Description
2-Way stopcock NS 18,8 with PTFE capillary connectors 2,5 mm is a laboratory glass stopcock designed for controlled flow switching in vacuum and analytical apparatus. It incorporates an NS-PTFE plug, capillary side arms of 2,5 mm bore and a threaded stopcock lock for secure seating during operation. Manufactured in accordance with DIN 12553, the unit is specified as NS 18,8 / 9 x 100 mm and is intended for integration into glassware assemblies requiring reliable two-way routing of gases or liquids. The PTFE plug provides chemical resistance and smooth operation, while the capillary connectors support precise low-volume connections. Net weight is 0,066 kg. Offered as a single piece from manufacturer Witeg, this stopcock is suitable for laboratory setups in chemistry, vacuum lines and general fluid-handling systems where a compact, standardised two-way valve with capillary outlets is required. The threaded lock helps maintain plug position under varying pressure conditions.
This article is part of Stopcocks & valves, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Type: 2-way stopcock with NS-PTFE plug
- Capillary bore: 2,5 mm
- Joint size: NS 18,8 / 9 x 100 mm
- Lock: threaded stopcock lock
- Standard: DIN 12553
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Questions about Stopcock, double bore, 2,5 mm
What is this article?
Stopcock, double bore, 2,5 mm 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.