Description
Spare O-ring, Perbunan, DN 40 KF is a replacement sealing ring for KF vacuum flange connections used on laboratory equipment. Made from Perbunan elastomer, it is sized for the DN 40 KF (Klein Flange) interface found on many vacuum pumps, manifolds, adapters and related apparatus. Supplied as a single piece, the ring is intended as a practical spare when original seals age, harden or require exchange during routine maintenance. Matching the DN 40 KF geometry supports a consistent fit on compatible fittings and helps restore sealing performance at the joint. In laboratory vacuum work, reliable O-ring seals contribute to stable connections during sample handling, filtration support and process set-ups. Keeping a suitable Perbunan DN 40 KF spare on hand reduces downtime when a seal must be replaced quickly. This component from manufacturer WELCH is aimed at users who service KF-connected laboratory devices and need a straightforward replacement matched to the DN 40 KF specification without altering the existing flange hardware.
This article is part of Hose connectors, adapters & fittings, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Product type: Spare O-ring
- Material: Perbunan
- Flange size: DN 40 KF
- Connection standard: KF (Klein Flange)
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Questions about Spare O-Ring, Perbunan, DN 40 KF
What is this article?
Spare O-Ring, Perbunan, 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 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.