Wax Thermostatic Element LG016X/17X
The LG016X and LG017X Wax Thermostatic Elements are mid-range temperature actuators engineered for applications requiring precise mechanical response in the 22°C to 60°C activation range. Built with Legom’s proprietary patented wax formula, both models deliver consistent, repeatable stroke actuation across a rated lifespan of 100,000 cycles. They have passed European product certification by accredited institutions including ACS and WRAS.
Both models share the same copper body construction and mechanical load specifications, differing in their stroke output profile. The LG016X delivers a two-stage stroke across a wider temperature span up to 60°C, while the LG017X delivers a higher single-stage stroke optimized for the 22°C to 44°C actuation window. Both are constructed from copper with a maximum load capacity of 140N and a spring rate of 5N/mm.
Key Benefits
- Two variants for different stroke profiles – LG016X provides a progressive two-stage stroke up to 60°C for wider temperature span applications; LG017X delivers a higher single-stage stroke in the 22°C to 44°C range for applications requiring greater piston travel within a narrower band
- 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
- High load capacity – Maximum load of 140N with testing load of 50N and minimum load of 40N, providing sufficient actuation force for demanding valve assemblies
- 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 |
|---|---|
| Models | LG016X / LG017X |
| Material | Copper |
| Maximum Load | 140N |
| Minimum Load | 40N |
| Testing Load | 50N |
| Spring Rate | 5N/mm |
| Maximum Temperature | 90°C |
| Stroke (at rest) | L = 0mm at 22°C, 37N |
| Lifespan | 100,000 cycles |
| Certification | ACS, WRAS |
Temperature vs. Stroke
| LG016X | |
|---|---|
| Temperature (°C) | Stroke (mm) |
| 22°C ~ 44°C | 2 ± 0.25 |
| 22°C ~ 60°C | 4.5 ± 0.5 |
| LG017X | |
| Temperature (°C) | Stroke (mm) |
| 22°C ~ 44°C | 3.5 ± 0.25 |
All Models and Specifications
| Item No | Temperature | Force | Length of Extend (mm) |
|---|---|---|---|
| LG016X | 22°C | 37N | 0 |
| 44°C | 50N | 2 ± 0.2 | |
| 60°C | 68.5N | 4.5 ± 0.5 | |
| LG017X | 22°C | 37N | 0 |
| 44°C | 50N | 3.5 ± 0.5 |
Application & Use Cases
- Thermostatic mixing valves (TMV) – Installed as the thermostatic actuator in hot water mixing valves to regulate blended outlet temperature in residential and commercial plumbing systems
- HVAC and air conditioning systems – Provides temperature-responsive mechanical actuation in water circuit control assemblies, suitable for systems with moderate operating temperature ranges
- Plumbing and sanitary fixtures – Used in shower valves, basin mixers, and other fixtures requiring consistent temperature-controlled water delivery
- Automotive applications – Applied in engine cooling thermostats and climate control assemblies requiring reliable wax-actuated response in the mid-temperature range
- Shipping and marine systems – Suitable for temperature management in engine cooling and fluid systems aboard vessels operating in moderate temperature environments
- Military and defense equipment – Used where reliable, self-acting temperature-responsive mechanical actuation is required under demanding conditions
Installation Notes
- The element must be installed in direct contact with the fluid whose temperature it is intended to sense, ensuring accurate and consistent thermostatic response
- 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 to avoid premature or incorrect actuation
- Select the correct variant before ordering – choose LG016X for applications requiring progressive stroke across a wider temperature range up to 60°C, or LG017X for applications needing higher stroke output within the 22°C to 44°C band
- For OEM integration, confirm the three key parameters in writing before finalizing the order: temperature range, working stroke, and maximum load
Frequently Asked Questions
What is the difference between LG016X and LG017X?
Both models share the same body dimensions, material, and mechanical load ratings. The difference lies in their stroke output profiles. The LG016X delivers a progressive two-stage stroke: 2mm at 44°C and 4.5mm at 60°C, making it suitable for applications that benefit from graduated actuation across a wider temperature range. The LG017X delivers 3.5mm of stroke at 44°C with no data beyond that point, making it the better choice when higher piston travel is needed within the lower part of the temperature range. Contact the Legom team if you are unsure which variant fits your application.
What certifications do the LG016X and LG017X hold?
Both models have passed European experimental institution product certification under ACS and WRAS standards, confirming their suitability for use in drinking water systems and broader HVAC and plumbing applications.
What is the expected service life?
Both the LG016X and LG017X are rated for 100,000 actuation cycles, supporting long-term deployment in high-use installations such as commercial plumbing systems and building services applications.
Can these elements 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 based on your product requirements. Contact us via WhatsApp or email to begin the process.
What industries use the LG016X and LG017X?
These models are used across plumbing, sanitary, HVAC, air conditioning, automotive, shipping, military, and other industries where reliable self-acting temperature-responsive mechanical actuation is required in the mid-temperature range of 22°C to 60°C.
OEM & ODM Customization
Legom supports full OEM and ODM services for the LG016X and LG017X Wax Thermostatic Elements. 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.
