Description
DURAN® straight stopcock, taper 1:5, without key, ground and polished is a laboratory glassware barrel featuring a 2,5 mm bore and NS 13,5 joint. Manufactured from borosilicate glass 3.3, the ground and polished stopcock sleeve is designed for use with matching PTFE keys to enable grease-free working. The polished surface ensures smooth operation, while the larger cone angle of the 1:5 taper prevents the key from jamming once fitted. This configuration makes the component especially suitable for vacuum applications and for incorporation into glass apparatus. Supplied without the key as a glass article for further processing, the stopcock from manufacturer Duran/DWK Life Sciences is intended for assembly into custom laboratory glassware systems. It supports reliable shut-off functionality in scientific setups that demand lubricant-free performance and vacuum compatibility. The single-piece unit has a net weight of 0,022 kg and provides a precise foundation for building or maintaining specialised glass installations in research and analytical laboratories.
This article is part of Stopcocks & valves, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Storage temperature: Standard
- Material: Borosilicate glass 3.3
- Bore diameter: 2,5 mm
- Joint size: NS 13,5
- EAN: 4032051056046
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Questions about DURAN® Single Way Stopcock, Taper 1:5, without key, ground and polished
What is this article?
DURAN® Single Way Stopcock, Taper 1:5, without key, ground and polished is the article on this page. Luminix Health distributes DWK Life Sciences for laboratory use. It sits in Stopcocks & valves, inside Tubing, hoses & fittings, in Labware.
A stopcock opens and closes a line, or directs it between ports. Glass stopcocks have a ground plug that needs grease or a PTFE key. The bore decides the flow. A two-way and a three-way key are different parts.
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 Stopcocks & valves. The catalogue is Labware.
Shelves beside this one are Hose connectors, adapters & fittings, PVC, PTFE & other tubing, 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.