Claro designs & manufactures proprietary ModuTube™ modular tube-in-shell heat exchangers that are simple to install & disassemble, deliver maximum heating & cooling transfer efficiencies, & require no maintenance attention. Consistent & large throughput diameters prevent clogging even with poorly screened sludges & other process liquids. Design principles & custom sizings for your application yield heat exchangers that are self-cleaning – no requirement to open the unit to clean heat transfer surfaces.

Applications include a wide variety of municipal & industrial uses including: digester sludge heating, heat/energy recovery from incinerators & industrial processes, the heating & cooling requirements of biosolids renewable fuel processes, pulp & paper, food processing, & other contexts.

Our patented modular design enables standard & precise custom capacities and easy capacity expansion to meet future requirements. Ask us how we can provide near-zero footprint heat exchangers and install our units in difficult-to-access areas without the destruction of any plant infrastructure. Retrofits match to existing piping & number of circuits. All sizes & footprints are guaranteed delivery within exceptionally short delivery times.

Recover up to 85% of outgoing heat energy from process tanks such as anaerobic digesters with Claro heat exchangers. Immediate energy cost-savings & very quick pay-back periods.

2 ModuTube™ Sludge Heat Exchangers – Self-Supporting

2 ModuTube™ Sludge Heat Exchangers – Self-Supporting

ModuTube™ Sludge Heat Exchanger – Wall Mounted

ModuTube™ Sludge Heat Exchanger – Saving Space after Removal of Traditional Heat Exchanger Units

3 ModuTube™ Sludge Heat Exchangers – Self-Supporting
Design features & advantages
  • Modular construction = easy to install—even in difficult-to-access areas.
  • Non-clog design/ultra-low maintenance.
  • Quick & direct access to heat exchanger internals.
  • Compact units with small, flexible, or even near-zero footprint.
  • Standard units & custom-designed units.
  • Minimal pressure drops/constant sludge velocities.
  • Water-to-sludge & direct sludge-to-sludge configurations.
  • Cost-efficient heating or cooling of sludge & other media.
  • Optimal approaches to dimpling for increased heat transfer efficiencies.
  • Continuous, non-mitered return bends.
  • Meets ASTM pressure vessel requirements & ISO 9001 fabrication.
  • Stainless, mild-steel, and other steel alloy units available.
  • Recover up to 85% of outgoing heat from process tanks such as anaerobic digesters.
  • Minimal capital investment & immediate, significant energy cost savings.
  • Heat exchanger farm & energy recovery storage tank systems available.
  • Retrofits match to existing piping & installs without disturbing plant infrastructure.
  • All sizes & footprints guaranteed delivery within short timeframe.
  • Complete hydronic piping design advice also available.

We welcome your enquiries. For more information, please contact us at