Wax Thermostatic Element LG018X

The LG018X Wax Thermostatic Element is a high-temperature thermostatic actuator engineered for applications requiring precise mechanical response in the 54°C to 58°C activation range. Built with Legom’s proprietary patented wax formula, the LG018X 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.

Constructed from copper with a maximum load capacity of 140N and a spring rate of 5N/mm, the LG018X is designed for integration into thermostatic mixing valves, sanitary anti-scald devices, and other high-temperature control assemblies where accuracy and long service life are critical. The element supports a customizable temperature range of 24°C to 113°C and loading range of 43.5N to 87N for OEM applications.


Key Benefits
  • High-temperature activation range – Designed to actuate precisely between 54°C and 58°C, making it suitable for hot water temperature control and anti-scald protection in plumbing and sanitary systems
  • 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 a testing load of 65N and minimum load of 45N, providing sufficient actuation force for demanding valve assemblies
  • Wide customizable range – Temperature range customizable from 24°C to 113°C and loading range from 43.5N to 87N for OEM and ODM integration
  • 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 confirmed and customized to suit specific product requirements

Technical Specifications
Parameter Specification
Model LG018X
Material Copper
Maximum Load 140N
Minimum Load 45N
Testing Load 65N
Spring Rate 5N/mm
Maximum Temperature 90°C
Stroke X ≤ 2.5mm at 54°C, 65N
Lifespan 100,000 cycles
Certification ACS, WRAS

Temperature vs. Stroke

Temperature (°C) Stroke (mm)
54°C ~ 58°C 3.5 ± 0.35

All Models and Specifications

Parameter Range
Temperature Range 24°C – 113°C
Loading Range 43.5N – 87N
X1 Stroke Range 2.3mm – 6.3mm

Application & Use Cases
  • Thermostatic mixing valves (TMV) – Installed as the thermostatic actuator in hot water mixing valves used in residential and commercial plumbing systems, controlling blended outlet temperature to prevent scalding
  • Anti-scald devices – Used in shower valves, basin mixer taps, and hospital fixtures where hot water delivery must be limited to a safe temperature threshold
  • Sanitary and medical equipment – Precision temperature control in hygiene-sensitive installations where consistent actuation at a defined temperature is a safety requirement
  • HVAC and air conditioning systems – Provides temperature-responsive mechanical actuation in water circuit control assemblies within heating and cooling systems
  • Automotive applications – Used in engine cooling thermostats and climate control assemblies requiring reliable wax-actuated response at elevated temperatures
  • Shipping, military, and other industries – Suitable for demanding environments where self-acting temperature-responsive actuation is required without electrical dependency

Installation Notes
  • The LG018X 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 to prevent damage to the element body or piston seal
  • 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 that are not part of the intended sensing medium, as stray heat can cause premature or incorrect actuation
  • 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 makes the LG018X different from other wax thermostatic elements in the Legom range?

The LG018X is specifically calibrated to activate in the 54°C to 58°C temperature range, making it the appropriate choice for hot water anti-scald and thermostatic mixing valve applications where the control point is near the standard safe hot water delivery temperature. Other models in the Legom range are calibrated for different temperature ranges. Contact the Legom team to identify the correct model for your specific activation temperature requirement.

What certifications does the LG018X hold?

The LG018X 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 LG018X?

The LG018X is rated for 100,000 actuation cycles, supporting long-term deployment in high-use installations such as commercial plumbing systems and building services applications.

Can the LG018X be customized for a different activation temperature?

Yes. The LG018X supports a customizable temperature range of 24°C to 113°C with a loading range of 43.5N to 87N and an X1 stroke range of 2.3mm to 6.3mm. If your application requires a different activation point within these ranges, the Legom engineering team can develop a customized specification. Written confirmation of the three key parameters is required before any customization project begins: temperature range, working stroke, and maximum load.

How do I select the correct wax thermostatic element model 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’s requirements. Contact us via WhatsApp or email to begin the process.

What industries use the LG018X?

The LG018X is 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-to-high temperature range.


OEM & ODM Customization

Legom supports full OEM and ODM services for the LG018X Wax Thermostatic Element. Our engineering team can customize the activation temperature range, working stroke, and maximum load within the supported specification range. 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.

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