UQ04 · Dash-04 Hand-Push · OCP UQD

UQ04 Hand-Push Quick Disconnect Sets

Name: DryLink UQ04 Hand-Push Quick Disconnect Set
Brand: DryLink

The 1/4-inch (dash-04) tier of the OCP UQD standard for cold plates, switch boards and service loops: Cv 0.80 minimum, 1.7 GPM rated flow, and a spill budget of 0.025 ml per disconnect at the OCP limit — in a one-hand, push-to-mate package.

Build Standard

Dash-04 floors on one card, our build on the other.

The left card is the audit table any dash-04 purchase order is checked against; the right card is how DryLink meets it, part by part.

UQ04 · Class

Dash-04 performance floors

Floors quoted from OCP UQD Rev 1.0 — the numbers your quality gate will audit against, from flow class to spill budget.

Minimum Cv0.80
Rated flow1.7 GPM
Spillage @0 psi≤ 0.025 ml per disconnect
Working pressure100 psi (class max rating)
Burst pressure300 psi (class min)

Build · DryLink

How DryLink builds it

Valve seats ground to ±0.01 mm on the same cell that machines our manifolds, and every piece helium-tested before a matched set is boxed.

Bodies316L stainless steel
SealsEPDM std · FKM / FVMQ option
Plug endORB per ISO 11926-3
Socket endbarbs · 1/4"–5/8" EPDM hose
Test recordhelium report in every carton

Technician hand-mating a UQ04 coupling set on a cold plate board, red and blue coding visible

Cold-Plate Service

One hand, one second, zero drip.

Cold plates live on 1U pitch — a 44.45 mm height envelope — and get swapped far more often than anyone schedules. A hand-push UQ04 mates and releases inside that envelope with a gloved hand: no tools, no drain-down, and both valves close before the plug clears the socket, so the tray below stays dry through thousands of service cycles.

44.45 mm — 1U pitch envelope the set is designed within
≤ 0.025 ml — spill budget per disconnect, dash-04 OCP limit
5000× — rated mate cycles before rebuild review

OCP Floors

Three numbers govern the dash-04 class.

Everything else is negotiation; these are the specification. If a datasheet will not print all three, keep shopping.

≤0.025mlspillage per disconnect · OCP dash-04 limit

5000×mate / unmate cycles · OCP floor

100–300 psiworking to burst · OCP class minimums

Specifications

UQ04 set — build value and standard floor, side by side.

Our commitment against the OCP Rev 1.0 requirement for every row — nothing hidden between columns.

Parameter	DryLink UQ04 set	OCP Rev 1.0 floor
Interface size	dash-04 (1/4")	1/4" class
Minimum Cv	0.80	0.80
Rated flow	1.7 GPM	1.7 GPM
Spillage per disconnect @0 psi	≤ 0.025 ml	0.025 ml
Working pressure	100 psi	100 psi max rating
Burst pressure	300 psi	300 psi min
Mate / unmate durability	5000 cycles	5000 cycles
Service fluid temperature	17–65 °C	17–65 °C
Seal temperature window	-40 to +120 °C (EPDM)	elastomer class
Height envelope	1U · 44.45 mm	44.45 mm
Ball contact hardness	≥ 24 HRC	24 HRC
Plug end	ORB per ISO 11926-3	ISO 11926-3
Socket end	barbs · 1/4"–5/8" reinforced EPDM hose	minimum barbed
Coolant compatibility	water/glycol · DOWFROST LC 25 / JEFFCOOL ISF-25 class	specified coolants
Color code	red supply · blue return	red / blue
Pieces per set	matched plug + socket, boxed with report	—

FAQ

UQ04 questions we answer daily.

UQ04 or UQDB — which do I need?

If a person swaps the hardware by hand, hand-push UQ04 is the service-friendly choice. If trays or blades mate into a fixed plane inside the rack, blind-mate UQDB removes the human from the loop. Both share the OCP UQD envelope, so a UQDB04 port and a UQ04 port can sit on the same rack manifold.

Can I run UQ04 above 100 psi?

No — 100 psi working with 300 psi burst are the OCP class ratings. Rack loops planned at 1.2 L/min per kW against an 18 psi rack budget sit far below them. For genuinely higher-pressure circuits, send the loop ΔP calculation and we will review a non-OCP coupling option before quoting.

Which hose and thread sizes does the set take?

Plug ends are ORB per ISO 11926-3, so they thread into standard board manifolds. Socket ends are barbed for 1/4" to 5/8" reinforced EPDM hose, clamped per the OCP specification examples — no proprietary ferrules.

Which seal compound for glycol loops?

EPDM is the default for water/glycol from -40 to +120 °C. Choose FKM for -15…+200 °C warm-process loops or FVMQ down to -55…+155 °C cold starts. Compounds are qualified against DOWFROST LC 25 and JEFFCOOL ISF-25 class coolants.

UQ04 coupling set connected to a cold plate loop inside a 1U server chassis

Need dash-04 this quarter?

Send the cold-plate drawing — quote in 48 hours, MOQ from 50 pieces, standard sets ship in 15 days, FOB · CIF · DDP.

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