Description
3-Way stopcock with PTFE plug and capillary joints NS 14,5 is a precision laboratory valve for controlled routing of liquids or gases in glass apparatus. It combines a T-bore configuration with nominal size NS 14,5, an NS-PTFE plug, capillary joint ends and a threaded stopcock lock. Capillary arms measure 8 × 100 mm and the bore diameter is 1,6 mm; construction follows DIN 12554. Supplied as one piece with a net weight of 0,062 kg, the stopcock from manufacturer Witeg fits standard ground-joint assemblies used throughout research and quality-control laboratories. The PTFE plug offers chemical resistance and low-friction operation, while the capillary connections support fine-line or microscale tubing links. A threaded lock keeps the plug firmly seated during multi-path switching, reducing the risk of accidental displacement. Typical applications include organic synthesis manifolds, distillation setups and chromatographic sample handling where inert sealing surfaces and reproducible three-way flow control are essential. The compact format integrates readily into existing NS-joint systems without additional adapters.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Design: 3-way stopcock, T-bore
- Joint size: NS 14,5
- Plug: NS-PTFE with threaded lock
- Capillary arms: 8 × 100 mm
- Bore diameter: 1,6 mm
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Questions about 3-way-stopcock PTFE-plug capillary side arm ST14.5
What is this article?
3-way-stopcock PTFE-plug capillary side arm ST14.5 is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Rubber & silicone stoppers, inside Stoppers, caps & closures, in Matériel de laboratoire.
A rubber or silicone stopper is pushed into a mouth. The size number corresponds to a top and bottom diameter. Silicone survives higher temperatures and more autoclave cycles. Natural rubber is attacked by oils and by some solvents.
A closure is the part that decides whether a bottle stays shut and whether the contents attack the seal. A ground-glass stopper matches a ground neck. A screw cap needs the right thread and a liner that survives the liquid. Rubber and silicone stoppers push into a mouth. The liner, not the colour of the cap, is the chemical choice. The vessels they close are indexed under ISO laboratory glassware.
Which category should I open next?
The category is Stoppers, caps & closures. The sub-category is Rubber & silicone stoppers. The catalogue is Matériel de laboratoire.
Shelves beside this one are Screw caps & closures, Ground-joint glass stoppers, Lids & seals and Closures (other).
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.