DryLink UQD & UQDB quick disconnects · rack manifolds
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Half-inch quick disconnect coupling resting beside two coils of braided supply hose
−10 series ISO 11926 - 3
Engagement at 100 psi 15–25 lbf
Key dimension ±0.025 mm
UQD08 · 1/2 inch · Rack & CDU backbone

UQD08 (1/2") Quick Disconnects for Rack & CDU Backbones

The largest hand-mate bore in the UQD family: the segment between the rack-side manifold and the CDU loop.

Request −10 data

Engagement & disengagement force

Recommended values · per the OCP UQD specification

Engagement 15–25 lbf

Right endpoint marked

Disengagement 10–20 lbf

Engagement
15–25 lbf
Disengagement
10–20 lbf
Measured at
100 psi

Both intervals are measured at rated pressure, so a technician working a rack once a week meets the same figure every visit. Source: per the OCP UQD specification, recommended.

Undersized and half-inch couplings of the same family standing side by side

Why the tolerance is measured in microns

Key dimensions verified per batch · per the OCP UQD specification

Macro of the ball contact faces and the seal seat of an opened coupling
Key dimension ±0.025 mm per the OCP UQD specification
Ball contact face ≥24 HRC per the OCP UQD specification
Verification CMM key dimensions, per production batch

Hardness is the gate on wear-type leakage. A contact face below the floor deforms within the first few hundred cycles, and the leak shows up as a film at the seal seat rather than as a drip.

Discussed: ball contact hardness · lapped seal seat · batch CMM record

Termination: ORB −10 and hose

Port standard · per the OCP UQD specification

Port thread −10 series ORB per ISO 11926-3, sized for 1/2 in flow
Hose fitting 5/8″–3/4″ equivalently sized industry parts · industry practice
Routing Hose / tube both a flexible hose run and a hard-tube transition

Left: −10 ORB section

Upper branch: hard tube

Lower branch: flexible hose

Threaded ORB port with a coiled supply hose beside it

What the part is reviewed against

Safety reference & test methods · standard numbers cited directly

A row of leak and pressure test benches against a workshop wall, rendered
Safety IEC 62368 - 1 clause G.15, carried as a safety reference
Hydraulic test ISO 18869:2017 test methods for the pressure and leak programme
Documentation Certificate ships with the goods; clause mapping on request

The two standard numbers above are the answer to "reviewed against what". Neither is a mark held by DryLink; the first is cited as a safety reference, the second as the test method behind the pressure data.

Request the clause-mapped test report format

Working-pressure band

Specification floor to market ceiling

Specification rung · per the OCP UQD specification

Market ceiling · industry guide data

Rated working pressure
100 psi
Market parts reach
11 bar / 150 psi
Headroom decision
Transient curve

The upper rung is an industry guide figure for what market parts reach, not a rating of this page's part. Pick headroom against the transient curve, and re-check the relief setting against the same transient events.

Engagement force · ball contact hardness · ORB −10 termination · 100 psi band floor

Half-inch states in the loop

Four interchangeable states · rack and CDU

A half-inch coupling pair beside a steel rule with unreadable graduations
Scale referenceWidest pair in the family, laid against a rule.
A half-inch plug and socket drawn apart, both bodies reading broad
UnmatedThe maintenance action: two parts, no tooling.
A half-inch coupling pair inline on a rack trunk pipe with an insulated run receding
Trunk runInline on the rack trunk, insulation receding behind.
A CDU faceplate carrying a half-inch port pair with braided hoses dropping away
CDU interfaceWhere the backbone meets the CDU faceplate.
Four couplings of increasing bore in one ascending row, each joined to a thicker hose
Family rowEvery bore in the family, ascending.
One mated coupling pair beside the same pair drawn apart, plug and socket facing each other
Mate statesMated and seated apart, same pair.
A rack rear showing a vertical pipe pair feeding braided hoses to a cold plate
Loop routePipe pair to cold plate, rear of rack.
A rack-side panel with a machined coupling spigot, blue latch levers beside it and a black hose running out of frame
Rack bulkheadA rack-side face with couplings and hose.
UQD couplings and a black hose arranged on a neutral grey gradient ground
Family setBodies, collars and hose as one kit of parts.
Two glazed doors and the work window of a machine enclosure on a green epoxy floor
Seat machiningEnclosure doors on the machining floor.
Spec sheet request

Sizing the backbone?

Send the loop segment and the port standard. The −10 series data sheet and the clause-mapped test report format come back together.

Request −10 data

One business day · English quote + one-page spec sheet · designed to the OCP UQD specification