Conventional air path
Heat moves from chips to heatsinks, then into room air. The room cooling system removes that heat from the data hall.
- Airflow and aisle discipline matter most.
- Liquid interfaces are not part of the rack hardware.
Direct-to-Chip Liquid Cooling Piping & Manifold Fabrication
Cold-Plate Liquid Cooling
Direct-to-chip liquid cooling removes heat at the processor level. Reliable deployment still depends on a clearly defined path across the CDU, prefabricated piping, rack manifolds, hoses, quick disconnects, cold plates, testing, and service access.
How Direct-to-Chip Cooling Works
Chip heat moves into a liquid loop.
Cold plates move chip heat into the technology cooling loop. The CDU keeps that loop separated from the facility water side while transferring heat through its exchanger.
What Changes in the Rack
Air path vs liquid path.
Air cooling moves heated room air. Cold-plate liquid cooling moves heat through coolant, fittings, hoses, and manifolds. Clear interface data makes the hardware easier to build and test.
Cold-plate liquid path
Cold plates capture processor heat and transfer it into coolant. Manifolds, hoses, and QDs bring that flow path to a serviceable rack interface.
- Interfaces, pressure, coolant, and test method must be defined.
- Routing, labeling, and service clearance need early confirmation.
Rack Manifold Environment
Rack-level fluid interface.
A rack interface is not only a manifold. Port order, hose bend radius, QD access, supply/return marking, and bracket positions all affect service work after installation.
The interface has to be buildable and serviceable.
After the CDU and cold plates are selected, the rack manifold package still needs practical routing, protected connections, clear labels, and enough room for technicians to work.
- Match port sequence to the server service logic.
- Supply and return connections need clear color and position discipline.
- Confirm hose length, bend radius, and QD access before quotation.
CDU-Side Interface
Prefabricated piping connects the CDU to the rack row.
The CDU is normally selected by the customer or system integrator; Chelsey does not claim CDU manufacturing here. Chelsey fabricates the stainless piping, valves, and connection modules between CDU outlets and the row or rack manifold interface.
Interfaces Flanges, clamp fittings, threaded ports, QDs, and customer-specified valves.
Fabrication Cutting, fit-up, TIG welding, brackets, orientation marks, and port labels.
Verification Pressure hold, leak checks, cleaning, drying, and protected packing per customer protocol.
Project requirements may include general tolerances, geometric tolerances, weld appearance, 1.6 MPa pressure hold, internal cleanliness, and dry delivery. Final acceptance follows the drawings, BOM, and test protocol supplied by the customer.
Buildability Details
Small interfaces carry large risk.
Liquid cooling problems often start in details: seal type, weld access, cleanliness level, test-port position, and packing protection. Confirming them early makes fabrication and delivery more predictable.
Coolant path Fluid cleanliness, corrosion control, pressure class, and temperature range.
Manifolds Port count, spacing, branch direction, brackets, and service clearance.
Connections QD type, thread/flange/clamp standard, sealing method, and hose bend radius.
Testing Pressure hold, leak checks, cleaning, drying, labeling, and protected packing.
Chelsey Fabrication Role
From confirmed design to fabricated hardware.
The customer defines the cooling system. Chelsey turns confirmed interfaces into manufacturable stainless flow-path hardware.
Chelsey does not define the full liquid cooling system, CDU, cold plates, controls, commissioning, or final system acceptance. Chelsey fabricates the confirmed flow-path hardware from customer drawings, BOMs, samples, or interface notes.
FAQ
Short answers only.
Is this the same as cold-plate liquid cooling?
Yes. Here, direct-to-chip liquid cooling means cold plates transfer processor and accelerator heat into the TCS loop. It is commonly grouped under Direct Liquid Cooling (DLC).
What does Chelsey need before quoting?
Send drawings or layouts, BOM, interface dimensions, material and connection standards, coolant medium, pressure and temperature requirements, quantity, customer test protocol, labeling rules, packing method, and destination.
Can Chelsey design the complete cooling system?
No. Customers or system integrators define the architecture, CDU, cold plates, controls, flow and pressure targets, coolant requirements, and acceptance criteria. Chelsey fabricates the confirmed piping, manifolds, and connection hardware.
Send the drawings.We review the build.
Share pipe size, material, pressure, interface type, quantity, fluid medium, customer test protocol, and packing destination for a focused fabrication review.
Drawing / layoutPipe sizeMaterial gradeDesign pressureInterface typeValve requirementTest pressureQuantity
