DryLink UQD & UQDB quick disconnects · rack manifolds
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A horizontal manifold spanning the front beam of a rack frame with ports evenly spaced

Horizontal rack manifolds — front-of-rack distribution

The header runs across the front of the rack, over the aisle the technicians already work from, with the CDU feed arriving from the top.

Front-of-rack mounting position · industry practice

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Lock the port pitch first

Two scales · 3.55 mm apart · industry practice

Upper scale · EIA 1.75 in = 44.45 mm

Lower scale · ORv3 1.89 in = 48 mm

Marked: where the row ends up if the pitch is wrong

Wrong pitch means
Ports miss
Decided at
Drawing release
Difference per port
3.55 mm

Ports that do not line up with the server row cannot be reached, however good the manifold is. Confirm the pitch before the drawing is released; changing it afterwards moves every port in the row. Source: industry practice.

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Built accuracy

Inner surface, tolerance, finish · industry practice

A close passivated stainless bore and port interior
Inner surfaceBore and port interior after passivation.
An aluminium-framed test bench: a white-lined trough under a raised lid, a row of quick-connect fittings along its rail and a pressure gauge on the frame
Test benchTrough, fitting rail and gauge.
Inner surface Ra ≤0.6 µm industry practice
Manufacturing tolerance ±0.02 in industry practice
Finish Passivated stainless, corrosion resistance · industry practice
Prototype lead time 7 working days industry practice · not a committed delivery date

Bore roughness is what keeps the loop clean downstream; the tolerance is what keeps the port row on the drawing. The lead time above is what the industry quotes for a prototype run, not a date this page commits to.

Length and configuration

Three standard lengths plus custom · industry practice

Three horizontal manifold tubes of clearly different length lying together
Supplied lengths 42U / 48U / 50U industry practice, plus custom configurations
Port count Per elevation quoted from the rack elevation drawing
Lead time On review given with the drawing review · industry-typical

Length follows the rack, not a catalogue: the same header is cut and ported to the elevation you send, which is why the port count is quoted rather than listed.

Length driver Rack U height the same series that sets the vertical family's heights
Cross-check 42U → 50U length and rack height are read off one drawing
A manifold standing beside a rack frame, showing the height it has to match

Front or rear: pick by the aisle

Mount position comparison · industry practice

A rack front with a manifold mounted on the front position
Horizontal Front of rack this family · industry practice
Vertical Rear, 0U the sibling family · industry practice
The deciding question Which aisle the side the rack is serviced from decides it

Racks serviced from the front aisle take the front-mounted header; racks serviced from the rear take the 0U column. Choosing against the service aisle is the one mistake that cannot be fixed with a longer hose.

Left: service aisle, this family mounts at the front face

Right: the 0U rear column

The other two families

Same headers, different mounting

A full-height vertical manifold standing against a rear rack post Vertical 0URear column, 42U 1800–1900 mm through 52U over 2400 mm. An ORv3 rack front showing a port row on 48 mm pitch ORv348 mm pitch, blind-mate docking.

Around the header

Hose, feed end, parts and family

A horizontal manifold above a shelf with six braided hoses gathered to one side
Hose bundleSix hoses gathered clear of the shelf.
Macro of the feed end of a horizontal manifold showing its machined end cap and supply hose
Feed endWhere the CDU feed enters the header.
Four blind-mate coupling pairs in bare stainless arranged in ascending order
Port partsWhat the front row's ports mate with.
A rack-side panel with a machined coupling spigot, blue latch levers beside it and a black hose running out of frame
Rack endWhere the header leaves the rack frame.
A full-height vertical manifold standing against a rear rack post
Vertical 0URear column family.
A horizontal manifold spanning the front beam of a rack frame
HorizontalThis family, in context.
An ORv3 rack front showing a port row on 48 mm pitch
ORv348 mm pitch family.
Layout request

EIA or ORv3?

Send the rack standard, the node count and the length you need. The pitch is confirmed first: EIA 1.75 in (44.45 mm) or ORv3 1.89 in (48 mm).

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