EXT Series

The EXT Series is constructed using multiple concentric tubular coils with gas flow passages between banks of coils, ensuring low pressure drop and self-cleaning high gas velocity.

They can be used in vertical or horizontal configuration and the exhaust gas by-pass feature can be incorporated concentrically, internally or externally for maximum flexibility.

We have an extensive reference list of clients and different applications, many of which incorporate an unfired steam (SOV) or hot/superheated water boiler (SOAC/S) unit – again a Babcock Wanson designed and manufactured item – as part of the overall scope.

EXT Series Heat Recovery Coil Boiler Specications

Configuration – Horizontal or Vertical (with either upward or downward flow)
Output – Hot Water, Superheated Water, Low or High Pressure Steam, Thermal Fluid
Pressure Range – 25 bar


  • Horizontal or vertical configuration.
  • Corrosion resistant.
  • Low noise – often negates need for an exhaust silencer.
  • Robust design.
  • Low pressure drop.
  • Self-cleaning high gas velocity.
  • Suitable for use with furnaces, annealing ovens, incinerators, thermal oxidisers, diesel engines, gas turbines and more.