Wax Thermostatic Element LG008X
The LG008X Wax Thermostatic Element is a high-force, multi-stage thermostatic actuator engineered for applications requiring controlled mechanical response across a 40°C to 60°C primary activation range. Built with Legom’s proprietary patented wax formula, the LG008X 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.
With a maximum load capacity of 180N and a three-stage stroke profile spanning 30°C to 90°C, the LG008X is designed for integration into thermostatic valve assemblies requiring proportional actuation across a broader operating range. Constructed from copper with a spring rate of 5N/mm, the element delivers graduated piston movement that mirrors the progressive nature of heat transfer in demanding plumbing, HVAC, and industrial applications.
Key Benefits
- Three-stage stroke profile – Separate stroke specifications for 40°C~50°C, 50°C~60°C, and 30°C~90°C ranges enable precise proportional control at different points within the operating temperature span
- High maximum load of 180N – Suitable for heavier valve assemblies and applications where standard 140N elements cannot provide sufficient actuation force
- Broad operating range – Total stroke of ≤4.5mm across 30°C to 90°C makes the LG008X adaptable to systems with wide temperature fluctuations
- 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 | LG008X |
| Material | Copper |
| Maximum Load | 180N |
| Minimum Load | 65N |
| Testing Load | 75N |
| Spring Rate | 5N/mm |
| Maximum Temperature | 90°C |
| Stroke | L = 19.7 ± 0.25mm at 45°C, 75N |
| Lifespan | 100,000 cycles |
| Certification | ACS, WRAS |
Temperature vs. Stroke
| Temperature (°C) | Stroke (mm) |
|---|---|
| 40°C ~ 50°C | 1.4 ± 0.2 |
| 50°C ~ 60°C | 1.26 ± 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.
Application & Use Cases
- Thermostatic mixing valves (TMV) – Installed as the thermostatic actuator in hot water mixing valves requiring proportional control across a graduated temperature range, rather than a single sharp activation point
- Anti-scald and hot water safety devices – Applied in commercial and institutional plumbing systems where the valve must respond progressively as water temperature rises through the 40°C to 60°C range
- Industrial HVAC and process heating – Used in heavy-duty valve assemblies within industrial heating circuits where both high actuation force and multi-stage stroke control are required
- Automotive engine cooling systems – Applied in thermostats and cooling circuit controls requiring precise, graduated actuation across a broad mid-temperature operating range
- Sanitary and medical equipment – Integrated into thermostatic assemblies for hospital and laboratory fixtures requiring defined, proportional hot water delivery control
- Shipping, military, and other industries – Suitable for demanding environments where high-force, self-acting temperature-responsive actuation is required without electrical dependency
Installation Notes
- The LG008X must be installed in direct contact with the fluid whose temperature it is intended to sense, ensuring accurate thermostatic response across the full 30°C to 90°C operating 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
- The LG008X has a maximum load of 180N. Verify that the host valve mechanism does not impose forces beyond this limit during full stroke 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 incorrect actuation
- 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 LG008X different from the LG013X, which has a similar load rating?
Both the LG008X and LG013X share the same 180N maximum load rating, but their stroke profiles differ. The LG013X provides a single primary actuation stroke of 2.15mm between 45°C and 60°C, suited to applications needing a defined activation point. The LG008X provides a three-stage stroke profile with separate specifications for 40°C~50°C, 50°C~60°C, and 30°C~90°C, making it more appropriate for applications requiring proportional control across a broader and more graduated temperature range.
What certifications does the LG008X hold?
The LG008X 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 LG008X?
The LG008X is rated for 100,000 actuation cycles, supporting long-term deployment in high-use commercial and industrial installations.
How should I interpret the three-row stroke table?
The three rows represent different segments of the element’s operating range. The first two rows (40°C~50°C and 50°C~60°C) specify the controlled actuation strokes within each sub-range, showing how the piston moves progressively as temperature increases through these bands. The third row (30°C~90°C) gives the total cumulative stroke across the full operating span, which is ≤4.5mm. Refer to the Temperature VS. Stroke curve in the Datasheet for the full graphical representation of both heating-up and cooling-down cycles.
Can the LG008X 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 you are unsure about any of these parameters, the Legom team can assist with selection or develop a custom element. Contact us via WhatsApp or email to begin the process.
OEM & ODM Customization
Legom supports full OEM and ODM services for the LG008X 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.
