Description
Replacement PTFE stopcock serves as a spare component for plastic burettes in laboratory titration and liquid-handling work. The stopcock is specified with a bore and PTFE hose of 2,5 mm inner diameter together with a tube diameter of 6 mm, ensuring dimensional compatibility with matching burette systems. Constructed entirely from PTFE, the part offers the chemical resistance and low surface energy characteristic of this fluoropolymer, making it suitable for contact with a wide range of aqueous and organic reagents commonly encountered in analytical laboratories. Supplied as a single unit from manufacturer Witeg, the stopcock restores reliable on/off control and drip-free operation when the original valve has worn or become damaged. Its compact design and precise bore geometry support accurate volumetric delivery in routine quantitative analysis, media dispensing and educational titration setups. The component integrates directly into existing plastic burette assemblies without modification, maintaining the original flow path and sealing performance required for reproducible laboratory results.
This article is part of Stopcocks & valves, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Material: PTFE
- Bore / hose ID: 2,5 mm
- Tube diameter: 6 mm
- Type: Replacement stopcock
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Questions about Separate PTFE-stopcock, 2,5 mm bore of p
What is this article?
Separate PTFE-stopcock, 2,5 mm bore of p is the article on this page. Luminix Health distributes Witeg 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.