This technical guide covers liquid-cooled rack design for AI data centers, including manifold architecture, quick-disconnect (QD) fittings, coolant distribution, and integration with facility chilled water systems. Engineers will learn practical design considerations for supporting GPU-dense servers exceeding 100kW per rack while maintaining serviceability and leak protection requirements.
A liquid-cooled AI rack uses supply and return manifolds and quick-disconnect fittings to deliver coolant from a CDU to each server’s cold plates, with flow balanced across nodes. ToneCooling supplies standard GB300 4G+2C, GB200, H200 and H100 cold plate kits for these racks.
Overview
This technical guide covers liquid-cooled rack design for AI data centers, including manifold architecture, quick-disconnect (QD) fittings, coolant distribution, and integration with facility chilled water systems. Engineers will learn practical design considerations for supporting GPU-dense servers exceeding 100kW per rack while maintaining serviceability and leak protection requirements.
For industry standards and best practices, refer to ASHRAE.
Frequently Asked Questions
What is a liquid-cooled server rack?
A rack with supply and return manifolds that deliver coolant from a CDU to the cold plates in each server through quick-disconnect fittings.
How are cold plates connected in an AI server rack?
Each server’s cold plates connect to the rack manifolds through hoses and quick disconnects, so trays can be removed without draining the loop.
How is flow balanced across a liquid-cooled rack?
By sizing manifolds and branches so each server sees similar pressure drop, and by checking flow per node during commissioning.
Which AI server cold plates does ToneCooling supply for racks?
Standard GB300 4G+2C, GB200, H200 and H100 cold plate kits supplied to published datasheets, plus custom cold plates for other platforms.
Get a Custom Thermal Solution from ToneCooling
ToneCooling is a professional liquid cooling solution provider specializing in custom cold plates, AIO coolers, and advanced thermal management systems. With ISO 9001 quality management and our own manufacturing facility in Huizhou, China, we deliver prototype samples typically within 4–6 weeks. Contact ToneCooling today for a free consultation and quote. An engineer reviews every RFQ and replies by email with next steps.
About ToneCooling
ToneCooling is a professional OEM manufacturer specializing in custom liquid cooling solutions, cold plates, and thermal management systems. Founded in 2004 serving global OEM customers, we deliver high-performance cooling solutions for servers, data centers, electric vehicles, energy storage systems, and industrial applications. Our engineering team provides end-to-end support from thermal simulation and design optimization to prototype development and mass production. All products are manufactured in our own facility in Huizhou, China, under ISO 9001 quality management with rigorous quality control. Contact ToneCooling for custom cooling solutions tailored to your project requirements.
Why Choose ToneCooling for Liquid cooled rack
ToneCooling provides professional liquid cooled rack solutions with custom designs, engineering review and prototype samples. Our liquid cooled rack products serve data center, EV, industrial, and semiconductor applications worldwide.
Contact ToneCooling for custom liquid cooled rack solutions. Visit tonecooling.com or email info@tonecooling.com. US: +1 (832) 720-7542. An engineer reviews every RFQ and replies by email with next steps.
Industry References & Standards
Why Choose ToneCooling for Cold Plate Manifold Flow Balancing
Engineering review and prototype planning are based on the project requirements. Custom prototype lead time is normally 4–6 weeks after drawing approval and order confirmation; confirm the production schedule in the quotation.
Building AI servers? See our standard GB300 4G+2C cold plate kit and GB200 cold plate kit, both supplied to published datasheets.
Need a Custom Liquid Cold Plate?
ToneCooling engineers review your drawings and requirements and reply by email with next steps.
Why Choose ToneCooling for Liquid Cooled Rack Design AI?
ToneCooling is a liquid cold plate and AIO cooler manufacturer serving AI server, EV battery, and power electronics applications. Our liquid cooled rack design ai solutions use copper T2 construction, transient liquid phase diffusion welding, and CFD-validated thermal design. Every unit passes 100% helium leak inspection and 6-hour nitrogen pressure hold testing before shipment.
Contact our thermal engineering team at info@tonecooling.com with your system layout and TDP requirements. → Request a quote
Last updated: 2026-10-02
Frequently Asked Questions
What manifold design supports 100kW+ liquid-cooled racks?
High-density racks exceeding 100kW require supply and return manifolds sized for 40-80 LPM total coolant flow, with individual server connections using non-spill quick-disconnect (QD) fittings rated for the system pressure. Manifold design must include isolation valves per server for hot-swap serviceability and leak detection sensors at each connection point.
What quick-disconnect fittings are used in liquid-cooled server racks?
Data center liquid cooling uses non-spill (dripless) quick-disconnect fittings that seal automatically when disconnected, preventing coolant release during server hot-swap. Common specifications include 3/8 inch or 1/2 inch flow paths rated to 150 PSI, with materials compatible with propylene glycol-water coolant.
How does ToneCooling support liquid-cooled rack deployments?
ToneCooling provides server-level cold plates for GPU and CPU cooling, rack manifold assemblies with integrated QD fittings and leak detection, and CDU solutions for facility-level coolant management. Our engineering team supports system-level thermal architecture, CFD simulation, prototype validation, and volume production for hyperscale data centers.
