Liquid Cooling · High-Density AI

Liquid Cooling for
AI Server Racks

When a rack goes past ~20–30 kW, air stops being enough. We supply the liquid-cooling hardware that goes with high-density compute build-outs: rack cabinets, in-rack CDUs, cold plates, manifolds and quick disconnects — plus immersion tanks for single- and two-phase deployments.

Cold plate / D2CImmersionCDU{40}

What we supply

Six building blocks — mix and match per rack, per site

Liquid-Cooled Rack Cabinet Cabinet

A server cabinet designed for direct-to-chip cooling: the coolant loop, rack manifold and drip-free connections are integrated into the rack, so the row is ready before the nodes arrive. Front-door, side-panel and rear-door heat-exchanger variants are available for retrofit situations where the CPU/GPU are still air-cooled.

42U / 48U, 600 × 1200 mm class
Integrated rack manifold + drip tray
Blind-mate connections for hot-swap nodes
Rear-door heat exchanger retrofit option
Leak-sensor rope pre-installed

Typical pairing: cold plate nodes + in-rack CDU

In-Rack CDU CDU

The unit that separates the facility water loop from the server loop. Sits inside the rack (4U–6U class) and delivers filtered, temperature- and flow-controlled coolant to the cold plates. Redundant pumps and N+1 power keep a single failure from taking the rack down.

4U / 6U in-rack form factor
Roughly 60 kW – 250 kW class per unit
Redundant pumps, N+1 PSU
Facility-side and IT-side isolation
Flow, ΔP, temperature and leak telemetry

Ask for: capacity · primary/secondary ΔT · pump redundancy

Cold Plates D2C

Copper microchannel cold plates that sit directly on the CPU/GPU package. Custom cold plates can be tooled for a specific board and mounting pattern, so the mechanical fit and thermal interface are right the first time.

Copper / nickel-plated, microchannel
CPU, GPU and memory (DIMM) plates
Custom mounting + TIM per board
Pressure-tested, low-flow-resistance designs
Samples before volume tooling

Send us: board model · socket/keep-out drawing · target TDP

Manifolds & Quick Disconnects Loop

What makes a liquid rack serviceable: a supply/return manifold with blind-mate, drip-free couplings so a node can be pulled without draining the loop. Valve-in-coupling designs mean the drips stop at the connector, not on the floor.

Rack manifold, supply + return, 1"–2" class
Blind-mate quick disconnects (QD)
Flush-face / non-spill, valved
Flexible hoses, stainless and EPDM options
Flow-balanced port spacing per rack

Leak-free serviceability is the point — valved QDs

Immersion Cooling Tanks Immersion

For the highest densities, the whole node goes into dielectric fluid instead of onto a cold plate. Single-phase uses pumped dielectric and a heat exchanger; two-phase boils the fluid and condenses it above the server, which removes far more heat per litre of fluid.

Single-phase (pumped dielectric + HX)
Two-phase (boiling/condensing, phase-change)
Tank, lid, lifting jig, drip tray, cabling
Immersion-ready PSU and cabling options
Dielectric fluid supply and top-up

Better with: immersion-safe PSU · shorter cabling · fluid management

Leak Detection & Telemetry Safety

Liquid in a rack means you need to know about a leak before the customer does. Sensing rope along the drip tray, plus flow/ΔP/temperature reporting from the CDU, turns "did it leak?" into an alarm in the DCIM instead of a phone call.

Leak-sensing rope / spot sensors
CDU telemetry: flow, ΔP, ΔT, pump status
Dry-contact alarm to DCIM/BMS
Valve shut-off on alarm (optional)
Scheduled coolant sampling / treatment

Complete the loop: sensor + alarm + shut-off

Reference material

Manufacturers' own published pages and datasheets — useful when you are writing a spec or comparing options (external links)

Supermicro — 4U In-Rack CDURack-integrated CDU, compact 4U design for high-density liquid cooling Shenling — Liquid Cooling CDUChinese climate-control maker, liquid cooling CDU product line (EN site) JetCool — CDU / SmartPlate cold platesCDU datasheet + microconvective cold plate documentation Jindu — custom cold platesLiquid cold plate manufacturing, custom tooling Immersion Energy — custom CDU & immersionImmersion cooling solutions and CDU builds Envicool (英维克)Data-center thermal management: CDUs, cold plates, full liquid-cooling chains Sugon Digital / 曙光数创Immersion and phase-change liquid cooling for data centers Open Compute ProjectOCP liquid-cooling specs (cold plate, rack, CDU requirements)

Sizing a rack? — Tell us the rack power (kW), the node model, whether the coolant is facility water or a chiller loop, and your target supply temperature. We come back with the CDU capacity, manifold layout and cold-plate options. Leave a message →

Liquid Cooling forAI Server Racks