Graphite block heat exchangers

graphilor heat exchanger Mersen
polybloc heat exchanger Mersen
graphite heat exchanger Mersen

Respectively named Polybloc® for the cylindrical design and Hykarb® for the cubic ones, Mersen's heat exchangers are based on Graphilor® 3, the only isostatic ultra-fine graphite.

They are used in fields such as:

  • Metallurgy: pickling bath, HCl, H2SO4, HF, HNO3
  • Chemical: pigments, heat recovery on corrosive process, VCM, TDI, etc...
  • Fine chemicals and pharmaceuticals

Mersen graphite block heat exchangers are manufactured with its exclusive trademark graphite: Graphilor® 3, the only impregnated graphite resulting from the combination between isostatic graphite and a specific resin.

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Graphilor® 3 key advantages

  • Particularly high resistance to corrosion
  • Very good temperature resistance
  • Excellent refractory qualities and mechanical properties
  • Non-contaminating properties


Key features:

  • Graphilor® 3 with three standard impregnations (phenolic, carbon and PTFE)
  • Multi-passing for both process and service sides
  • Shell in carbon steel, PTFE-lined or FRP or various alloys
  • Heat exchange areas up to 300 m²
  • Carbon fiber reinforced graphite, in option
  • Large blocks sizes range from 140 to 1 800 mm diameter
  • Drilling adapted to process
  • Design pressure service side maximum 16 barG and process side maximum 12 barG
  • Design temperature up to 430°C


Customer Benefits:

  • High corrosion resistance of Graphilor® 3
  • Compactness
  • Robustness
  • Modular design
  • Easy maintenance
  • Long lifetime
  • After-Sales Service on 3 continents ; more than 20 Repair Shops
  • Manufacturing sites in Europe, USA and China