Wax Thermostatic Element LG037X

• Compact body length of 13.2mm – The shortest stroke reference length in the Legom wax element range at 38°C, making it the appropriate choice for valve assemblies with tight axial space constraints that cannot accommodate longer element bodies
• Wide total stroke of ≤6.2mm – Despite the compact body, the LG037X delivers a generous total stroke ceiling across the full 20°C to 90°C span, among the higher total strokes in the Legom range
• Four-stage stroke profile – Separate stroke data for 20°C~38°C, 38°C~45°C, 38°C~60°C (cumulative), and 20°C~90°C (total ceiling) gives valve designers a comprehensive characterization of the element’s behavior at multiple temperature milestones
• Early activation from 20°C – Begins responding at 20°C, near ambient temperature, making it suitable for applications requiring thermostatic response from room temperature through elevated operating conditions
• 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

Temperature vs. Stroke

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.

• Space-constrained thermostatic valve assemblies – The compact 13.2mm body length makes the LG037X the correct choice when overall element length is a mechanical constraint in the host valve design, such as compact inline valves, cartridge-style mixers, or miniaturized thermostatic devices
• Thermostatic mixing valves (TMV) – Applied in compact TMV designs where the element must fit within a restricted axial cavity while still delivering a wide stroke across the 20°C to 60°C comfort and anti-scald temperature range
• HVAC and air conditioning systems – Used in compact thermostatic control assemblies within heating and cooling circuits where both dimensional constraints and wide operating range requirements must be met simultaneously
• Automotive engine cooling systems – Applied in compact engine thermostats and cooling circuit controls where installation space limits the usable element length
• Sanitary and medical equipment – Integrated into compact thermostatic valve assemblies in hospital and clinical fixtures where precise temperature control is required within a space-efficient design envelope
• Plumbing, shipping, military, and other industries – Suitable for any application requiring self-acting thermostatic control across a broad temperature range within a compact element body

• The LG037X must be installed in direct contact with the fluid whose temperature it is intended to sense, ensuring accurate response across the full 20°C to 90°C operating range
• Ensure the element is fully immersed in the flow path within the host valve or assembly. The compact body length means the sensing surface area is smaller — full immersion is especially important for accurate temperature measurement
• 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 mechanism must accommodate the full total stroke of ≤6.2mm across the rated temperature range without mechanical obstruction
• 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
• For OEM integration, confirm three key parameters in writing before finalizing the order: temperature range, working stroke, and maximum load

Legom supports full OEM and ODM services for the LG037X Wax Thermostatic Element. Our engineering team can customize the activation temperature range, working stroke, body dimensions, 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.