UQDB · Blind-Mate OCP UQD · 02 / 04 / 06 / 08

UQDB Blind-Mate Quick Disconnect Sets

Name: DryLink UQDB Blind-Mate Quick Disconnect Set
Brand: DryLink

Latch-free, self-aligning dry-break pairs for rack and tray builds: both valves close on separation, and radial compensation of 0.8–1.3 mm across the published UQDB class absorbs the misalignment a bolted rack actually has. Four sizes, UQDB02 to UQDB08, on one OCP interface.

Build Standard

The numbers a rack audit asks for first.

Pressure, temperature, body material and the interface floors — stated per order, with the test record that proves them shipping inside the carton.

Coupling · Build

Pressure, temperature, body

Envelope tiers matched to the strongest published UQDB lines — because GPU manifolds run glycol loops that start cold on a winter morning and spike warm at full load.

Working pressureup to 20 bar · size-class dependent
Burst pressureup to 80 bar — ≥ 3× working
Temperature-40 to +120 °C
Bodies316L stainless steel
SealsEPDM std · FKM / FVMQ option

Interface · OCP

What the standard locks in

Every set is gauged against the OCP UQD Rev 1.0 envelope before packing, so plugs and sockets keep interchanging across brands for the life of the rack.

SizesUQDB02 · 04 · 06 · 08
Spillage per disconnect0.020 – 0.070 ml @0 psi
Mate cycles5000 · OCP floor
Height envelope1U · 44.45 mm pitch
Color codered hot supply · blue cool return

UQDB blind-mate coupling pair aligning on a manifold port, macro detail of the self-centering face

Rack Install

Blind mating is a tolerance game — compensation wins it.

In a GPU rack, the manifold is bolted to structure while the cold plate floats on the board, so assembly misalignment lands entirely on the coupling. A blind-mate UQDB closes that gap without guide pins in your chassis: the socket leads the plug, centers it radially, seats both valves and locks without a latch — one push per tray, no threaded fitting to chase.

0.8 – 1.3 mm — radial compensation published across the UQDB class
53 – 71 N — class mate force from UQDB02 to 08, serviceable by hand
2 / 2 valves closed — on separation both sides seal at once, nothing drips onto the trays below

Compared

Generic fittings vs DryLink UQDB.

Where a plain barbed fitting leaves the loop to chance, the OCP UQD dry-break pair puts a number on every failure mode.

Requirement	Generic barbed fitting	DryLink UQDB
Coolant spill on disconnect	open ends drip into the chassis	both valves close — 0.025 ml class limit (dash-04)
Interface standard	varies by vendor, no cross mating	OCP UQD open interface, cross-brand
Rack-level alignment	manual aim, thread chasing	self-aligning, 0.8 – 1.3 mm compensation class
Hot-swap cold plates	drain the loop first	live swap, loop stays charged
Mate-cycle rating	rarely published	5000 cycles — OCP floor
Leak evidence per batch	none supplied	helium + vacuum-decay report in the box
Seal compounds	compound often unspecified	EPDM standard · FKM / FVMQ option, glycol-rated

Specifications

UQDB set — typical class data.

Values below are typical class data aligned with OCP UQD Rev 1.0 and the published UQDB fact sheets; order-specific certified drawings and test reports govern production.

Parameter	Typical class value
Interface	blind-mate, latch-free, self-aligning
Sizes	UQDB02 / 04 / 06 / 08
Radial alignment compensation	0.8 – 1.3 mm (class)
Flow diameter across sizes	3.15 – 9.3 mm
Minimum Cv	0.25 / 0.80 / 1.60 / 2.50 (OCP floors)
Rated flow	0.55 / 1.7 / 3.0 / 4.7 GPM (OCP)
Working pressure by size	20 / 16 / 10 / 6.89 bar (class)
Burst pressure by size	60 / 48 / 30 / 20.68 bar (class)
Air inclusion per cycle	0.04 – 0.096 cc (class)
Spillage @0 psi	0.020 / 0.025 / 0.035 / 0.070 ml (OCP)
Mate force	53 – 71 N (class)
Bodies	316L stainless (303 / 304 class-equivalent)
Seals	EPDM standard; FKM / FVMQ optional
Temperature	-40 to +120 °C (elastomer class to +150 °C)
Plug end	ORB thread per ISO 11926-3
Durability	5000 mate cycles (OCP floor)

FAQ

UQDB questions we answer daily.

How is UQDB different from UQ04?

UQDB describes the interface form — blind-mate, latch-free, self-aligning. UQ04 describes a size class — the dash-04 (1/4") OCP tier with Cv 0.80 minimum and 1.7 GPM rated flow. The two are orthogonal: a UQDB04 is both blind-mate and dash-04. Pick UQDB where trays mate into a fixed plane, hand-push UQD for cold-plate service loops.

Which seal compound should I order?

EPDM is standard and covers water/glycol loops from -40 to +120 °C. FKM extends to -15…+200 °C for warm-process loops; FVMQ reaches -55…+155 °C for cold-aisle starts. All compounds are qualified against glycol coolants such as DOWFROST LC 25 and JEFFCOOL ISF-25.

Will DryLink UQDB mate with other brands?

Yes — UQD/UQDB is an open OCP interface (Rev 1.0, published 2020). Compliant plugs and sockets interchange across vendors, and an Intel-led consortium now standardizes cross-brand mating durability. DryLink sets are gauged against the Rev 1.0 envelope before packing.

What is the MOQ and sample lead time?

MOQ starts at 50 pieces per SKU. A drawing or photo is enough to quote — response within 48 hours. Standard sets ship in 15 days; custom configurations run 30–45 days after drawing approval.

UQDB coupling set installed on a vertical manifold bank inside a GPU server rack