HVAC Hydronic Control Solution – Honeywell ML6420A3015 | ML6420 Series
Where This Product Is Used
The Honeywell ML6420A3015 is a spring-return linear valve actuator engineered for precision flow control in commercial and industrial HVAC systems. It is widely deployed in the following applications:
- Air Handling Units (AHU) – Modulating chilled water and hot water coil valves for precise supply air temperature control
- Fan Coil Units (FCU) – Two-pipe and four-pipe hydronic systems in hotels, hospitals, and office buildings
- District Cooling & Heating Plants – Primary/secondary loop control valves in energy plants
- Building Management Systems (BMS) – Integrated with DDC controllers (Honeywell EXCEL, Siemens DESIGO, Johnson Controls Metasys)
- Chiller & Boiler Bypass Valves – Differential pressure management in large-scale hydronic networks
- Clean Room & Pharmaceutical HVAC – Where stable temperature and humidity control is critical
Technical Specifications
| Parameter | Value |
|---|---|
| Model Number | ML6420A3015 |
| Brand | Honeywell |
| Series | ML6420 |
| Supply Voltage | 230 VAC, 50/60 Hz |
| Control Signal | 0–10 VDC / 2–10 VDC (modulating) |
| Valve Compatibility | Up to DN80 (80 mm nominal bore) |
| Actuator Type | Spring-Return Linear |
| Stroke | 20 mm |
| Force Output | 800 N |
| Running Time | ~150 s (full stroke) |
| Fail-Safe Action | Spring return to closed (on power loss) |
| Enclosure Rating | IP54 |
| Ambient Temperature | 0°C to +50°C (operating) |
| Weight | 580 g |
| Electrical Connection | Cable with plug connector |
| Mounting | Direct mount to Honeywell V5011/V5013 valve bodies |
Why Engineers Specify This Model
- Spring-Return Fail-Safe – Automatically closes the valve on power failure, protecting hydronic systems from thermal runaway or flooding
- 230 VAC Native Power – No step-down transformer required in European and Asian electrical infrastructure; reduces panel cost and wiring complexity
- Wide Valve Compatibility (up to DN80) – Covers the majority of secondary loop and terminal unit valve sizes in a single actuator SKU
- Modulating Control (0–10 V / 2–10 V) – Enables proportional flow control for energy-efficient variable flow systems
- IP54 Enclosure – Suitable for mechanical plant rooms with condensation and dust exposure
- Honeywell Ecosystem Integration – Plug-and-play with Honeywell V5011N, V5013N valve bodies; no field calibration required
Complete System Bill of Materials
For a complete modulating hydronic control assembly, engineers typically specify:
- Honeywell ML6420A3015 – Linear actuator (this unit)
- Honeywell V5011N / V5013N – 2-way or 3-way globe valve body (DN15–DN80)
- Honeywell T7350 / Excel 10 – DDC room controller or BMS controller
- Honeywell AV9000 – Valve adapter kit (if required for specific valve body)
- 24 VAC / 230 VAC control panel with fused circuit
- Shielded 2-core signal cable (0–10 VDC loop)
Compliance & Industry Standards
- CE Marked – Compliant with EU Low Voltage Directive (LVD) and EMC Directive
- RoHS Compliant – Restriction of Hazardous Substances
- EN 60730 – Automatic electrical controls for household and similar use
- ASHRAE 90.1 Compatible – Supports variable flow strategies for energy code compliance
- ISO 9001 Manufactured – Honeywell Building Technologies quality management system
Quality Assurance & Sourcing
All Honeywell products supplied by Konmask.com are sourced through verified distribution channels. Each unit is:
- Inspected against Honeywell factory specifications before dispatch
- Supplied with original manufacturer packaging and documentation
- Traceable via Honeywell batch/lot codes
- Backed by Konmask’s 12-month supply warranty
We do not supply grey-market, refurbished, or counterfeit components. Authenticity certificates available on request.
How to Source This Part
To place an order or request a quotation for the Honeywell ML6420A3015:
- Online: Add to cart directly on this page
- Email RFQ: support@konmask.com – include quantity, delivery address, and required lead time
- Phone/WhatsApp: +0086 19859288691
- Bulk Orders: Volume pricing available for orders of 10+ units – contact us for a project quotation
Application-Specific FAQ
Q: Can the ML6420A3015 be used with non-Honeywell valve bodies?
A: The actuator is optimized for Honeywell V5011/V5013 valve bodies. Adaptation to third-party valves (e.g., Siemens, Belimo) may require a custom coupling bracket. Contact our technical team for compatibility assessment.
Q: What happens if the control signal is lost?
A: The spring-return mechanism drives the actuator to the fail-safe closed position within approximately 20 seconds, independent of power or signal status.
Q: Is the ML6420A3015 suitable for steam applications?
A: No. This actuator is rated for hydronic (hot water/chilled water) service only. For steam valve control, specify the Honeywell ML7420 series.
Q: Can I use a 24 VAC version instead?
A: Yes. The equivalent 24 VAC model is the Honeywell ML6420A3007. Confirm your panel voltage before ordering.
Q: What is the typical lead time?
A: In-stock units ship within 1–3 business days. For large project quantities, lead time is 5–15 business days depending on regional stock.
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Contact: support@konmask.com | +0086 19859288691
