Annular space
(AS series)



The heat exchanger AS series has three tubes. The service fluid flows through the inner and outer fluids, whereas the product flows through the annular space between the three concentric tubes, so the product receives thermal energy from both sides. The inner tubes have corrugated surfaces that increases heat exchange. It is further equipped with bellows or an expansion joint to balance out the differential expansion of the inner and outer tubes during functioning, thus considerably extending its lifespan. The outcome is a high-efficiency exchanger for complex heat transfer processes, such as those involving viscous fluids.


Recommended for the following products

  • Non-Newtonian and medium-high viscosity fluids.
  • Fluids containing small particles.


  • Shortens heat treatment times.
  • Reduces fouling.
  • Reduces the weight and volumen of the exchangers.
  • Improves the quality of the end product.
  • Decreases product loss during cleaning downtimes or product changeover.