Description
External centering ring with Viton O-ring, aluminium, DN 25 KF is a vacuum fitting component for proper alignment and sealing of DN 25 KF small-flange connections. An aluminium external centering ring carries the Viton O-ring so that mating flanges stay concentric while the elastomer provides the sealing interface in laboratory vacuum assemblies. The item is supplied as a single piece, ready for use when building or servicing pumps, manifolds, traps and instrumentation lines based on the KF standard. This centering ring is suitable wherever aluminium hardware and a Viton seal are specified for DN 25 KF joints. It supports everyday vacuum work in analytical and research laboratories and belongs to the accessories and spare parts used with laboratory equipment. Available from manufacturer WELCH, it gives technicians a straightforward DN 25 KF external centering ring with Viton O-ring for replacement or new installation without changing the flange system already in place on the apparatus.
This article is part of Hose connectors, adapters & fittings, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Product type: External centering ring
- Material: Aluminium
- Seal: Viton O-ring
- Flange size: DN 25 KF
- Connection standard: KF small flange
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Questions about External Centering Ring with Viton O-Ring, Aluminium, DN 25 KF
What is this article?
External Centering Ring with Viton O-Ring, Aluminium, DN 25 KF 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.