Description
Inner centring ring/PTFE DN 40 with Viton O-ring is a precision sealing component intended for accurate alignment and reliable sealing of laboratory flange connections. The PTFE construction offers superior chemical resistance while the integrated Viton O-ring supplies the necessary elasticity for a tight, reusable seal at the DN 40 size. Weighing only 0,010 kg net, the ring remains lightweight yet mechanically stable for everyday use in glassware, vacuum and process apparatus. It functions equally well as an original part or as a replacement spare within existing laboratory systems. Manufactured in Germany under the Rettberg ® trademark and supplied by manufacturer Rettberg, the component belongs to the seals product category. Its design supports leak-free joints in chemical synthesis, analytical instrumentation and research environments where inert materials and long service life are required. Packaged as 1 pc, the ring enables straightforward ordering for maintenance or new assemblies, helping laboratories maintain system integrity and minimise downtime caused by worn or missing centring seals.
This article is part of Hose connectors, adapters & fittings, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Material: PTFE with Viton O-ring
- Nominal size: DN 40
- Product type: Seals
- Trademark: Rettberg ®
- Technical Information Sheet:
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Questions about Inner centering ring/PTFE DN 40, with Viton-O-Ring
What is this article?
Inner centering ring/PTFE DN 40, with Viton-O-Ring is the article on this page. Luminix Health distributes Rettberg 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.