Description
Sealing ring, Viton, for KS 19/9 is a dedicated sealing component for spherical ground joints used in laboratory glassware. Sized specifically for the KS 19/9 joint, it forms the sealing interface in ball-joint assemblies such as sockets, balls and pans. The ring is supplied as one piece with a net weight of 0,001 kg and is classified under ground-joint connections. Manufactured under the registered trademark Rettberg ® by Rettberg, the Viton sealing ring matches standard KS 19/9 spherical joints and supports reliable assembly of laboratory apparatus. It is intended for use wherever ball-ground-joint systems require a replaceable Viton seal of this exact size. The compact format allows straightforward installation and routine exchange during maintenance of glassware setups. Laboratory users working with Kugelschliff configurations will find the KS 19/9 dimension directly compatible with corresponding joint hardware. This sealing ring therefore serves as a precise spare part for spherical-joint glassware lines that specify the KS 19/9 size and Viton material.
This article is part of PVC, PTFE & other tubing, in Tubing, hoses & fittings.
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Questions about Sealing ring, Viton, for size 19/9
What is this article?
Sealing ring, Viton, for size 19/9 is the article on this page. Luminix Health distributes Rettberg for laboratory use. It sits in PVC, PTFE & other tubing, inside Tubing, hoses & fittings, in Labware.
PVC is the flexible everyday tube for water and mild aqueous liquids. PTFE is the stiff, almost inert tube for solvents. Other polymers sit between them. The bore, the wall and the chemical resistance are the specification, and the tube is cut to length.
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 PVC, PTFE & other tubing. The catalogue is Labware.
Shelves beside this one are Hose connectors, adapters & fittings, 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.


