230V Normally Open Thermal Actuator | M30×1.5 Underfloor Heating
230V Normally Open Thermal Actuator | M30×1.5 Underfloor Heating
230V Normally Open Electric Thermal Actuator for Underfloor Heating Manifolds
The QXL N58A Electric Thermal Actuator is a precision-engineered electric drive component designed for branch valves, small valves, and dynamic balancing valves on underfloor heating manifold systems. Operating at 230VAC, this normally open (NO) thermostatic actuator delivers silent, reliable zone control with a simple M30×1.5 nut connection — making installation, adjustment, and removal fast and hassle-free.
Key Features
- Paraffin Propulsion Element — Driven by PTC heating for smooth, consistent valve actuation
- Normally Open (NO) Design — Valve remains open when de-energised; closes upon power-on for zone shutoff
- Spring Return Function — Automatically returns to the open position when power is cut
- Completely Silent Operation — No motor noise during open or close travel
- Travel Position Indicator — Visual confirmation of current valve position at a glance
- Quick Nut Connection (M30×1.5) — Fits most standard manifold valve bodies; tool-free removal
- PC Shell Construction — Durable polycarbonate housing rated for ambient temperatures from -5°C to 50°C
Technical Specifications
| Voltage | 230VAC 50/60Hz |
| Stable Power Consumption | 3W |
| Thrust | 110 N |
| Stroke | 3.5 mm |
| Full Travel Time | 180 s – 300 s |
| Connection Size | M30 × 1.5 |
| Ambient Temperature Range | -5°C to +50°C |
| Cable Length | 70 cm (approx. 27 in) |
| Shell Material | PC (Polycarbonate) |
What's in the Box
- 1 × N58A Electric Thermal Actuator (230V NO)
Made in Mainland China.
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Frequently Asked Questions
Q: What does "normally open" (NO) mean for this thermal actuator?
A: A normally open actuator means the valve is in the open (flow-passing) position when no power is supplied. When 230V power is applied, the PTC heating element expands the paraffin propulsion element, pushing the valve stem to close the valve. This is ideal for fail-safe heating applications where flow should continue if power is lost.
Q: Which valve bodies is this actuator compatible with?
A: The N58A actuator uses a standard M30×1.5 nut thread connection, which fits the vast majority of manifold branch valves, small zone valves, and dynamic balancing valves used in underfloor heating systems. Always verify your valve body thread size before purchasing.
Q: Is this actuator suitable for 120V systems?
A: No. This model is rated for 230VAC (50/60Hz) only. It is not compatible with 120V North American systems. Please ensure your heating control system and thermostat output match the 230V requirement before installation.
Q: How long does it take to fully open or close?
A: The full travel time (open to close or close to open) is between 180 seconds and 300 seconds (3 to 5 minutes), which is typical for thermal actuators and helps prevent water hammer in hydronic heating systems.