Wax Thermostatic Element LG052X
The LG052X Wax Thermostatic Element is a high-temperature thermostatic actuator with a distinctive bell-curve stroke profile, engineered for applications requiring precise mechanical response in the 50°C to 70°C activation range. 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 most Legom wax elements that deliver increasing or tapering stroke as temperature rises, the LG052X follows a bell-curve pattern: stroke builds progressively from 0.3mm at 50°C~55°C through a peak of 1.55mm at 60°C~65°C before reducing back to 0.8mm at 65°C~70°C. The stroke reference point is at 55°C rather than the lower 25°C or 38°C used by most other models, confirming this element is designed specifically for high-temperature operating environments. Constructed from copper with a maximum load of 140N and a spring rate of 5N/mm.
Key Benefits
- Unique bell-curve stroke profile – Stroke increases from 0.3mm to a peak of 1.55mm between 60°C and 65°C before reducing to 0.8mm above 65°C, enabling valve behavior that responds most strongly at a defined mid-temperature peak rather than at the start or end of the range
- High-temperature activation from 50°C – Designed for environments where the thermostatic element must remain fully retracted below 50°C and begin responding only when fluid temperature enters the hot water delivery range
- 55°C stroke reference point – Unlike most Legom models referenced at 25°C or 38°C, the LG052X uses 55°C as the reference condition, confirming it is engineered for high-temperature operating contexts
- Four consecutive stroke bands – Separate stroke specifications for four consecutive 5°C bands between 50°C and 70°C provide precise actuation data across the entire active temperature window
- 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 | LG052X |
| Material | Copper |
| Maximum Load | 140N |
| Minimum Load | 45N |
| Testing Load | 55N |
| Spring Rate | 5N/mm |
| Maximum Temperature | 90°C |
| Stroke | L = 19 ± 0.3mm at 55°C, 55N |
| Lifespan | 100,000 cycles |
| Certification | ACS, WRAS |
Temperature vs. Stroke
| Temperature (°C) | Stroke (mm) |
|---|---|
| 50°C ~ 55°C | 0.3 ± 0.15 |
| 55°C ~ 60°C | 0.8 ± 0.15 |
| 60°C ~ 65°C | 1.55 ± 0.15 |
| 65°C ~ 70°C | 0.8 ± 0.15 |
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
- High-temperature thermostatic mixing and control valves – The 50°C to 70°C active range and bell-curve stroke profile make the LG052X suited for valve assemblies that must remain inactive at ambient and comfort temperatures, then respond with peak actuation at a defined high-temperature setpoint around 60°C~65°C
- Hot water safety and anti-scald devices – Applied in safety valves that must activate and modulate specifically within the scalding temperature zone, with the peak valve travel positioned at 60°C~65°C where intervention is most critical
- Industrial process temperature control – Used in thermostatic valve assemblies for industrial heating processes where control must occur within a specific high-temperature window and the element must remain retracted outside that window
- Automotive engine cooling systems – Applied in high-temperature engine thermostats requiring precise actuation within the engine’s normal operating temperature range of 60°C~70°C
- HVAC and air conditioning systems – Used in high-temperature circuit control assemblies where thermostatic response must be concentrated at elevated operating temperatures rather than across the full ambient-to-hot range
- Shipping, military, and other industries – Suitable for demanding environments requiring self-acting, high-temperature-specific thermostatic control with a bell-curve response characteristic
Installation Notes
- The LG052X must be installed in direct contact with the fluid whose temperature it is intended to sense, ensuring accurate thermostatic response across all four bands of the 50°C to 70°C active range
- Ensure the element is fully immersed in the flow path within the host valve or assembly to prevent slow or inaccurate actuation caused by partial exposure to the medium
- 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. At-rest position below 50°C must be maintained for the bell-curve profile to function as designed
- 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 LG052X unique compared to other Legom wax thermostatic elements?
The LG052X has two characteristics that set it apart from all other models in the Legom range. First, it activates at 50°C — among the highest activation temperatures in the lineup — and uses 55°C as its stroke reference point rather than the 25°C or 38°C used by most other models. Second, its stroke profile follows a bell-curve shape: rising from 0.3mm to a peak of 1.55mm at 60°C~65°C, then reducing back to 0.8mm at 65°C~70°C. This profile is designed for applications where maximum valve travel is needed at a specific mid-temperature peak, not at the beginning or end of the active range.
How should I read the four-row stroke table?
Each row represents a consecutive 5°C band within the active range. The first row (50°C~55°C, 0.3mm) shows minimal initial stroke as the element begins to activate. The second row (55°C~60°C, 0.8mm) shows accelerating stroke as temperature rises. The third row (60°C~65°C, 1.55mm) marks the peak of the bell curve where most valve travel occurs. The fourth row (65°C~70°C, 0.8mm) shows stroke returning to a lower value as temperature moves beyond the peak. Refer to the Temperature VS. Stroke curve in the Datasheet for the complete graphical representation.
What certifications does the LG052X hold?
The LG052X 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 LG052X?
The LG052X is rated for 100,000 actuation cycles, supporting long-term deployment in high-use installations across its 50°C to 70°C active temperature range.
Can the LG052X 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 application requires thermostatic actuation specifically within the 50°C to 70°C zone with a peak response around 60°C~65°C, the LG052X is the appropriate model. Contact us via WhatsApp or email and our team will assist with selection.
OEM & ODM Customization
Legom supports full OEM and ODM services for the LG052X 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.
