Wax Thermostatic Element LGA253

• Distinctive four-stage stroke profile – Includes a primary actuation band (26°C~44°C), a controlled deceleration zone (40°C~44°C), a secondary actuation band (44°C~53°C), and a total span ceiling (26°C~90°C) for precisely engineered valve response behavior
• Controlled deceleration zone at 40°C~44°C – The reduced stroke of 0.75 ± 0.08mm in this band creates a deliberate pause in piston travel, allowing valve designers to build in staged or stepped actuation behavior at a defined mid-point temperature
• Wide operating span of 26°C to 90°C – Covers both comfort-range and elevated temperatures, making it adaptable across HVAC, automotive, and industrial thermostatic applications
• 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.

• Staged thermostatic mixing valves – The multi-stage stroke profile makes the LGA253 well suited for TMV designs requiring a deliberate pause or step in valve opening at a mid-point temperature, enabling more controlled blending behavior across the 26°C to 53°C range
• Automotive engine cooling thermostats – Applied in engine cooling circuits where the thermostat must open progressively with a defined stepped response as coolant temperature rises through warm-up and into normal operating range
• HVAC zone control assemblies – Used in thermostatic control valves for heating and cooling circuits where a two-phase actuation response is preferred over a single linear opening characteristic
• Sanitary and medical fixtures – Integrated into thermostatic valve assemblies in hospital and clinical settings where the stepped actuation profile helps prevent abrupt temperature changes in water delivery
• Plumbing thermostatic devices – Applied in hot water control valves where the 44°C deceleration point aligns with standard safe hot water delivery thresholds used in anti-scald regulations
• Shipping, military, and other industries – Suitable for demanding environments requiring self-acting, staged thermostatic control without electrical dependency

• The LGA253 must be installed in direct contact with the fluid whose temperature it is intended to sense, ensuring accurate thermostatic response across all four stages of the stroke profile
• Ensure the element is fully immersed in the flow path within the host valve or assembly to prevent slow or inaccurate actuation, particularly important for elements with closely spaced stage boundaries like the 40°C~44°C deceleration zone
• 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 across any of the four stroke stages
• 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 LGA253 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.