Why do stainless-steel plate heat exchangers become indispensable for CDU liquid-cooling systems?
With the rapid expansion of global AI computing infrastructure in late-2026, overseas orders for high-density data-center projects are growing sharply. As the core component inside CDU (Cooling Distribution Unit), the stainless-steel plate heat exchanger faces rising global demand. Well-known international brands including Alfa Laval and SWEP invest heavily in developing plate sheets specially designed for liquid-cooling conditions. Meanwhile, Chinese-made heat-exchange products gradually break long-term overseas monopolies and gain popularity across Southeast Asian and Middle-Eastern computing-power projects.
Strict material requirements for CDU liquid-cooling systems are the primary reason for stainless-steel plates’ widespread adoption. Inside the cooling loop, circulating fluids such as ethylene-glycol mixed-water and de-ionized water have special requirements for plate-sheet purity and anti-corrosion performance. Ordinary copper-made plates suffer from pitting corrosion when exposed to trace chloride ions. Aluminum materials are prone to electrochemical oxidation, which may cause fluid leakage and damage expensive GPU chips. By contrast, electrolytic-polished 316L stainless-steel plates form a dense chromium-oxide passivation film. Its low-precipitation surface prevents tiny particles from blocking narrow flow-passages and ensures long-term stable operation for 15-20 years. For coastal data-centers with higher chloride-ion levels, duplex stainless-steel 2205 plates further improve anti-corrosion performance.
Matching high-quality PHE gaskets is another decisive factor for reliable CDU operation. Liquid-cooling systems undergo frequent temperature fluctuations from continuous start-stop cycles. Conventional sealing materials will swell, harden or crack after long-time contact with glycol-based coolants. Modified EPDM gaskets selected for data-center projects resist medium-induced aging within-57℃-150℃ and avoid fluid short-circuiting inside CDU equipment. Our self-developed gaskets pass long-term immersion tests and fully comply with international data-center fluid-compatibility standards.
Structural advantages make plate-and-frame heat exchangers perfectly fit compact CDU layout requirements. Chevron-ripple plate-sheet design creates strong turbulent flow, delivering heat-transfer efficiency 3-5 times higher than traditional shell-and-tube heat exchangers. The compact structure greatly cuts overall CDU dimensions to fit limited internal cabinet space. Our R&D team optimizes asymmetric flow-channel structures to balance high heat-transfer efficiency and reasonable pressure drop, lowering pump power consumption and helping data-center operators reduce PUE values.
In the past decade, European manufacturers dominated the liquid-cooling heat-exchange market. Nowadays, local Chinese manufacturers take full advantage of high-quality domestic stainless-steel supplies from Taiyuan Iron & Steel and independent gasket-formula development. We provide customized plate-sheet designs and full-set PHE solutions rather than just generic products. Our products have obtained CE and PED certificates to meet strict standards of overseas computing-power projects.
Conclusion
Stainless-steel plate heat exchangers win their critical position in CDU liquid-cooling systems by reliable plate-sheet materials, matched high-performance gaskets and optimized structural design. Instead of relying on foreign-brand products only, global buyers now turn to qualified Chinese suppliers for cost-effective and customized heat-exchange solutions. Our technical team offers plate-selection advice, parameter calculation and after-sales support for global AI-data-center clients.