Wax Thermostatic Element LG065X
The LG065X Wax Thermostatic Element is a light-duty, five-stage thermostatic actuator sharing the same stroke profile as the LG068X while offering a tighter stroke reference tolerance of ±0.25mm at the 38°C reference point. Built with Legom’s proprietary patented wax formula, it delivers consistent, repeatable stroke actuation from 15°C to 90°C 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 of 90N, a spring rate of 1N/mm, and an identical five-stage stroke profile to the LG068X including the deceleration zone at 35°C~38°C, the LG065X is suited for valve assemblies requiring the high-stroke light-duty profile where tighter dimensional tolerance at the activation reference point is a design requirement. Total stroke ceiling is 5.4mm across the full 15°C to 90°C span.
Key Benefits
- Tighter stroke reference tolerance – Stroke reference of L = 18 ± 0.25mm at 38°C, 45N is more precise than the LG068X (±0.3mm), making the LG065X suitable for applications where dimensional consistency at the activation point is a tighter requirement
- Identical high-stroke profile to LG068X – Delivers the same five-stage stroke output including 1.8mm at 15°C~38°C, 2.4mm cumulative at 38°C~60°C, and a 5.4mm total ceiling, maintaining the highest stroke output in the Legom light-duty range
- Deceleration zone at 35°C~38°C – Reduced stroke of 0.6mm in this narrow 3°C band creates a deliberate pause between the lower and upper actuation bands, shared with the LG068X and LG071X profile structures
- Light-duty 90N platform – Designed for valve assemblies with low-resistance return springs where standard 140N elements would overdrive the host mechanism
- Ultra-soft spring rate of 1N/mm – Enables precise, controlled piston travel in low-resistance valve assemblies where standard 5N/mm elements would cause over-actuation or mechanical damage
- 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
- 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 | LG065X |
| Material | Copper |
| Maximum Load | 90N |
| Minimum Load | 15N |
| Testing Load | 45N |
| Spring Rate | 1N/mm |
| Maximum Temperature | 90°C |
| Stroke | L = 18 ± 0.25mm at 38°C, 45N |
| Lifespan | 100,000 cycles |
| Certification | ACS, WRAS |
Temperature vs. Stroke
| Temperature (°C) | Stroke (mm) |
|---|---|
| 15°C ~ 38°C | 1.8 ± 0.2 |
| 35°C ~ 38°C | 0.6 ± 0.05 |
| 38°C ~ 46°C | 1.6 ± 0.15 |
| 38°C ~ 60°C | 2.4 ± 0.25 |
| 15°C ~ 90°C | 5.4 (Max) |
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
- Precision light-duty thermostatic mixing valves – The tighter stroke reference tolerance (±0.25mm) makes the LG065X suited for TMV assemblies where consistent element length at the 38°C reference point is a manufacturing or quality control requirement
- Compact plumbing and sanitary devices – Applied in small-format thermostatic valves where both mechanical constraints and dimensional consistency requirements are present simultaneously
- Automotive cooling system thermostats – Used in thermostats with lighter valve designs requiring consistent element length at the activation reference point across production batches
- HVAC and air conditioning systems – Applied in low-resistance thermostatic control assemblies where the combination of high stroke output and tighter dimensional tolerance at 38°C is a design specification
- Sanitary and medical equipment – Integrated into precision thermostatic assemblies where unit-to-unit dimensional consistency is critical for reliable staged temperature control
- Shipping, military, and other industries – Suitable for specialized applications requiring self-acting, high-stroke light-duty thermostatic control with tighter dimensional specification
Installation Notes
- The LG065X must be installed in direct contact with the fluid whose temperature it is intended to sense, ensuring accurate thermostatic response across all five stages of the stroke profile
- Ensure the element is fully immersed in the flow path within the host valve or assembly. Partial immersion will reduce the effective stroke output, particularly in the lower 15°C~35°C band
- Do not expose the element to temperatures exceeding 90°C, as sustained exposure above the maximum rated temperature may permanently degrade the wax charge
- The LG065X has a maximum load of only 90N. Do not use this element in valve assemblies with return springs rated above this force
- The spring rate of 1N/mm is significantly softer than standard Legom models. Ensure the host valve return spring stiffness is matched to this spring rate to achieve accurate piston reset on cooling
- Keep the element away from external heat sources not part of the intended sensing medium to avoid premature actuation across any of the five stroke stages
- For OEM integration, confirm three key parameters in writing before finalizing the order: temperature range, working stroke, and maximum load
Frequently Asked Questions
What is the difference between the LG065X and the LG068X?
The LG065X and LG068X share identical stroke profile values across all five temperature bands and the same mechanical load specifications. The primary documented difference is the stroke reference tolerance: the LG065X specifies L = 18 ± 0.25mm at 38°C, 45N, while the LG068X specifies L = 18 ± 0.3mm at the same conditions. The LG065X also has a different body diameter as shown in the dimension drawings. Choose the LG065X when tighter dimensional tolerance at the 38°C reference point or a specific body diameter is required for the host valve assembly.
How should I read the five-row stroke table?
The first row (15°C~38°C, 1.8mm) gives the initial lower-temperature actuation band. The second row (35°C~38°C, 0.6mm) is the narrow deceleration zone across just 3°C. The third row (38°C~46°C, 1.6mm) shows resumed actuation above 38°C. The fourth row (38°C~60°C, 2.4mm) gives the cumulative stroke from 38°C to 60°C. The fifth row (15°C~90°C, 5.4mm max) gives the total stroke ceiling across the full operating span. Refer to the Temperature VS. Stroke curve in the Datasheet for the complete graphical representation.
What certifications does the LG065X hold?
The LG065X 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 LG065X?
The LG065X is rated for 100,000 actuation cycles, supporting long-term deployment in high-use installations across its full 15°C to 90°C operating range.
Can the LG065X be customized for different load or temperature requirements?
Yes. Legom offers full OEM and ODM customization. If your application requires a different activation temperature, working stroke, load specification, or dimensional tolerance, 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, the maximum load the element must deliver, and dimensional tolerances for the host assembly. If you are deciding between the LG065X and LG068X, the choice comes down to whether tighter stroke reference tolerance or a specific body diameter is required. 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 LG065X Wax Thermostatic Element. Our engineering team can customize the activation temperature range, working stroke, maximum load, and dimensional tolerances 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.
