Double-Wall Heat Exchangers

Double-wall plate heat exchangers feature a specialized design developed to ensure maximum safety between two fluids.

In this system, a double-plate barrier separates the fluids instead of a single plate.

Thanks to this configuration, the fluids do not mix in the event of potential plate damage; instead, any leakage is directed to the external environment, allowing for early detection by the operator.

This safeguards both process safety and product quality.

Technical Specifications

Double-wall heat exchangers combine a safety-focused design with high-performance heat transfer characteristics:

  • Double-plate (double-barrier) construction for maximum isolation
  • Externally directed leak path for early leak detection
  • High heat transfer coefficient (U-value)
  • Low risk of leakage and enhanced process safety

Technical Specifications

  • Compact and modular design
  • Easy maintenance and plate replacement
  • Hygienic design (CIP / SIP compatible)

Typical Design Parameters:

  • Design Pressure: 10–25 bar (depending on the application)
  • Design Temperature: 0°C to 180°C

Design & Material

Materials used in double-wall heat exchangers are selected according to the hygiene and corrosion resistance requirements of the process.

Plate Materials:

  • AISI 316L → Hygienic and general process applications
  • AISI 304 → Standard applications
  • Titanium → High-chloride and seawater environments
  • Special alloys → Processes requiring advanced chemical resistance

Gasket Materials:

  • EPDM → Food processing and hot water applications
  • NBR → Oil and hydrocarbon-based fluids
  • FKM (Viton) → High-temperature and chemically aggressive applications

Design Features:

  • Controlled leak detection channel between the double plates
  • Hygienic surface design
  • CIP (Clean-in-Place) and SIP (Sterilization-in-Place) compatible
  • Uniform flow distribution with optimized plate geometry

Application Areas

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