Discover our latest innovation designed

Introducing our new range of commercial off-the-shel f (COTS) heat pipes, designed specifically for satellite temperature control. Our ready-to-use solutions offer unrivalled performance and reliability, enabling you to meet your project deadlines with ease.









Explore our selection of pre-configured heat pipes in a range of sizes and specifications, ready for immediate deployment.


Take advantage of the various configurations available to suit your needs. Contact us directly for heat pipes requiring a customised design.



Working fluid

Diameter (mm)

Operating T° range


Power (xx)






Multiple bends & 3D possible









Technical benefits and performance capabilities

Heat pipes are passive heat transfer components based on the use of a two-phase fluid. Most of EHP heat pipes are made of aluminum extruded profiles filled with ammonia. Our products portfolio also includes other models of heat pipes with a large variation of size, diameter, fluid, material, heat flux, etc. 

Space-qualified components available off-the-shelf or customized products based on your precise needs, both are possible. EHP can design innovative solutions with full customization. 

EHP also delivers equipment for spacecraft propulsion or thermal control, like ultra-clean piping (rigid or flexible). 

Based on the latent heat of the working fluid, heat pipes act as highways for the heat. Completely passively, they homogenize the temperature in every point of themselves and allow to transport power. 

The working principle is the following: 
• In front of the hot source, the liquid is evaporated. 
• Then the vapor goes through the pipe to the cold source. 
• In front of the cold source, the vapor is condensed. 
• The liquid goes back to the hot source because of capillary pressure created by a groove or a mesh and the cycle continues. 

With more than 40 years of heritage, EHP has manufactured many different heat pipes made of different materials (aluminum, stainless steel, copper, etc.) and working fluids (ammonia, propylene, water, etc.). 

full in-house capacity and test facilities

At EHP, our commitment to excellence goes beyond the manufacture of thermal and mechanical systems for spacecraft. We have advanced test simulations, which are essential to our success and product quality. We are equipped with a 125kN Shaker (1.5m x 1.5m), a thermal cycle climatic chamber (3m x 2m), a thermal vacuum chamber (1.5m x 1m), the largest X-ray bunker in Belgium, etc.), as well as a large thermal vacuum chamber.

Space heritage and adoption

OneWeb constellation

EHP has been the sole supplier for heat pipes of the the OneWeb GEN1 megaconstellation (> 648 satellites). The OneWeb project started a new era for EHP heat pipes product line: a new dedicated production line has been built and delivers now 4.000 heat pipes per year and per shift. With the signature of additional contracts, following the end of the OneWeb deliveries, EHP became the leader of Space heat pipes.

100,000,000 spaceflight hours heritage with no in-orbit failure

With a cumulative heritage of 100,000,000 flight hours in space, our products have established a significant track record in space. Notably, none of our products have ever failed in orbit, including our heat pipes, loop heat pipes and deployable pointing systems.

At any one time, around 6,000 EHP products are operating silently above us, providing reliable temperature control for many missions in the demanding conditions of space. This remarkable milestone represents more than just numbers; it underlines our unwavering commitment to excellence and innovation in thermal control technology.

From communications satellites orbiting the Earth to science projects to Jupiter, EHP products have contributed to the success of missions around the world.