UQDGMP
Standard Quick Disconnect
For server lines, CDU branches, manifolds and test setups with frequent service access.
Data Center Fluid Connectors · Liquid Cooling
Data center fluid connectors: UQD quick disconnects for GPU trays, CDU lines and serviceable rack loops
UQD / UQDB / blind-mate / MQD liquid-cooling quick disconnects, from NVIDIA-qualified production – manufacturing partner listed as an NVIDIA supplier – a UQD-compliant second source to Stäubli and Parker. European supplier with samples, datasheets and engineering support.
In short
Netonx supplies UQD, UQDB, blind-mate (BMC/BLC/XBMC) and MQD liquid-cooling quick disconnects for data-center direct-to-chip cooling, CDU lines and GPU trays. Made in NVIDIA-qualified production (ISO class 7 cleanroom, 100% leak testing), they are leak-free (non-spill / dry-break) and rated for >5,000 mating cycles. UQD/UQDB follow the OCP UQD standard and are cross-vendor mate-compatible, making Netonx a qualified second source to Stäubli, Parker and CPC. UQD from €25/unit (<100 pcs); volume pricing on request.
What is a UQD (Universal Quick Disconnect)? A UQD is a standardized, leak-free quick-disconnect fluid coupling for data-center liquid cooling, defined under the Open Compute Project (OCP). It joins hoses to cold plate, manifold and rack and lets coolant lines be connected and separated quickly and drip-free, even under system pressure.
60+patents
ISO class 7CNAS cleanroom (10,000)
100 %full inspection
20+test procedures
OCP · MSAmember · NVIDIA-qualified
Core technology
Non-spill / dry-break: not a single drop on disconnect
Why are premium couplings like Stäubli expensive? The reason is their core non-spill (dry-break) disconnect technology. Cheap couplings release a few drops of coolant the moment they are pulled – inside multi-million-euro AI servers or high-voltage storage cabinets that can be fatal. Stäubli disconnects with "zero spill" and survives thousands of mating cycles – which is exactly why the industry (including giants like NVIDIA) is willing to pay the steep premium.
We master the very same technology: drip-free dry-break design, high cycle life and 100 % leak testing – as a qualified second source to Stäubli and Parker, at significantly better terms.
0 dropson disconnect (dry-break)
> 5,000mating cycles
100 %leak testing
Knowledge
What is a UQD quick disconnect?
UQD (Universal Quick Disconnect) is a standardized fluid connector for liquid cooling in data centers and high-performance computing. It connects hoses to cold plate, manifold and rack and provides a fast, safe and leak-free coolant connection via an automatic mechanism. UQD is a core component of the Open Compute Project (OCP), initiated by Intel and developed into an open standard. Even the smallest leak can take down a cooling system or damage expensive hardware – so the coupling's primary job is to keep coolant sealed in its flow path while allowing free flow.
Types
By mating: blind-mate (UQDB, automatic connection, for highly automated, frequently mated applications) and manual (locking via ball, pin, thread or latch).
By standard/use: UQD (open OCP standard, typically two pairs per server), UQDB (blind-mate for direct liquid cooling), threaded coupling (e.g. at the CDU).
By material: high-performance polymer (light, corrosion-resistant) or metal/stainless steel (high strength, temperature and pressure resistance).
How it works
An optimized internal channel delivers high flow at minimal pressure drop. Spring-driven or flat-face valves open automatically on mating and close instantly on separation.
The medium stays sealed on both sides when disconnected – no coolant spill, no air ingress, even under system pressure and in tight spaces.
Functions
- Quick connect: one-handed, tool-free – faster service, less downtime
- Drip-free (non-spill): reliable seal under operating pressure, zero external leakage
- Low residual spill on disconnect
- Low flow resistance for full cooling performance
- High durability (stainless steel, special seals)
Key parameters & selection
| Parameter | What it means for selection |
|---|---|
| Working & burst pressure | Safe operating pressure vs. failure limit – choose with safety margin |
| Flow & pressure drop | High flow at low pressure drop reduces pump load and raises efficiency |
| Leak rate | The gold standard of sealing – zero external leakage when connected |
| Temperature range | Seal and body must stay stable at min/max temperature |
| Contact resistance | For chip-near cooling, high contact resistance may be required to electrically isolate the loop |
| Media compatibility | All wetted parts must match the coolant (deionized water, water-glycol, fluorinated fluid) |
| Mating cycles (durability) | Quality couplings withstand several thousand to > 10,000 mating cycles |
| Space & blind-mate tolerance | Compact size; for blind-mate, axial/radial tolerance is decisive |
| Maintenance & TCO | Faster server swaps (minutes vs. hours) cut total cost of ownership |
UQD demand in AI racks (GB200 → GB300)
UQD demand grows with every GPU generation. An NVIDIA NVL72 rack of the GB200 class uses on the order of ~126 coupling pairs (18 compute trays + 9 switch trays). With the GB300 generation – an individual cold plate per chip – the count per compute tray rises further; market reports estimate ~250 pairs per NVL72 rack. At the same time the couplings get smaller (a new, more compact UQD generation), which raises the bar on manufacturing tolerance and sealing. Reference designs commonly use OCP-standard UQD from established makers (CPC, Stäubli, Parker). Full GB200/GB300 UQD demand analysis →
Netonx supplies UQD-compliant quick disconnects from NVIDIA-qualified manufacturing as an alternative / second source for AI data center liquid cooling – with a European point of contact. Request a quote →
Applications
Two domains: CPU/GPU direct cooling and CDU & ring network
Leak-free quick disconnects for liquid cooling – from chip-near server lines to CDU and ring-network distribution. Lower energy use and failure rates while overcoming environmental limits.
CPU / GPU
CPU/GPU direct cooling (D2C · servers & AI clusters)
Leak-free quick disconnects with high flow, easy mating, strong corrosion resistance and low weight – for data centers and servers: lower energy use, fewer failures, fast service.
Product lines:
- UQDGMP / UQDBGMP quick disconnects
- MDCGMP / MBDGMP leak-free couplings
- BLCGMP blind-mate (slide-in / GPU tray)
- Under-pressure (live-connect) couplings
CDU & ring net
CDU & ring network (distribution)
Large full-flow interlocking ball-valve couplings and large blind-mate couplings, purpose-built for CDU and ring-network applications: easy operation, large tolerance, low weight, simple installation.
Product lines:
- SFCGMP full-flow ball-valve coupling
- MTCGMP leak-free coupling
- Large blind-mate couplings
- PBSGMP / MBSGMP pressure-test couplings
Product Lines
Server-focused classification by installation position and service process
This is a technical pre-selection. Final SKU, drawing and price are confirmed after interface, sealing, pressure drop, fluid and sample validation.
BMCGMP
Blind-Mate for GPU Trays
For slide-in systems and blind-mate racks where mechanical tolerance needs to be absorbed.
BFCGMP
Fill and Supply Blind-Mate
For CDU filling and high-flow connection points with short mating travel.
SFCGMP
Full-Flow Ball Valve Coupling
For ring mains, main lines and CDU-near sections requiring high flow and robust isolation.
MTCGMP / MDCGMP
Manual Quick Disconnect
For maintenance, test benches and manual line disconnection in server environments.
MBDGMP
Compact Connector for Tight Spaces
For compact server housings, test adapters and restricted installation spaces.
BLCGMP
Dual-Float Blind-Mate
For dense rack geometries with smaller pitch and defined guidance.
XBMC02GMP
Micro Blind-Mate Pair
Real specification pair: M4x0.7 plug, M5x0.8 socket, EPDM, 303 stainless steel.
Project SKU
Custom Combination
When application, space or interface does not fit a standard family, a project sample is prepared.
Engineering Finder
Pre-selection by server application and technical boundary condition
This is not a final automatic SKU release. It is a clean inquiry and prequalification path.
Preliminary selection rule
No automatic price list is shown on the public page. Prices stay in the backend and are confirmed as EUR quotations after technical review.
Send inquiryEngineering Tool
Coolant flow & connector sizing calculator
Enter the cooling load to get the required coolant flow, a recommended nominal size (DN) with matching series, plus an estimated pressure drop and fluid velocity. Results are guidance (Richtwert); the final connector is confirmed after drawing, fluid and sample / pressure-drop validation.
–Required flow (total)
–Flow per connector
–Recommended size
–Est. Δp per connector
–Fluid velocity
Based on typical Kv values per DN for water/glycol. Δp ≈ (Q/Kv)². Guidance only – final selection after sample and pressure-drop validation.
Request exact selectionSelection Matrix
Find your quick-disconnect coupling
Filter by application, then compare series by nominal size, pressure, temperature and key feature. Leak-free, >5,000 mating cycles, cleanroom assembly, ISO 9001.
| Series | Type | Application | Nominal size | Pressure | Temperature | Key feature | Price < 100 pcs |
|---|---|---|---|---|---|---|---|
| MDCGMP | Manual drip-free QD | Data center / Semiconductor / Medical | DN04–DN25 | 20 bar | -40 … +120 °C | Low flow resistance, one-hand | E-mail for quote → |
| MTCGMP | Two-hand locking QD | Rail / Marine | DN05–DN17 | 20 bar | -40 … +120 °C | Anti-vibration, lightweight | E-mail for quote → |
| UQDGMP | OCP-standard QD | Data center | DN03–DN10 | 20 bar | -40 … +120 °C | OCP-compatible | from 25 € |
| MQDGMP | NVIDIA-spec QD | GPU server | DN03–DN05 | 6.9 bar | -40 … +120 °C | Ultra-compact | from 49 € |
| MBTGMP | High-flow QD | Energy storage / Supercharging | DN05–DN15 | 20 bar | -40 … +120 °C | High flow | E-mail for quote → |
| BLCGMP | Blind-mate | Rack / Radar | DN03–DN08 | 16 bar | -40 … +120 °C | ±0.5 mm float | E-mail for quote → |
| BRCGMP | Anti-contaminant blind-mate | Defense / Radar | DN03–DN05 | 20 bar | -40 … +80 °C | Particle-tolerant | E-mail for quote → |
| UQDBGMP | OCP blind-mate | Data center | DN03–DN10 | 20 bar | -40 … +120 °C | OCP blind-mate | E-mail for quote → |
| MQDBGMP | NVIDIA blind-mate | AI server | DN03–DN05 | 6.9 bar | -40 … +120 °C | Compact blind-mate | E-mail for quote → |
| BXCGMP | Pressure-relief blind-mate | Semiconductor / Radar | DN03–DN05 | 20 bar | -40 … +80 °C | Auto pressure relief | E-mail for quote → |
| BMCGMP | Large-tolerance blind-mate | OCP rack | DN05 / 10 | 20 bar | -15 … +90 °C | ±5 mm float | E-mail for quote → |
| BFCGMP | CDU refill blind-mate | CDU system | DN20 / 25 | 20 bar | -40 … +120 °C | High-flow refill | E-mail for quote → |
| SAFGMP | Two-phase QD | Two-phase cooling | DN06–DN09 | 40 bar | -15 … +125 °C | Refrigerant-resistant | E-mail for quote → |
| MBDGMP | Compact QD | Tight spaces | DN04 | 20 bar | -55 … +125 °C | Ultra-small footprint | E-mail for quote → |
| SLCGMP | Bayonet locking QD | Vehicle / Marine | DN03–DN08 | 20 bar | -40 … +120 °C | Bayonet, anti-vibration | E-mail for quote → |
| SFCGMP | Full-flow ball valve | CDU ring main | DN25–DN50 | 16 bar | -40 … +120 °C | Full-flow, interlocked | E-mail for quote → |
Prices = entry size, single units under 100 pcs, net plus VAT. From 100 pcs: e-mail for a tiered quote. Body materials 316L / aluminium / 304 SS · seals EPDM, FKM, FVMQ, NBR, HNBR (per medium & temperature). Final specification & EUR quotation after technical review.
Cross-Reference Table
Stäubli & Parker → Netonx (GMP): a buyer's cross-reference
How our GMP series map to the common quick disconnects from Stäubli and Parker. UQD/UQDB follow the OCP standard and are cross-vendor mate-compatible; proprietary blind-mate series are functional equivalents.
| Function / application | Standard / size | Stäubli | Parker | Netonx (GMP) | Price < 100 pcs |
|---|---|---|---|---|---|
| Universal Quick Disconnect (server, CDU) | OCP UQD · DN03–DN10 | UQD | UQD | UQDGMP | from 25 € |
| Blind-mate (GPU tray / blade) | OCP UQDB | UQDB | UQDB | BMCGMP / MBDGMP | on request |
| Self-aligning blind-mate (tolerance comp.) | proprietary | CGO / CGD | UQDB | BLCGMP | on request |
| Blind-mate fill / high flow (CDU) | large-bore | CGO / CGD | UQDB | BFCGMP | on request |
| Full-flow ball valve (ring main / trunk) | large-bore | — | — | SFCGMP / MTCGMP | on request |
| NVIDIA-spec QD (GPU server) | NVIDIA MQD | — | UQDB (NPN) | MQDGMP | from 49 € |
| Pressure-test coupling | — | — | — | PBSGMP / MBSGMP | on request |
Check cross-reference & request samples See all unit prices
"From" prices = smallest size in the series, single-unit purchase under 100 pcs, net plus VAT. Full price tiers per size: see unit prices; further series on request.
Stäubli (UQD, UQDB, CGO, CGD) and Parker (UQD, UQDB) are trademarks of their respective owners; Netonx Europe / Green MeOH has no business relationship with these companies. UQD/UQDB follow the OCP standard and are cross-vendor compatible. Proprietary series are functional equivalents; final compatibility (dimensions, seal, pressure, medium) is confirmed by specification and sample. Cross-reference for purchasing guidance.
List prices
Per-unit prices · Liquid Connectors (single units < 100 pcs)
Per-unit prices, net excl. VAT, for small quantities under 100 pcs – ex stock. From 100 pcs, volume pricing applies – please request by e-mail.
| Series / size | Plug | Socket | from 100 pcs |
|---|---|---|---|
| UQD02 | €25 | €41 | on request |
| UQD04 | €26 | €47 | on request |
| UQD06 | €35 | €63 | on request |
| UQD08 | €38 | €99 | on request |
| MQD04 | €49 | €77 | on request |
Request quantities from 100 pcs
List prices in EUR, net excl. VAT, as of 06/2026, subject to change. Final price depends on version (thread, hose barb, colour), quantity and medium; confirmed by quotation. Further series (BMC, BFC, SFC, MTC/MDC etc.) on request.
Alternative & second source
UQD-compliant quick disconnects as an alternative to Stäubli and Parker
Many data-center and CDU manufacturers regard Stäubli and Parker as the reference for liquid-cooling quick disconnects. If you are looking for a second, deliverable source or want to optimize cost and lead times, Netonx Europe offers UQD/UQDB, blind-mate and MQD couplings that follow the UQD standard – leak-free, with over 5,000 mating cycles and cleanroom assembly. As a European supplier with a direct contact, we deliver samples, datasheets and project volumes.
Frequently asked questions
Is there an alternative or second source to Stäubli or Parker liquid-cooling couplings?
Yes. Our UQD/UQDB, blind-mate and MQD quick disconnects follow the UQD standard and are suitable as an alternative or second source for AI servers, GPU trays and CDU lines – with a European supplier and contact.
Are the couplings compatible with the UQD standard?
Our couplings are designed to the UQD standard. Dimensions, flow and connection variants are matched to your specification; samples for evaluation are available.
Can I get samples and datasheets for qualification?
Yes. We provide datasheets and samples for your internal qualification and support you with sizing, flow and mating-cycle requirements.
Guide: UQD vs. proprietary quick disconnects – selection guide for data-center liquid cooling → · NVIDIA GB200/GB300 UQD demand → · Test report SFC (DN50) → · UQD connectors explained → · UQD per NVL72 rack →
Stäubli, Parker and NVIDIA are trademarks of their respective owners. Netonx Europe / Green MeOH has no business relationship with Stäubli, Parker or NVIDIA. The reference to NVIDIA-qualified production refers to the qualification of our manufacturing partner (listed as an NVIDIA supplier); it is stated for objective comparison and to indicate compatibility with the UQD standard.