Description
Glass flange, standard, DN 25 is a precision small flange produced from borosilicate glass 3.3 in accordance with DIN 28403. Designed for laboratory vacuum and process systems, it is equally suitable for direct connection to matching DIN metal flanges, enabling hybrid glass–metal assemblies without adapters. The material combines high chemical resistance with excellent thermal shock tolerance, making the component reliable for repeated heating, cooling and vacuum cycles. Supplied as a single piece with a net weight of 0,051 kg, the flange integrates smoothly into modular glass apparatus and supports standard DN 25 interfaces used throughout analytical and preparative setups. Its geometry ensures consistent sealing surfaces and mechanical stability under typical laboratory loads. Manufactured by Rettberg, this standard glass flange provides a durable, inert connection element for vacuum lines, reaction vessels and transfer systems where borosilicate glass 3.3 performance is required. The part is intended for routine laboratory construction and maintenance tasks that demand dimensional accuracy and long-term material integrity.
This article is part of Hose connectors, adapters & fittings, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Material: Borosilicate glass 3.3
- Product type: Small flange
- Standard: DIN 28403
- Nominal size: DN 25
- Technical Information Sheet:
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Questions about Glass flange, standard, DN 25
What is this article?
Glass flange, standard, DN 25 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.
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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.