UQD · Data Center & HPC
Engineering team responds within 24h
Data Center · HPC · AI Rack Infrastructure

OCP-compliant UQD couplings for liquid-cooled infrastructure.

No-spill by design. Interoperable across multi-vendor environments. Official Nvidia supplier per OCP requirements. Manufactured by Refas Group, with over 40 years of precision mechanical engineering.

Standard
OCP UQD
Spill-free
Yes · both sides
Supplier
Nvidia OCP-qualified
Prototype
30 business days
OCP Compliant
UQD Standard Program
nV.
Nvidia Official Supplier
Per OCP requirements
Hot-Swap Ready
No system drain required
30-Day Prototype
Spec to working sample
Key Performance

The numbers behind
every connection.

Three parameters define reliable UQD performance in data center environments. Our product is engineered to meet each one.
No-spill on disconnect
0 ml
Zero coolant loss on release
Both male and female sides seal simultaneously. No residual drip, no spray. Critical for hot-swap maintenance in live rack environments.
OCP Requirement Both sides
Multi-vendor interoperability
100 %
Drop-in compatibility, OCP-certified
Works across server racks, CDUs and manifolds from multiple manufacturers in the same loop. No proprietary lock-in. No vendor risk.
OCP UQD UQDB No lock-in
System downtime on swap
0 s
Hot-swap without draining
Designed for scheduled CDU maintenance cycles and unplanned module replacements in AI rack and HPC cluster environments.
Hot-swap No drain AI rack ready
OCP Compliance

What OCP compliance means for your infrastructure.

The Open Compute Project UQD standard defines universal specifications for quick disconnect couplings in single-phase liquid cooling loops. Compliance means your couplings are interchangeable across all OCP-certified hardware — no vendor lock-in, no compatibility risk.

Quick Couplr UQD connectors are manufactured to full OCP UQD specification. Our group holds official Nvidia supplier status per OCP requirements. Compliance documentation available on request.

Full OCP UQD Standard

Manufactured to full OCP UQD specification. Drop-in compatible with all OCP-certified server and CDU configurations.

01

Multi-Vendor Ecosystem

Validated in Nvidia ecosystem deployments. Compatible with hardware from multiple OCP-certified manufacturers in the same cooling loop.

02

No-Spill on Both Sides

Zero coolant loss on disconnect. Critical for hot-swap maintenance in live rack environments without system drain.

03

Hot-Swap Ready

Designed for scheduled CDU maintenance and module replacement cycles in AI rack and HPC cluster environments.

04
Technical Specifications

OCP-Compliant UQD —
full specs.

Complete dimensional drawings, CAD references and compliance documentation available in the downloadable datasheet.
A1
Geometry and Connection
Standard OCP UQD
Connection Hand-mate · Blind-mate (UQDB)
Body material AISI 304 stainless steel
Seals FKM
A2
Hydraulic Performance
Fluid Water / Water-Glycol
Spill-free Yes — both sides
Working pressure 6,9 bar
Operating temp. -4° ÷ +212°F (-20° ÷ +100°C)
A3
Types
OCP UQD Standard hand-mate — liquid cooling loops on server / HPC
OCP UQDB Blind-mate — panel connections, hot-swap HPC modules

Both types available with identical lead times and flexible production volumes.

A4
Maintenance & Safety
  • Hot-swap without system drain
  • No-spill on disconnect — both sides
  • Designed for scheduled CDU maintenance cycles
  • Compliant with OCP hot-swap guidelines
A5
Materials
Body material To be confirmed
Seal material To be confirmed

Material selection optimised for single-phase water/glycol cooling loops in server rack environments.

A6
Marking & Compliance
Standard OCP UQD Compliant
Supplier status Nvidia Official Supplier, per OCP requirements
Operating life To be confirmed
Origin Refas Group S.p.A.

Download the full datasheet

Complete specs, dimensions, CAD references and compliance documentation.

Materials and Parameters

What it is made of.

A universal protocol certified by Refas Group for functional reliability and thermal efficiency in liquid cooling environments. Every material and parameter is selected to meet OCP UQD requirements across multi-vendor infrastructure.

Material Architecture

AISI 304 stainless steel
Body — standard spec
Brass / CuZn
Body — cost variant
EPDM
Seal — water / glycol
FKM
Seal — high temp
Aluminium
Body — lightweight
PVDF
Body — corrosion res.

// Exact specification confirmed prior to go-live

OCP UQD Operating Parameters

Fluid type Water / Water-Glycol
Standard OCP UQD
Connection types Hand + Blind-mate
Spill-free Yes · both sides
Working pressure 6,9 bar
Operating temp. -4° ÷ +212°F (-20° ÷ +100°C)
Who We Supply

Direct supply to every node
of the data center chain.

Quick Couplr UQD couplings are supplied directly to manufacturers, integrators, distributors and operators across the liquid cooling infrastructure ecosystem.
01 / Builders
Data Center Builders & Operators
Hyperscale and colocation companies specifying liquid cooling components for AI-dense and HPC rack deployments. Direct procurement and AVL qualification.
Engagement Direct supply
02 / Integrators
System Integrators
Engineering companies designing and delivering turnkey liquid cooling solutions for data center clients. We supply OCP-compliant UQD components for BOM integration.
Engagement BOM supply · Custom configs
03 / Distribution
Distributors & Resellers
Authorised channel partners covering data center regions in North America, Europe and APAC. Stock holding programs and volume agreements available.
Engagement Channel partnership
04 / Operators
HPC & AI Operators
Research, financial and AI infrastructure operators running their own liquid-cooled compute. Maintenance-cycle supply and rapid replacement availability.
Engagement MRO supply
Talk to engineering

Tell us about your
cooling challenge.

Our engineering team responds within 24 hours.

  • OCP UQD compliance documentation on request
  • Nvidia supplier reference available under NDA
  • Direct line to precision mechanical engineers
  • 30 business days to working prototype
UQD inquiry · Form B
Interest
Reply within 24h

Request received

Our engineering team will review your application and respond within 24 business hours.