What Danfoss makes for data centers
private · HQ Nordborg, Denmark · danfoss.com
Ownership: foundation/family-controlled (Bitten & Mads Clausen's Foundation)
Danfoss makes quick-disconnect couplings for data-center liquid cooling (UQD, UQDB blind-mate, and OCP ORV3 connectors), valve trains for hydronic balancing, and coolant hoses, and supplies Turbocor oil-free centrifugal compressors used in data-center chillers. The company is controlled by the Bitten & Mads Clausen's Foundation and the Clausen family; the Semikron Danfoss power-semiconductor business is a separate joint venture.
Parts, by layer
Layer 5 — Liquid cooling (IT-side: chip to CDU)
| Part | Role | Confidence | Competitors | Note |
|---|---|---|---|---|
| Quick disconnects | manufacturer | disclosed | Eaton, Fositek, Parker Hannifin, CPC/Colder, Stäubli, Swagelok | |
| Hoses, tubing, fittings, valves | manufacturer | inferred | Belimo, Continental, Eaton, Emerson, Gates, IMI | |
| CDU internals: plate heat exchangers, pumps, filters | manufacturer | disclosed | Alfa Laval, Kaori, Kelvion, SWEP |
Layer 6 — Facility cooling & HVAC
| Part | Role | Confidence | Competitors | Note |
|---|---|---|---|---|
| Heat reuse & district heating interfaces | manufacturer | disclosed | Alfa Laval, Carrier, Fortum, Siemens Energy, Trane, Everllence | |
| Compressors | manufacturer | inferred | Daikin, Mitsubishi Heavy Industries, Bitzer, Copeland | Turbocor |
| Valves and actuators | manufacturer | inferred | Belimo, Crane, Emerson, Honeywell, Johnson Controls, Mueller | |
| Plate HX | manufacturer | inferred | Alfa Laval, Kelvion, SWEP |
Where Danfoss sits in the stack
Danfoss's placements in this catalog cover 7 parts, from layer 5 (liquid cooling (it-side: chip to cdu)) to layer 6 (facility cooling & hvac). None of them currently carries a sourced supply constraint tag. Across these parts it overlaps with other companies most often on the lines below.
What these parts are
- Quick disconnects — Blind-mate connectors (UQD or UQDB) that let a compute tray or cold plate be connected to or disconnected from the coolant manifold without draining or spilling the loop.
- Hoses, tubing, fittings, valves — The flexible hoses, rigid tubing, compression and push-fit fittings, and shutoff or balancing valves that carry coolant between manifolds, quick disconnects, and the CDU.
- CDU internals: plate heat exchangers, pumps, filters — The internal components of a CDU — plate heat exchangers, pumps, and filters — that do the actual heat exchange, circulation, and particulate control inside the unit.
- Compressors — The core rotating component inside a chiller — centrifugal, screw, scroll, or magnetic-bearing (turbocor-type) — that drives the vapor-compression refrigeration cycle.
- Valves and actuators — Valves and actuators that modulate and isolate flow within the facility water loop, including zone-isolation valves that take a section offline without stopping the whole loop.
- and 2 more in the table above.
Closest peers in this catalog
Seen in real machines
Danfoss is named in 1 of the rack teardowns and supercomputer breakdowns on this site. Each line below is a piece of that machine.
- Nvidia GB300 NVL72 · rack teardown
- Quick disconnects
- Hoses and fittings
Questions about Danfoss
- What does Danfoss make for AI data centers?
- This catalog places Danfoss on 7 parts: Quick disconnects (manufacturer), Hoses, tubing, fittings, valves (manufacturer), CDU internals: plate heat exchangers, pumps, filters (manufacturer), Heat reuse & district heating interfaces (manufacturer), Compressors (manufacturer), Valves and actuators (manufacturer) and Plate HX (manufacturer).
- Is Danfoss publicly traded?
- No listing is on file for Danfoss in this catalog; it is recorded as private.
- Where is Danfoss based?
- Nordborg, Denmark, per the company record in this catalog.
- Who else makes quick disconnects for AI data centers?
- Eaton, Fositek, Parker Hannifin, CPC/Colder, Stäubli and Swagelok are also placed on Quick disconnects in this catalog.
- How well sourced are these placements?
- Every part→company placement carries a confidence tag. For Danfoss the mix is 3 disclosed and 4 inferred. "disclosed" means the company or a filing says so; "reported" comes from trade press or a reference-design list; "inferred" is a lead from the taxonomy with no citation yet. Treat reported and inferred as leads, not facts.
Answers are generated from this catalog's own rows — see sources & method.
Verification: enriched, last verified 2026-08-27. Sources: www.danfoss.com · www.danfoss.com.· Markdown · JSON