API Energy Semi-Welded Plate and Frame Heat Exchanger(SWPHE)


Product description

API Energy Semi-Welded Plate Heat Exchangers are used for safety and corrosive media (i.e including ammonia refrigeration, CFCs, HCFCs, and aggressive process fluids. Resistant to stress and leakage), where two individual plates are laser welded together to create gas-tight modules for the “plate pack”. Only two ring gaskets fitted between two welded modules are in contact with the aggressive media. The modules are mounted between a fixed and movable pressure plate compressed by tightening bolts. This heat exchanger is ideal to be used for special process conditions, in particular aggressive media.

The advantage of this construction is that, one side of the cassette is a sealed welded channel, whilst the other is a traditional gasketted plate channel (i.e isolate refrigerant or process fluids from the gasketing). Making assembly and cleaning of this site easier.


  • Laser welded plates
  • Safe operation without leaking
  • High working pressure
  • Can be used for evaporators and condensers
  • Suitable for NH3
  • Minor gasket area
  • Small liquid volume


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