Description
3-way stopcock PTFE thread NS 18,8 is a laboratory stopcock with T-bore for multi-path flow control in glass apparatus. It features ground joint size NS 18,8, an NS-PTFE plug and a threaded stopcock lock for dependable seating. Bent tube connectors are 9 × 100 mm and the bore diameter is 2,5 mm, conforming to DIN 12554. This single-piece unit from manufacturer Witeg has a net weight of 0,081 kg. The PTFE plug with threaded retention provides a secure seal at the NS 18,8 joint, while the T-bore layout supports three-way routing of process streams in typical laboratory glassware. Bent ends of 9 × 100 mm ease coupling to adjacent tubing or joints, and the 2,5 mm bore sets the internal passage. Manufactured to DIN 12554, the stopcock is intended for assemblies that call for an NS 18,8 three-way valve with PTFE plug and threaded lock. At 0,081 kg it remains a practical fitting for benchtop and apparatus work requiring the larger NS 18,8 connection.
This article is part of Stopcocks & valves, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Joint size: NS 18,8
- Bore: T-bore, 2,5 mm
- Plug: NS-PTFE with threaded lock
- Tube connectors: 9 × 100 mm bent
- Standard: DIN 12554
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Questions about Stopcock, three-way PTFE NS 18,8
What is this article?
Stopcock, three-way PTFE NS 18,8 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.