Description
Flexible coupling DN 25 KF, 120 mm is a flexible vacuum connection component for laboratory apparatus and technical vacuum lines. It features a DN 25 KF flange interface and an overall length of 120 mm, providing a short flexible link between matched KF components while keeping the nominal flange size unchanged. The article is supplied as a single piece and belongs to accessories and spare parts for laboratory equipment. Within vacuum manifolds, pump lines and instrument connections, such a coupling assists with minor misalignment and limits mechanical load on rigid tubing or apparatus joints. This flexible coupling from manufacturer WELCH is designed for use in standard KF vacuum assemblies common in analytical, process and research laboratories. The 120 mm length is suitable for bench-scale and instrument installations that require a defined flexible section at DN 25 KF. Facilities can employ the part as a replacement or extension element in existing KF infrastructure. Explicit flange and length designation simplifies matching to system layouts and spare-part documentation.
This article is part of Hose connectors, adapters & fittings, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Product type: Flexible coupling
- Flange size: DN 25 KF
- Connection standard: KF
- Length: 120 mm
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Questions about Flexible Coupling, DN 25 KF, 120mm
What is this article?
Flexible Coupling, DN 25 KF, 120mm is the article on this page. Luminix Health distributes WELCH for laboratory use. It sits in Hose connectors, adapters & fittings, inside Tubing, hoses & fittings, in Labware.
A hose connector or adapter joins two lines, or steps one bore down to another. The barb diameter has to match the tube, and the thread has to match the stopcock or the bottle. Most leaks are a mismatch here, not a hole in the tube.
Tubing is how a liquid or a gas moves between two vessels without being poured. Silicone stays flexible and survives repeated autoclaving. PTFE resists almost every solvent and is stiff. PVC is the ordinary flexible line for water and for mild aqueous work. The fitting, not the tube, is what usually leaks: the barb, the thread and the stopcock have to match the tube bore. Glass and plastic apparatus around these lines is indexed under ISO laboratory ware.
Which category should I open next?
The category is Tubing, hoses & fittings. The sub-category is Hose connectors, adapters & fittings. The catalogue is Labware.
Shelves beside this one are PVC, PTFE & other tubing, Stopcocks & valves, Silicone tubing and Tubing accessories.
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.