Description
Blank-off flange, stainless steel, DN 25 KF is a vacuum accessory used to close unused ports on standardised KF (NW) flange connections. The component is made of stainless steel and is sized for the DN 25 KF interface widely employed on laboratory vacuum pumps, manifolds, chambers and analytical instrument inlets. Fitted with the matching clamp and centring ring, the blank-off flange provides a secure mechanical seal so that open KF ports can be capped during setup, reconfiguration or maintenance. Supplied as 1 piece, it is practical as a dedicated spare or as part of a vacuum-line build in research and routine laboratory environments. This stainless steel blank-off flange from manufacturer WELCH is intended for accessories and spare-parts use with laboratory equipment where DN 25 KF geometry must be retained. Selecting the correct DN 25 KF size ensures dimensional compatibility with existing KF hardware and helps preserve vacuum integrity on lines that are temporarily or permanently unused. The plain stainless steel construction suits general laboratory vacuum service without additional surface treatments stated in the source data.
This article is part of Hose connectors, adapters & fittings, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Product type: Blank-off flange
- Material: Stainless steel
- Flange size: DN 25 KF
- Interface: KF (NW) vacuum flange
Recently viewed
You may also like
Questions about Blank-Off Flange, Stainless Steel, DN 25 KF
What is this article?
Blank-Off Flange, 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?
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.