Description
Centering ring adaptor with Perbunan O-ring, stainless steel, DN 20/25 KF is a KF small-flange interface component for aligning and sealing vacuum joints in laboratory and technical vacuum lines. The stainless steel ring forms a rigid metal seat between mating flanges, while the integrated Perbunan O-ring provides the elastomer seal once the joint is secured with a standard KF clamp. Configured for DN 20/25 KF geometry, it suits medium small-flange connections on pumps, manifolds, traps, filters, and instrument inlets that follow the KF standard. Supplied as one piece, the adaptor is practical for installation, maintenance, and spare-part replacement wherever a metal centering ring with elastomer seal is specified. This vacuum accessory is available from manufacturer WELCH among laboratory equipment fittings and spare parts. In daily use it supports concentric flange alignment and repeatable sealing without altering the established clamp-and-flange assembly method of KF technology. Choose it for DN 20/25 KF centering and sealing tasks in research, quality-control, or process-support environments built on modular small-flange vacuum hardware.
This article is part of Hose connectors, adapters & fittings, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Product type: Centering ring adaptor
- Material: Stainless steel
- Seal: Perbunan O-ring
- Flange size: DN 20/25 KF
- Connection standard: KF small flange
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Questions about Centering Ring Adaptor with Perbunan O-Ring, Stainless Steel, DN 20/25 KF
What is this article?
Centering Ring Adaptor with Perbunan O-Ring, Stainless Steel, DN 20/25 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.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.