Wax Thermostatic Element LG001X
The LG001X Wax Thermostatic Element is the flagship wide-range thermostatic actuator in the Legom lineup, combining freeze-threshold sensitivity with the broadest maximum temperature rating of 100°C. Built with Legom’s proprietary patented wax formula, it delivers consistent, repeatable stroke actuation across a rated lifespan of 100,000 cycles and has passed European product certification by accredited institutions including ACS and WRAS.
Unlike most wax elements that specify maximum stroke limits, the LG001X uses minimum stroke guarantees: ≥4mm between 1°C and 4°C, and ≥6mm between 1°C and 25°C. This means the element is engineered to deliver at least these stroke values under the specified conditions, providing a performance floor rather than a ceiling. With a testing load of 85N, a maximum temperature of 100°C, and a total stroke of ≤10mm across the full 1°C to 100°C span, the LG001X is suited for demanding applications that require guaranteed actuation output from near-freezing through high operating temperatures.
Key Benefits
- Minimum stroke guarantees, not just maximums – Unlike most wax elements, the LG001X specifies ≥4mm at 1°C~4°C and ≥6mm at 1°C~25°C, guaranteeing a performance floor that the element will always meet or exceed under specified conditions
- Maximum temperature rating of 100°C – Alongside the LG005X, the LG001X is rated to the highest maximum temperature in the Legom wax element range, suitable for solar thermal, high-temperature HVAC, and industrial applications
- Full-span operation from 1°C to 100°C – Active from near-freezing through full high-temperature operation, covering both freeze protection and standard thermal control in a single element
- High testing load of 85N – Provides strong actuation force across the operating range, suitable for valve assemblies requiring firm piston engagement
- 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 | LG001X |
| Material | Copper |
| Maximum Load | 140N |
| Minimum Load | 45N |
| Testing Load | 85N |
| Spring Rate | 5N/mm |
| Maximum Temperature | 100°C |
| Stroke | L = 24 ± 0.5mm at 25°C, 55N |
| Lifespan | 100,000 cycles |
| Certification | ACS, WRAS |
Temperature vs. Stroke
| Temperature (°C) | Stroke (mm) |
|---|---|
| 1°C ~ 4°C | ≥ 4 |
| 1°C ~ 25°C | ≥ 6 |
| 1°C ~ 100°C | ≤ 10 |
The ≥ values specify minimum guaranteed stroke output under the stated conditions. The ≤10mm value for the full 1°C to 100°C span represents the total stroke ceiling. Refer to the Temperature VS. Stroke curve in the Datasheet for the complete graphical representation of both heating-up and cooling-down cycles.
Application & Use Cases
- Anti-freeze valve assemblies – The guaranteed minimum stroke of ≥4mm at 1°C~4°C makes the LG001X a reliable actuator for freeze protection valves in heat pump systems, outdoor piping, and any installation exposed to sub-4°C temperatures
- Solar thermal systems – The 100°C maximum temperature rating accommodates the high fluid temperatures in solar collector circuits, while the low-end sensitivity down to 1°C covers overnight or winter standby conditions
- Thermostatic mixing valves (TMV) – The guaranteed ≥6mm stroke across 1°C~25°C ensures the element delivers sufficient piston travel for full valve actuation across the ambient-to-warm water range
- HVAC and heat pump systems – Applied in thermostatic control assemblies for systems that must remain proportionally active from near-freezing startup temperatures through full heating operation
- Automotive engine cooling systems – Applied in thermostats requiring reliable actuation beginning from very low coolant temperatures at cold-start through full engine operating temperature
- Plumbing, sanitary, shipping, military, and other industries – Suitable for any application requiring self-acting thermostatic control with guaranteed minimum performance across a very wide temperature span
Installation Notes
- The LG001X must be installed in direct contact with the fluid whose temperature it is intended to sense, ensuring accurate thermostatic response across the full 1°C to 100°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 100°C, as this is the maximum rated temperature. Sustained exposure beyond this limit may permanently degrade the wax charge
- Avoid applying forces exceeding the maximum load of 140N to the piston during assembly or operation
- The host valve assembly must be designed around the guaranteed minimum stroke values. At 1°C~4°C the element delivers at least 4mm, and at 1°C~25°C at least 6mm. The valve mechanism must open fully within these stroke limits
- 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 actuation, especially important given the element’s sensitivity starting from 1°C
- For OEM integration, confirm three key parameters in writing before finalizing the order: temperature range, working stroke, and maximum load
Frequently Asked Questions
What does the ≥ symbol mean in the stroke table, and why is the LG001X specified differently from other models?
Most Legom wax elements use ≤ (maximum) or ± (target with tolerance) in their stroke tables, specifying how much the piston moves under given conditions. The LG001X uses ≥ (minimum) for the first two rows, meaning the element is guaranteed to deliver at least 4mm of stroke between 1°C and 4°C, and at least 6mm between 1°C and 25°C. This specification approach gives valve designers a guaranteed performance floor, ensuring the element will always deliver enough stroke to fully actuate the valve regardless of unit-to-unit variation. The third row (≤10mm for 1°C~100°C) is the total stroke ceiling across the full operating span.
How does the LG001X compare to the LG002X, which has a similar operating range?
Both models operate from near-freezing through 90°C or 100°C, but they differ in how stroke is specified and in their testing loads. The LG002X specifies stroke as ≤ values (maximums), while the LG001X specifies ≥ values (minimums) for the lower temperature bands. The LG001X also has a higher testing load at 85N versus 90N for the LG002X, and a higher maximum temperature at 100°C versus 90°C. Choose the LG001X when guaranteed minimum stroke output is a design requirement, or when the system operates above 90°C.
What certifications does the LG001X hold?
The LG001X 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 LG001X?
The LG001X is rated for 100,000 actuation cycles, supporting long-term deployment in high-use installations across its full 1°C to 100°C operating temperature range.
Can the LG001X 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 LG001X 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.
