930019NT Fan-coil Components
The Legom 930019NT is a fan coil valve component engineered for hydronic HVAC systems, providing precise flow control at fan coil unit connections in heating and cooling applications. With a flow coefficient of KVS 2.7 m³/h and a maximum working pressure of 25 bar, the 930019NT is sized for standard fan coil unit flow requirements across residential and commercial installations, including high-rise buildings where static column pressure at lower floors is a design consideration.
A key advantage over standard water-only fan coil valves is direct compatibility with ethylene glycol solutions up to 50% concentration, eliminating the need for a buffer heat exchanger between a glycol freeze-protection circuit and the valve. Combined with an operating temperature range of -10°C to 120°C, this makes the 930019NT suited to cold-climate systems, heat pump installations with outdoor pipework, and any hydronic circuit where glycol is the primary heat transfer fluid.
Key Benefits
- Ethylene glycol compatible up to 50% – Works directly in glycol-water circuits at concentrations up to 50%, covering freeze protection down to approximately -37°C without requiring a secondary heat exchanger to isolate the valve from the glycol loop
- KVS 2.7 m³/h – Sized for standard fan coil unit flow demands, providing appropriate control authority across the operating pressure range in typical FCU installations
- 25 bar maximum working pressure – Higher pressure rating than many standard fan coil valves, supporting use in tall buildings where static water column pressure at lower floors is substantial
- Wide operating temperature range of -10°C to 120°C – Covers chilled water cooling (6–12°C), low-temperature heating (35–45°C), high-temperature heating (60–80°C), and below-zero glycol circuit temperatures in a single component specification
- M30 actuator connection compatible – Designed to accept standard M30×1.5 thermal actuators for integration with room thermostat zone control systems
- OEM and ODM customization available – Flow coefficient, pressure rating, connection size, and media compatibility can be customized for specific project requirements
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 930019NT |
| Applicable Media | Water, ethylene glycol solution |
| Glycol Max. Concentration | 50% |
| KVS | 2.7 m³/h |
| Maximum Working Pressure | 25 bar |
| Operating Temperature Range | -10°C to 120°C |
| Ambient Temperature Range | 0°C to 50°C |
For complete specifications including connection size, body material, dimensional drawings, and compatible actuator options, contact the Legom team directly.
Application & Use Cases
- Fan coil unit flow control in commercial HVAC – Installed at the fan coil unit connection point in offices, hotels, hospitals, and commercial buildings to regulate hot or chilled water flow for room-by-room temperature control
- Glycol-based HVAC systems – Applied in systems using ethylene glycol solution as the primary heat transfer fluid, including heat pump installations with outdoor pipework, solar thermal systems, and cold-climate district heating connections where freeze protection is required
- High-rise building HVAC installations – The 25 bar maximum working pressure accommodates high static pressures present at lower floors of tall buildings, where many standard fan coil valves with lower pressure ratings are not suitable
- Four-pipe fan coil systems – Applied on both heating and chilled water circuits in four-pipe FCU installations, covering the full -10°C to 120°C temperature range of both circuits in a single component specification
- Zone control systems with thermal actuators – Combined with M30-compatible thermal actuators and a room thermostat or base station, provides on/off or proportional zone control at each fan coil unit in a multi-zone HVAC installation
Installation Notes
- Ensure system fluid is confirmed as water or ethylene glycol solution at a maximum concentration of 50% before installation. Do not use with other glycol types or concentrations exceeding 50%
- Verify that system working pressure does not exceed 25 bar at the valve installation point under all operating and static conditions
- Install the valve within the ambient temperature range of 0°C to 50°C. The fluid operating range of -10°C to 120°C refers to the medium temperature, not the installation environment
- When connecting a thermal actuator, use a compatible M30×1.5 thread actuator. Ensure the actuator control direction (NC or NO) matches the system design before commissioning
- Flush the system pipework before installing the valve component to remove grit and debris that could damage the valve seat
- For full installation guidance including torque values, dimensional clearances, and compatible accessories, contact the Legom technical team
Frequently Asked Questions
Why is glycol compatibility important for a fan coil valve?
Many standard HVAC valves are rated for water only. In systems where ethylene glycol is used as a freeze-protection additive — common in heat pump systems with outdoor pipework, solar thermal installations, and cold-climate HVAC — a water-only valve cannot be used directly in the glycol circuit without an intermediate heat exchanger. The 930019NT’s 50% glycol compatibility eliminates this constraint, simplifying system design and reducing installed cost in glycol-based hydronic systems.
What actuator is compatible with the 930019NT?
The 930019NT accepts standard M30×1.5 thread thermal actuators. Legom’s own thermal actuator range, including the 920039PL, is compatible with this connection. Confirm NC or NO control direction with the actuator specification before ordering, as this must match the system’s zone control design. Contact the Legom team for confirmed actuator compatibility for your specific application.
What is KVS and how does 2.7 m³/h compare to other fan coil valves?
KVS is the flow coefficient expressing the volume of water (in m³/h) that passes through the fully open valve at a differential pressure of 1 bar. A KVS of 2.7 m³/h is typical for DN15 or DN20 fan coil valves sized for small to medium FCUs with design flow rates in the range of 0.3 to 1.5 m³/h at typical fan coil differential pressures of 0.1 to 0.5 bar. For larger FCUs requiring higher flow rates, a valve with a higher KVS value would be required. Contact Legom to confirm that 2.7 m³/h is appropriate for your specific fan coil unit’s flow requirements.
Can the 930019NT be used in both heating and cooling circuits?
Yes. The -10°C to 120°C operating temperature range covers both chilled water cooling circuits and hot water heating circuits. In four-pipe FCU systems where separate heating and chilled water circuits serve each unit, the 930019NT can be specified for both supply connections.
OEM & ODM Customization
Legom supports OEM and ODM services for the 930019NT Fan Coil Components. Our engineering team can customize flow coefficient, pressure rating, connection size, and media compatibility specifications. All customization projects are handled with strict confidentiality. Contact us via WhatsApp or info@legomsmart.com.
Product information last reviewed by the Legom Technical Team. For the most current specifications, refer to the official datasheet or contact our sales team.
Custom OEM & ODM Solutions
Legom is a direct manufacturer offering end-to-end OEM and ODM services. With our in-house engineering and production capabilities, we work closely with distributors and system integrators to deliver fully customized solutions under strict NDA.
