Wax Thermostatic Element LG044X
The LG044X Wax Thermostatic Element is a standard-force thermostatic actuator with a distinctive uniform stroke profile, delivering equal piston travel of 1 ± 0.15mm across each consecutive temperature band between 30°C and 50°C. Built with Legom’s proprietary patented wax formula, it delivers consistent, repeatable stroke actuation across a rated lifespan of 100,000 cycles. It has passed European product certification by accredited institutions including ACS and WRAS.
Unlike elements that deliver varying stroke across different temperature bands, the LG044X maintains the same 1mm stroke increment across three consecutive bands — 30°C~40°C, 40°C~45°C, and 45°C~50°C — producing a linear, proportional actuation characteristic across the full 30°C to 50°C primary range. Total stroke across the full 30°C to 90°C span is capped at ≤4.5mm. Constructed from copper with a maximum load of 140N and a spring rate of 5N/mm.
Key Benefits
- Uniform stroke profile across three consecutive bands – Delivers identical stroke of 1 ± 0.15mm in each of the three primary temperature bands (30°C~40°C, 40°C~45°C, 45°C~50°C), producing a linear actuation characteristic that simplifies valve mechanism design
- Predictable, proportional actuation – The equal-increment stroke profile makes valve opening directly proportional to temperature rise across the 30°C to 50°C range, without the acceleration or deceleration zones present in other multi-stage models
- 30°C activation start – Begins responding above ambient temperature, making it suitable for applications where thermostatic control must begin as water temperature rises from room temperature toward body-comfort and anti-scald thresholds
- Standard 140N load platform – Compatible with the full range of valve assemblies designed for standard Legom wax elements
- Patented wax formula – Proprietary Legom formulation delivers superior sensitivity and temperature-response accuracy versus standard wax elements
- ACS and WRAS certified – Passed European experimental institution product certification, confirming suitability for potable water and HVAC applications in international markets
- Rated for 100,000 cycles – Exceptional service life verified through rigorous lifecycle testing, ensuring reliable long-term performance in high-use installations
- Copper construction – Corrosion-resistant material ensures long-term durability in wet and thermally cycled environments
- OEM and ODM customization available – Temperature range, working stroke, and maximum load can be customized to suit specific product requirements
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | LG044X |
| Material | Copper |
| Maximum Load | 140N |
| Minimum Load | 45N |
| Testing Load | 55N |
| Spring Rate | 5N/mm |
| Maximum Temperature | 90°C |
| Stroke | L = 18.3 ± 0.3mm at 40°C, 55N |
| Lifespan | 100,000 cycles |
| Certification | ACS, WRAS |
Temperature vs. Stroke
| Temperature (°C) | Stroke (mm) |
|---|---|
| 30°C ~ 40°C | 1 ± 0.15 |
| 40°C ~ 45°C | 1 ± 0.15 |
| 45°C ~ 50°C | 1 ± 0.15 |
| 30°C ~ 90°C | ≤ 4.5 |
Stroke values measured during heating-up cycle. Cooling-down cycle may exhibit slight hysteresis typical of wax thermostatic elements. Refer to the Temperature VS. Stroke curve in the Datasheet for the full graphical representation.
Application & Use Cases
- Thermostatic mixing valves requiring linear response – The uniform 1mm stroke increment per band makes the LG044X suited for TMV assemblies where the valve mechanism is designed around a linear relationship between temperature rise and valve opening, simplifying flow characterization and commissioning
- Anti-scald and hot water safety devices – The 30°C to 50°C primary range covers the transition from ambient comfort temperature through the lower portion of the scalding risk zone, enabling consistent proportional response as water approaches unsafe temperatures
- HVAC and air conditioning systems – Used in thermostatic control valves where uniform actuation per degree of temperature change is preferred over progressive or stepped profiles
- Automotive engine cooling systems – Applied in engine thermostats and cooling circuit controls where a linear, proportional response in the 30°C to 50°C warm-up range supports smooth engine warm-up management
- Sanitary and medical equipment – Integrated into thermostatic valve assemblies where predictable, proportional water temperature control from ambient through body-temperature range is required
- Plumbing, shipping, military, and other industries – Suitable for any application requiring self-acting, linear thermostatic control with equal stroke increments across a defined temperature range
Installation Notes
- The LG044X must be installed in direct contact with the fluid whose temperature it is intended to sense, ensuring accurate uniform response across the full 30°C to 50°C primary active range
- Ensure the element is fully immersed in the flow path within the host valve or assembly. Partial immersion will disrupt the uniform stroke profile by causing uneven temperature sensing
- Do not expose the element to temperatures exceeding 90°C, as sustained exposure above the maximum rated temperature may permanently degrade the wax charge and reduce stroke accuracy
- Avoid applying forces exceeding the maximum load of 140N to the piston during assembly or operation
- The host valve or actuator assembly must provide adequate spring-back force to reset the piston on cooling, as the wax element generates push force only during heating
- Keep the element away from external heat sources not part of the intended sensing medium to avoid premature or uneven actuation across the uniform stroke bands
- For OEM integration, confirm three key parameters in writing before finalizing the order: temperature range, working stroke, and maximum load
Frequently Asked Questions
What makes the LG044X different from other Legom wax thermostatic elements?
The LG044X is the only model in the Legom wax element range with a uniform stroke profile — all three primary temperature bands deliver exactly the same stroke of 1 ± 0.15mm. Most other Legom models deliver varying stroke across different bands: progressively increasing, tapering, or including deceleration zones. The LG044X’s equal-increment profile produces a linear actuation characteristic that is uniquely well suited to valve mechanisms designed for proportional, predictable response across the 30°C to 50°C range.
How should I read the four-row stroke table?
The first three rows (30°C~40°C, 40°C~45°C, and 45°C~50°C) each specify 1 ± 0.15mm of stroke, confirming the uniform profile across three consecutive bands. Note that the first band spans 10°C while the second and third each span 5°C — the same stroke is delivered regardless of the band width, which is an important characteristic for valve designers to account for when sizing the mechanism. The fourth row (30°C~90°C, ≤4.5mm) gives the total stroke ceiling across the full operating span.
What certifications does the LG044X hold?
The LG044X has passed European experimental institution product certification under ACS and WRAS standards, confirming its suitability for use in drinking water systems and broader HVAC and plumbing applications in certified markets.
What is the expected service life of the LG044X?
The LG044X is rated for 100,000 actuation cycles, supporting long-term deployment in high-use installations across its full 30°C to 90°C operating range.
Can the LG044X be customized for different temperature or stroke requirements?
Yes. Legom offers full OEM and ODM customization. If your application requires a different activation temperature, working stroke, or load specification, the engineering team can develop a customized solution. Written confirmation of three key parameters is required before any customization project begins: temperature range, working stroke, and maximum load.
How do I select the right wax thermostatic element for my product?
The key selection criteria are the required activation temperature range, the working stroke needed to actuate your valve mechanism, and the maximum load the element must deliver. If your valve design requires a linear, proportional stroke response across a defined temperature range rather than a staged or accelerating profile, the LG044X is the appropriate starting point. Contact us via WhatsApp or email and our team will assist with the final selection.
OEM & ODM Customization
Legom supports full OEM and ODM services for the LG044X Wax Thermostatic Element. Our engineering team can customize the activation temperature range, working stroke, and maximum load to match your product requirements. Before any commitment, written confirmation of three key performance parameters is required: temperature range, working stroke, and maximum load. All customization projects are handled with strict confidentiality. Contact us via WhatsApp or info@legomsmart.com.
Datasheet
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.
