LWC Gasketed Plate Heat Exchangers

Laser-Welded Cassettes


The Laser Welded Cassette is for applications with aggressive media that might exceed the limits of gasket seals. Well-suited for ammonia applications in: HVAC, Refrigeration, Chemical, Food.

  • Laser-welded cassettes (LWC) plate heat exchangers
    LWC plate heat exchangers
  • LWC plate heat exchangers
    LWC plate heat exchangers

Ideal for Ammonia-based Systems
Plates are laser-welded in pairs, eliminating the gaskets between them, allowing the use of ammonia and other agressive media that would normally exceed the limits of standard gasketed plate heat exchangers.The greater efficiency of the LWC means a smaller ammonia charge, reducing cost and maintenance.

A variety of sizes and plate configurations combine with sophisticated selection software to ensure a perfect customization for your needs. The compact footprint allows you to use it in locations that you wouldn’t dream of with a shell-and-tube heat exchanger.

Now Even More Versatile!  We now offer oxygen-free welding, which adds corrosion resistance AND makes it possible to supply such diverse plate materials as C-276, SMO 254, Alloy 686 and numerous others.  Contact us for the full list.

Higher Performance at a Lower Cost
Optiwave™ plate corrugations distribute the media evenly across the entire plate width, maximizing heat transfer and minimizing the number of plates (and cost) required.

Peace of Mind
Over 75 years of experience in designing and crafting high performance plate heat exchangers. Independent performance certification through ASME and other programs.

Convenient Maintenance
PosLoc™ plate lead-ins cause the plate pack to self-align when re-installing during maintenance. Ecoloc™ tools-free gaskets make gasket replacement a snap. Individual plates mean no heavy lifting tools. The result is faster, more efficient maintenance, with shorter down times.

Technical Details:

  • Heat Transfer Plate Material: 316 Stainless as standard. Others on request.
  • Gasket: NBR, NBR High Temperature, EPDM, EPDM High Temperature, Viton, and others on request.
  • Port Connection: Metal Lined (Stainless, Titanium and others on request) Welded Neck Flange, and others on request.
  • Pressure Plate: Carbon Steel as standard, others on request.
  • Maximum Pressure: Maximum standard pressure for the refrigerant side is 360 psig (25 bar). Maximum standard pressure is 225 psig (16 bar) for the non-refrigerant side.
  • Temperature Range: Varies with the media and gasket selection. Maximum is 410°F (210°C). Minimum is -49°F (-45°C). Contact us for details.
  • Rated Liquid Flow Rate:  LWC100: 830 gpm (190m³/hour), LWC150: 1540 gpm (350m³/hour), LWC250: 3960 gpm (900m³/hour), LWC350: 8380 gpm (1,900m³/hour).
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