators – Optimal Solution for AHU and FCU
Honeywell valve actuators are specially designed for HVAC systems, capable of linear or rotary valve control according to automatic control signals.
The two most popular models today are Honeywell ML7420A and Honeywell ML6161B.
ML7420A: Linear actuator, suitable for 2-way or 3-way valves, commonly used in AHUs where precise chilled water flow control is required.
ML6161B: Rotary actuator, compact design for FCUs, easy to install and maintain, stable operation in high-humidity environments.
Both models are compatible with Honeywell valves V5011, V5013, V5045, V5050, and standard control signals 0–10VDC or 2–10VDC in BMS systems.
2. Key Advantages of Honeywell ML7420A and ML6161B
High accuracy, fast response
Integrated feedback sensors allow precise valve positioning, minimizing errors during temperature control.
Durable design, IP54 rated
Dust- and moisture-resistant structure, suitable for mechanical environments or wet technical ceilings where FCUs are often installed.
Easy BMS integration
Both models support linear or ON/OFF control, compatible with most central HVAC-BMS controllers for synchronized and stable operation.
Quiet operation, energy-saving
Low-noise, low-vibration operation with reduced energy consumption compared to traditional models – ideal for high-end projects requiring quiet operation.
Simple maintenance, long lifespan
Honeywell’s Quick Mount design allows engineers to replace or adjust the actuator without removing the valve from the piping system.
3. Applications in AHU and FCU Systems
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AHU (Air Handling Unit): ML7420A is often used to control chilled water valves, maintaining stable supply air temperature.
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FCU (Fan Coil Unit): ML6161B controls 2-way/3-way valves, adjusting chilled/hot water flow to coils, saving energy and balancing temperature across zones.
The combination of these actuators ensures smooth, precise, and cost-effective operation of the entire HVAC system.
4. DLK Vietnam – Official Honeywell Distributor
DLK Vietnam is the official distributor of Honeywell products, including valve actuators, HVAC sensors, and automation controllers.
With a team of highly skilled engineers and extensive experience in BMS-HVAC projects, DLK provides:
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100% genuine products with full warranty.
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Technical consultation and model selection tailored to each project.
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On-site installation, adjustment, and maintenance support.
DLK has been a trusted solution provider for many buildings, factories, hospitals, and shopping centers nationwide.
5. Conclusion
Choosing the right Honeywell valve actuator not only ensures stable AHU/FCU operation but also improves system efficiency, reduces energy consumption, and optimizes operating costs.
With flagship models like ML7420A and ML6161B, along with technical support from DLK Vietnam, you can be confident in the long-term quality and performance of your HVAC system.
Contact DLK Vietnam for detailed consultation and quotations on genuine Honeywell valve actuators.