UQD couplings

Liquid cooling Flat Face Non-drip Stainless steel

The Universal Quick Disconnects (UQD) is a global standard for quick disconnect couplings developed within the OCP (Open Compute Project). UQD is an Intel initiative for an open standard spill-free quick couplings for liquid cooling in data centers.

Technical data

Nominal flow diameter (mm) 3.2, 6.4 mm
Max working pressure (bar) 10 bar

The universal standard for efficient quick disconnects for liquid cooling systems

CEJN offers two sizes of the UQD, UQD02 and UQD04, specifically designed for liquid cooling applications in HPC and data centers. The UQD is a standard initiated by Intel and developed as an open standard within OCP (Open Compute Project).

As an open standard, any manufacturer's products are connectable by following the specifications of the UQD standard. With CEJN high precision manufacturing and long experience in high-quality quick disconnect couplings for a wide range of applications, our range of UQD quick couplings is guaranteed to meet and exceed the standard specifications.


  • Spill-free design with minimum air intrusion at connection
  • Redundant sealing with double EPDM rubber seals to eliminate the risk of leaks
  • Full stainless steel design for improved fluid compatibility
  • Meets and exceeds standard specifications
  • Compact design to fit any liquid cooling application
  • Hot-swappable allowing connection and disconnection under pressure

No clamps or ferrules with push-lock hose and hose barb

The hose connection defined in the UQD standard is of push-lock hose barb type. The use of a push-lock styled hose enables quick, secure and leak-free connection without using ferrules or hose clamps. The hose barb is designed to lock onto the hose by just pushing the hose onto the barbs. The plastic stop ring ensures that the hose is properly fitted on the hose barb for a secure and leak-free connection.


Compare our different series of liquid cooling quick couplings for thermal control solutions to find a quick coupler that suits your needs.

Durable and lightweight dry-break quick couplings
Compact dry-break quick disconnect couplings
Valveless quick couplings with unrestricted flow
Dry-break quick couplings for rack installations
Universal standard dry-break quick couplings
  Discover ultraFLOW Discover Non-drip Discover Full-Flow Discover Blind-Mate Discover UQD
Main features Spill-free
Improved valve shut-off
Low pressure drop
Compact design
One-hand operation
Available with key coding
Compact design
Unrestricted flow
Compact design
Double EPDM seals
Universal standard
Dry-break design -
Flow capacity ●●●●○ ●●●○○ ●●●●● ●●●●○ ●●●○○
Compact dimensions ●●●○○ ●●●●○ ●●●●● ●●●●○ ●●●○○
Long-term durability ●●●●● ●●●●○ ●●●●● ●●●●○ ●●●●●
Material Hard anodized aluminum, Stainless steel
Other material available upon request
Nickel-plated brass
Stainless steel
Nickel-plated brass
Stainless steel
Surface treated aluminum
Nickel-plated brass
Stainless steel
Stainless steel
Available accessories - Dust caps, adapters, key coding, safety lock Adapters Adapters Adapters
Application examples Data centres, power electronics, transportation, medical imaging, industry, renewable energy, broadcasting, radar equipment Data centres, power electronics, transportation, medical imaging, industry, renewable energy, broadcasting, fluid transfer, chemical transfer Power electronics, renewable energy Data centres, power electronics,  medical imaging, electric industrial vehicles, renewable energy, radar equipment Data centres, HPC



Quick Connect Couplings:
A Critical Component in Liquid Thermal Management Solutions


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