Description
Adapter flange KF-Swagelok DN 25, 4 mm is a connection adapter that links a KF flange in DN 25 size to a Swagelok-style tube interface of 4 mm. It is intended for laboratory vacuum and process lines where a defined KF-to-Swagelok transition is needed between larger DN 25 flange hardware and smaller 4 mm tubing. The product identity is fully described by the KF-Swagelok DN 25, 4 mm designation, clarifying both the flange nominal size and the tube diameter on the Swagelok side. Delivered as 1 pc, the adapter serves as an accessory or replacement part for laboratory equipment that employs this specific flange and tube combination. From manufacturer WELCH, the component sits within accessories and spare parts for laboratory devices and supports assembly or maintenance of systems built on standard KF and Swagelok geometries. Use is guided by the stated DN 25 and 4 mm dimensions alone, providing a clear mechanical interface choice for matching vacuum or fluid-handling setups that require this adapter configuration.
This article belongs in Other instruments & spare parts.
Key features
- Pack size: 1 pc
- Product type: Adapter flange
- Connection: KF-Swagelok
- KF size: DN 25
- Tube diameter: 4 mm
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Questions about Adapter Flange KF-Swagelok DN 25, 4mm
What is this article?
Adapter Flange KF-Swagelok DN 25, 4mm is the article on this page. Luminix Health distributes WELCH for laboratory use. It sits in Other instruments & spare parts, in Instruments de précision.
Some instruments do not sit cleanly in one measuring principle, and every instrument eventually needs a spare: a lamp, a fuse, a seal, a knob. The spare has to be the part for that model. A near match is a different part. Calibration of the instrument, once it measures, belongs with EURAMET, BELAC and the BIPM.
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The category is Other instruments & spare parts. The catalogue is Instruments de précision.
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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.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.

