Food-Grade Plate Heat Exchanger
Food-grade plate heat exchangers are specialized hygienic heat transfer equipment engineered for food, beverage, dairy and other sanitation-critical manufacturing sectors. Centered on corrugated metal plates as core heat transfer components, these units deliver high-efficiency heat exchange between hot and cold fluids through narrow flow channels formed between plates, supporting core production processes including material heating, cooling, pasteurization and temperature holding.
Unlike standard industrial plate heat exchangers, this sanitary series features full hygienic construction. Every detail from material selection and flow channel geometry to gasket solutions complies strictly with global food-contact safety criteria such as FDA, 3-A and FCM certifications, eliminating cross-contamination risks for raw materials while balancing superior thermal performance and product quality retention. Selected wide-flow-channel variants are available to process pulp- and fiber-containing beverages without clogging.
Key Features
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Premium Hygienic & Safe Construction: Heat transfer plates are primarily fabricated from corrosion-resistant 316L stainless steel or titanium alloy with surface roughness Ra ≤ 0.8 μm, eliminating dead zones where residue could accumulate. All sealing gaskets are manufactured from FDA-approved elastomers including NBR, EPDM and VITON.
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Gentle & High-Efficiency Heat Transfer: Uniform flow channel layout eliminates localized overheating or undercooling zones, minimizing nutrient loss and flavor degradation of heat-sensitive materials such as milk and fruit juice. Perfectly matched for pasteurization, UHT sterilization and other low-impact thermal processes.
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Modular Design for Easy Maintenance: Bolted assembly (no permanent welding) allows flexible adjustment of heat exchange area by adding or removing plates, or reconfiguring plate arrangements to fit variable process conditions. Full disassembly enables thorough mechanical cleaning to reduce fouling buildup and extend continuous production runtime.
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Energy-Saving & Stable Operation: Counter-flow and parallel-flow configurations maximize logarithmic mean temperature difference with negligible heat loss, removing the need for extra thermal insulation. Pressure drop is only one-third of shell-and-tube heat exchangers. When integrated with waste heat recovery cycles (e.g., using hot sterilized dairy streams to pre-cool incoming raw milk), thermal efficiency exceeds 90%.
Technical Specifications
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Plate Materials: Standard 316 / 316L stainless steel; premium options include titanium, titanium-palladium alloy, Hastelloy C276 and 254SMO
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Gasket Materials: NBR, EPDM, HNBR, HT-NBR, VITON/FKM for full compatibility with diverse food media
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Frame Material: Solid stainless steel or clad stainless steel, fully hygienic compliant
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Maximum Design Pressure: 25 bar
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Design Temperature: ≤ 180℃
Application Industries
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Dairy Industry: Ideal for pasteurization, UHT sterilization, post-process cooling and temperature holding of milk, yogurt and cheese. Multi-stage heat recovery cycles drastically cut energy consumption while preventing milk protein denaturation and nutrient loss, meeting the strict sanitation benchmarks of dairy manufacturing.
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Beverage Production: Suited for fruit juice, tea drinks, carbonated beverages and beer processing: cooling freshly squeezed juice from 30–40°C down to 5–10°C, heating and diluting concentrated syrups, cooling syrup to 4–6°C for stable carbonation, wort cooling and beer pasteurization.
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Food Additive & Edible Oil Processing: Handles heating of viscous media like syrups and honey to lower viscosity for smooth pumping, plus post-processing cooling for convenient storage. Accelerates cooling of refined edible oils to reduce oxidation and rancidity, locking in long-term product stability.
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Other Sanitary-Grade Applications: Widely adopted for temperature control in household care and cosmetic raw material production, meeting strict high-cleanliness and food-contact safety requirements.