Corrugated Quadruple Tube (CQT)

The APV ParaTube CQT is a unique design that allows significant flexibility in an annulus gap to optimize heat transfer and pressure drop. It allows balancing of flow rates and pressure drop ratios between the inner and outer annulus. This feature is critical to successful heat transfer of laminar and/or non-Newtonian fluids, particularly when applying it to product-to-product regeneration.


  • Working temperatures up to 545°F/285°C
  • Design pressures to 871 psig/60 bar
  • Flexibility in materials of construction from carbon steel to special alloys
  • High particulate capacities
  • Can handle high viscosity products
  • Resistant to fouling
  • Robust
  • Easy maintenance


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