Description
1-Way stopcock polished NS 12,5 is a compact laboratory glass stopcock for precise one-way flow control in smaller apparatus and fine-scale fluid handling. It features a polished finish, NS 12,5 ground joint, bent tube connectors and a 2,5 mm bore, making it suitable where limited flow and a smaller joint size are required. An NS-PTFE plug provides chemically resistant sealing with smooth operation, while an elastic threaded stopcock lock helps keep the plug securely in place during use. The unit is manufactured from DURAN tubing and is supplied as a single piece with a net weight of 0,036 kg. Bent connectors support flexible tubing layout and reduce mechanical strain in tight laboratory assemblies. This stopcock from manufacturer Witeg is intended for research, analytical and teaching environments that need a durable, interchangeable one-way valve with a fine bore and polished NS 12,5 interface for distillation side-arms, small vacuum lines and general glassware setups.
This article is part of Stopcocks & valves, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Type: 1-way stopcock polished with bent tube connectors
- Joint size: NS 12,5
- Bore: 2,5 mm
- Plug: NS-PTFE with elastic threaded lock
- Material: DURAN tubing
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Questions about stopcock ST 12,5 / 2,5
What is this article?
stopcock ST 12,5 / 2,5 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.