Couplings and Disconnects
Couplings and disconnects form the releasable joints in the liquid circuit of a data centre: between rack manifold and server, between coolant distribution unit and riser, and at fill, flush and test points. This branch holds 2,002 items from Nitto Kohki, Cejn, Riegler, LinkTech and Sang-A as well as our own brand. The range covers non-drip designs of the Zero Spill Cupla series, temperature control and hot water couplings, multi-couplings and sealing caps for open ports. Stainless steel AISI 316 and 1.4408 dominate, alongside brass versions.
Four parameters govern selection: nominal bore and the resulting pressure drop, valve design and therefore the residual volume released on disconnect, port thread in G, Rp, R or NPT, and material pairing with pipework, manifold and heat exchanger. In a water-glycol circuit stainless steel, PVDF, PP, PE, PTFE, POM and PVC are unrestricted. Brass, gunmetal and bronze only where the whole circuit uses the same material family; galvanised steel and aluminium not at all.
Categories
All areas for Couplings and Disconnects
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Advantages
Technical characteristics of disconnects in the cooling circuit
The key technical properties at a glance.
In detail
Designs compared
The key data in table form.
Non-drip coupling, temperature control coupling, multi-coupling and sealing cap
| Criterion | Non-drip (clean-break) | Coolant and temperature control | Multi-coupling | Protective and dust cap |
|---|---|---|---|---|
| Purpose | disconnect with negligible fluid loss | connecting cooling and tempering circuits | several circuits in one movement | closing off open ports |
| Shut-off | both sides, flush face | one or both sides depending on series | separate valve per circuit | none, purely mechanical closure |
| Typical series | Zero Spill Cupla ZEL, Cejn non-drip | SP-A Cupla, TSP Cupla, HW Cupla, Compact Cupla | Multi Cupla MAS, MAT, MAM, MALC | sealing caps by Riegler and our own brand |
| Materials | stainless steel, brass | stainless steel, brass | mostly stainless steel, some brass types | stainless steel 1.4408, brass, nickel-plated brass |
| Installed at | server, cold plate, rack manifold | distribution unit, heat exchanger, dry cooler | rack and cabinet docking | unused manifold outlets |
| Items | 132 | 160 | 88 | 206 |
Overview
Typical applications
Background and details for this range.
- Direct liquid cooling of servers: disconnect between cold plate and rack manifold
- Coolant distribution and risers: releasable joints for maintenance and rebuilds during operation
- Filling, flushing and venting the water-glycol circuit at commissioning
- Test and measuring points for pressure, flow and conductivity readings
- Rear door heat exchangers and immersion tanks: connecting supply and return lines
- Closing unused manifold outlets against dirt ingress and leakage