Description
External centering ring with Viton O-ring, aluminium, DN 40 KF is a vacuum flange accessory for KF small-flange connections used on laboratory pumps, manifolds, and apparatus. The part combines an aluminium external centering ring with a Viton O-ring sized for the DN 40 KF standard, so opposing flanges can be aligned and sealed when a clamp is fitted. Aluminium provides the rigid centering geometry that keeps the joint coaxial, while the Viton elastomer forms the compressible sealing interface between the flange faces. Supplied as 1 pc, the ring is suitable for new builds, service kits, or replacement of worn centering and sealing elements on DN 40 KF lines. In routine laboratory vacuum work, external centering rings of this type support repeatable assembly and help maintain joint integrity during setup, maintenance, and reconfiguration. This accessory from manufacturer WELCH belongs to the spare-parts and accessories range for laboratory equipment and is specified wherever an aluminium DN 40 KF external centering ring with Viton O-ring is required for KF vacuum connections.
This article is part of Hose connectors, adapters & fittings, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Type: External centering ring
- Body material: Aluminium
- O-ring material: Viton
- Nominal size: DN 40 KF
- Flange standard: KF small flange
Récemment consulté
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Questions about External Centering Ring with Viton O-Ring, Aluminium, DN 40 KF
What is this article?
External Centering Ring with Viton O-Ring, Aluminium, DN 40 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 Matériel de laboratoire.
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 Matériel de laboratoire.
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.