Precision and reliability are paramount in the Aerospace and Defense industry to ensure that essential systems run efficiently. Thermal Actuator technology offers a versatile solution for remote, extreme, and unique design challenges.

With a simple yet highly effective mechanism, thermal actuators deliver forceful, self-powered operation for demanding applications.

What is a Thermal Actuator?

Thermal Actuators are devices that use the controlled thermal expansion/contraction of certain materials to exert force on adjacent components and convert thermal energy into mechanical motion. The action created by this force can be a push/pull, open/close, or load-motion action.

These actuators control the motion of fluid or gas in response to temperature fluctuations by leveraging the unique properties of paraffin wax. Wax undergoes a phase transition when exposed to temperature changes, expanding and contracting reliably and predictably.

This behavior drives precise, controlled mechanical motion, ideal for demanding applications where reliability is non-negotiable.

Benefits of Thermal Actuators

• Self-Operating — No external power to function
• Maintenance-Free — No periodic calibration is needed
• Low SWaP (Size, Weight, and Power) — Compact and efficient
• Fewer Components — Minimizes failure points

Applications for thermal actuators include military aircraft that house fuel heaters, oil coolers, and avionics cooling assemblies, as well as military vehicles with hydraulic cold-start systems. High Output Paraffin Actuators (HOPAs) can be used for applications requiring higher force or displacement.

The Role of HOPAs in Aerospace and Defense

HOPAs shine in applications requiring high force over short distances, delivering a powerful yet gentle stroke. HOPAs can deliver over 1,000 lbs. of force, making them a unique solution for critical actuation needs.

Why HOPAs Excel in Demanding Environments

These actuators are particularly valuable in extreme environments like space, where they withstand radiation, vacuum conditions, and temperature extremes without compromise. Their adaptability extends to operating under pressure or vacuum in liquid and gaseous media. With negligible outgassing and resistance to extreme conditions, HOPAs maintain performance in environments where other systems may fail.

Key HOPA Applications Include

• Space Exploration: HOPAs are used in satellites and spacecraft. Their non-explosive nature makes them a safer alternative to traditional explosive bolts, which can damage nearby equipment. They also allow the product to be tested prior to deployment.
• Underwater Missions: HOPAs provide reliable performance for tasks like coolant management in fuel cells of underwater systems. They are also valued for their quiet operation when stealth is a mission requirement.

Advancing Aerospace and Defense with HOPAs
High Output Paraffin Actuators offer a unique combination of reliability, efficiency, and adaptability to advance the capabilities of modern aerospace and defense systems. As challenges in these industries grow, HOPAs offer a resilient, cost-effective solution to meet future demands.

Explore ThermOmegaTech’s HOPA Solutions

Discover how this cutting-edge technology can elevate your operations. Since 1983, ThermOmegaTech has been at the forefront of thermal actuator technology, delivering tailored solutions for aerospace and defense. Their proprietary Thermoloid® blend of paraffin wax and additives ensures unmatched precision and durability. With a focus on quality and innovation, ThermOmegaTech supports mission-critical operations worldwide.

See how HOPAs work here!