Liquid cooling (Everis)
UQD and UQDB (OCP)
- Selection criteria
- Frequently asked questions
- Everis LQ6
- Everis LQ8
- Everis BLQ6
- Data center
- UQD and UQDB couplings (OCP)
- Dry-break couplings
UQD (Universal Quick Disconnect) and UQDB are CPC couplings built to the OCP specification for server liquid cooling, so that parts from different vendors mate with each other. UQD is connected by hand, UQDB is the blind-mate version that couples by itself when a server slides into the rack. Bodies are stainless steel with EPDM seals, flow sizes run from 1/8" (UQD02) through 1/4" and 3/8" to 1/2" (UQD08), and maximum pressure is 6.9 or 8.3 bar depending on the series. The valve disconnects without drips even under pressure, so servers and rack manifolds can be swapped without draining the loop.
Shortcuts by body material and marking colour.
- 18 items
- 1 manufacturer
- Net prices plus VAT
Buying guide
How to choose UQD and UQDB (OCP)
What matters when choosing: properties, comparison and typical applications.
Selection criteria
| Criterion | UQD and UQDB |
|---|---|
| Specification | OCP, UQD04 to UQD08 per OCP V2, backward compatible with earlier OCP versions |
| Flow size | 1/8" (UQD02), 1/4" (UQD04, UQDB04), 3/8" (UQD06, UQDB06), 1/2" (UQD08, UQDB08) |
| Max. pressure | 6.9 to 8.3 bar depending on series |
| Temperature | 2 to 75 °C or 5 to 65 °C depending on series |
| Body | Stainless steel 304 / 1.4301, UQD02 in stainless steel 303 |
| Seal | EPDM |
| Connection type | UQD hand-mated, UQDB blind-mate in the rack |
| Terminations | Locking hose barb, SAE thread |
Frequently asked questions
- What does OCP mean for UQD?
- UQD couplings follow the Open Compute Project specification for server liquid cooling, so coupling halves from different vendors fit together. The V2 versions remain compatible with earlier OCP versions.
- How do UQD and UQDB differ?
- UQD is connected by hand and clicks audibly into place. UQDB is designed for blind-mate use: the joint closes as the server slides into the rack, with no one reaching for the coupling.
- Which size do I need?
- The number in the name stands for flow size: 02 for 1/8", 04 for 1/4", 06 for 3/8", 08 for 1/2". Small sizes suit cold plates inside the server, large sizes the link to the rack manifold.
- Why stainless steel?
- Stainless steel resists corrosion by nature and suits long periods in the connected state.
- Can I disconnect under pressure?
- Yes. Both halves shut on disconnection and no coolant escapes, so servers can be swapped without draining the cooling loop.