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Annular Space – HRS AS Series

The HRS AS 3 Series is a fully stainless steel, triple tube heat exchanger designed for applications with viscous products. The product flows through the annular space and the service fluid flows through the inner and outer tubes to ensure even heating or cooling.

The removable inner tube allows for easy inspection of the annular space. Using HRS’ corrugated tube technology, both heat transfer and efficiency are increased over standard smooth tube heat exchangers. In addition, potential fouling is minimised.


Typical applications of the HRS AS Series heat exchanger include:

  • Higher Viscosity Products
  • Fluids containing fibres or small particles



  • Service side: AISI 304 stainless steel
  • Product side: AISI 316L stainless steel
    Other material options available


  • Service side: flanged
  • Product side: clamp

Surface Finish:

  • External: Satin or Polished
  • Internal:  <0.8μ
    All flange & clamp types available

Design code and compliance:

  • PED 2014/68/EU, PD5500, EN 13445, ASME
  • FDA, 3A, GOST, DOSH Compliant
_HRS Annular Space Heat Exchangers
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