Description
Centering ring with screen and Perbunan O-ring, stainless steel, DN 25 KF is a vacuum flange accessory intended for alignment and sealing of KF-style laboratory connections. It combines a stainless steel centering ring, an integrated screen, and a Perbunan elastomer O-ring to support reliable joint assembly at DN 25 KF interfaces found on vacuum pumps, manifolds, and analytical systems. The screen assists in retaining particles at the flange face, while the Perbunan O-ring forms the sealing element between mating components. Supplied as one piece, the ring is appropriate for maintenance, upgrades, or replacement of KF hardware in laboratory and technical environments. This accessory from manufacturer WELCH matches modular vacuum setups that use standardized DN 25 KF geometry with clamp-style couplings. Stainless steel provides durable mechanical support through repeated assembly cycles, and the Perbunan O-ring suits common laboratory vacuum service. Specify this screened centering ring wherever DN 25 KF flanges require a complete ring-and-seal unit for instruments, process lines, or laboratory spare-parts stock.
This article is part of Hose connectors, adapters & fittings, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Product type: Centering ring with screen and O-ring
- Material: Stainless steel
- O-ring material: Perbunan
- Flange size: DN 25 KF
- Design: Integrated screen
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Questions about Centering Ring with Screen and Perbunan O-Ring, Stainless Steel, DN 25 KF
What is this article?
Centering Ring with Screen and Perbunan O-Ring, Stainless Steel, 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?
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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.