Thermal Actuator 920066PL
The 920066PL Thermal Actuator is an electrothermal valve actuator designed for underfloor heating manifolds and hydronic zone control, available in both Normally Closed and Normally Open configurations. Manufactured by Legom with a durable glass-fiber reinforced PA66+30%GF housing, it converts a low-voltage control signal from a room thermostat into smooth, silent valve actuation, delivering an operating force of 100±10N and a stroke of ≥4mm while drawing only 2W of power.
Offered across a wide range of voltage versions and built to the EN 60730 standard for automatic electrical controls, the 920066PL fits standard manifold valves through M30x1.5mm or M28x1.5mm adapters and carries an IP54 protection rating for dust and splash resistance. With an opening and closing time of 3 to 5 minutes, it provides the gradual, wear-free control that thermal actuators are valued for across residential and commercial heating systems.
Key Benefits
- Normally Closed and Normally Open options – Both control directions are available, so the actuator suits either fail-safe-closed or fail-safe-open zone logic
- Wide voltage range – Available in 230V, 220V, 210V, 24V, and 12V to match mains-powered and low-voltage control systems from a single product family
- Dual adapter options – Supplied with M30x1.5mm or M28x1.5mm threads to fit a broad range of manifold and zone valve bodies without custom hardware
- Low 2W power consumption – Minimal holding load keeps energy use down across multi-zone manifolds running many actuators in parallel
- Silent, wear-free actuation – The thermal operating principle uses no motor or solenoid, giving quiet operation and long service life with no mechanical switching wear
- IP54 protection grade – Dust and splash protection makes the unit suitable for the typical manifold cabinet and utility-room environment
- EN 60730 compliant – Meets the international standard for automatic electrical controls for household and similar use
- PA66+30%GF housing – Glass-fiber reinforced nylon resists heat and mechanical stress for reliable performance in warm manifold environments
- OEM and ODM customization available – Voltage, control direction, adapter thread, cable length, and housing can be adapted to specific product and market requirements
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 920066PL |
| Voltage | 230V / 220V / 210V / 24V / 12V (version dependent) |
| Control Direction | Normally Closed / Normally Open |
| Power Consumption | 2W |
| Working Temperature | -5°C to 60°C |
| Force | 100±10N |
| Stroke | ≥4mm |
| Protection Grade | IP54 |
| Standard | EN 60730 |
| Adapter | M30x1.5mm / M28x1.5mm |
| Closing and Opening Time | 3 to 5 minutes |
| Housing Material | PA66+30%GF |
Specifications are typical values for the standard configuration. Voltage and control direction depend on the ordered version. Refer to the user manual for complete wiring details and dimensional drawings.
Application & Use Cases
- Underfloor heating manifolds – The primary application, where one actuator per loop opens and closes the manifold valve in response to each zone thermostat, enabling room-by-room temperature control
- Zone valve control – Drives manifold-mounted and two-port zone valves in multi-zone hydronic systems, switching flow to individual circuits on demand
- Radiator and HVAC valves – Actuates control valves in heating and cooling distribution assemblies that use an M30x1.5 or M28x1.5 valve interface
- Fan coil units – Controls water flow to fan coils in commercial HVAC installations for on/off zone regulation
- Thermostat-driven systems – Wired to room thermostats or heating controllers, translating the call-for-heat signal into valve movement with no external motor or linkage
Installation Notes
- Mount the actuator on a compatible valve using the correct M30x1.5mm or M28x1.5mm adapter. Confirm the valve thread before installation
- Match the voltage version to the control system supply. Applying the wrong voltage can damage the actuator
- Select the correct control direction (Normally Closed or Normally Open) for the intended fail-safe behavior of the zone
- Allow for the 3 to 5 minute opening and closing time. Thermal actuators are slow-acting by design and do not respond instantly like solenoid valves
- Observe the IP54 rating. The actuator is protected against dust and splashing water but must not be submerged or installed in fully exposed outdoor locations
- Wire the unit in accordance with EN 60730 and local electrical regulations, and keep it within the -5°C to 60°C ambient working range
- Install the actuator in the recommended upright orientation on the valve to ensure reliable operation and correct ingress protection
- For OEM integration, confirm three key parameters in writing before finalizing the order: voltage, control direction, and adapter thread
Frequently Asked Questions
What is the difference between the Normally Closed and Normally Open versions?
A Normally Closed (NC) actuator keeps the valve closed when it is not powered and opens when energized, which is the most common choice for underfloor heating because flow stops if power is lost. A Normally Open (NO) actuator keeps the valve open when de-energized and closes when powered. Choose the version that matches the fail-safe behavior your control system requires. The 920066PL is available in both configurations.
Why does the actuator take 3 to 5 minutes to open or close?
Thermal actuators operate by heating an internal expansion element rather than using a motor or solenoid, so movement is gradual by design. This slow, silent, wear-free actuation is ideal for underfloor heating, where rapid switching is unnecessary and smooth flow control improves comfort and valve life.
Which valves is the 920066PL compatible with?
The actuator connects through M30x1.5mm or M28x1.5mm adapters, which fit the majority of underfloor heating manifold valves and common zone valve bodies. Confirm the thread size of your valve before ordering to ensure the correct adapter version.
Which voltage version should I order?
The 920066PL is available in 230V, 220V, 210V, 24V, and 12V. Select the version that matches the output of your thermostat, wiring center, or heating controller. If you are integrating the actuator into a larger system, our team can advise on the correct voltage for your setup.
Where can the 920066PL be installed given its IP54 rating?
The IP54 rating means the actuator is protected against dust and against splashing water from any direction. It is suitable for typical indoor manifold cabinets and utility spaces, but it should not be submerged, exposed to pressure jets, or installed in fully exposed outdoor conditions.
Can the 920066PL be customized for OEM projects?
Yes. Legom offers full OEM and ODM services. Voltage, control direction, adapter thread, cable length, and housing details can be adapted to your product requirements. Written confirmation of three key parameters is required before a customization project begins: voltage, control direction, and adapter thread. Contact us via WhatsApp or email to start the process.
OEM & ODM Customization
Legom supports full OEM and ODM services for the 920066PL Thermal Actuator. Our engineering team can customize the voltage version, control direction, adapter thread, cable length, and housing to match your product requirements. Before any commitment, written confirmation of three key parameters is required: voltage, control direction, and adapter thread. All customization projects are handled with strict confidentiality. Contact us via WhatsApp or info@legomsmart.com.
User Manual
Product information last reviewed by the Legom Technical Team. For the most current specifications, refer to the official user manual 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.
