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Frequently Asked Questions
What does drip-free actually mean?
Both halves seal as the coupling separates.
Neither the server nor the manifold loses fluid.
A small residual volume still sits in the face.
That figure is published and worth asking for.
It is what lands on equipment below.
The term is used loosely by some suppliers.
What has to match before ordering?
Three things, and all are hard constraints.
The coupling already fitted to the hardware.
Materials against the coolant in use.
Pressure and temperature at worst case.
Seals fine in water can fail in other fluids.
Confirm all three with the IT vendor.
Why are blind-mate couplings used?
They remove the human step.
The connection is made as the node slides in.
Nobody has to remember to couple it.
Large deployments treat that as reliability.
Mechanical tolerances have to be tighter.
Retrofit into existing racks is rarely possible.
What is flow balance and why does it matter?
Even distribution across every take-off.
A poor manifold starves the far end.
Those nodes run hotter than the rest.
Nothing reports it except the processors.
Manifold design and sizing decide it.
Ask for the flow distribution, not just capacity.
How many connection cycles should they survive?
Far more than most people estimate.
Every service visit is a cycle.
Manufacturers publish a rated count.
Seal wear is the limiting factor.
Compare rated cycles across candidates.
Keep spare couplings on site.
Can different manufacturers be mixed?
Generally not, and it should not be attempted.
Coupling geometries are proprietary.
Apparent physical fit does not mean sealing fit.
A partial engagement leaks under pressure.
Standardise across the estate early.
Changing later means changing both halves.
What goes wrong at installation?
Debris and over-tightening.
Commissioning debris damages seal faces.
Flush the loop before first connection.
Caps belong on every unconnected half.
Torque figures apply to threaded types.
Most early leaks trace back to the first fill.