Description
Straight-through stopcock according to Schiff NS 18,8 is a glass laboratory stopcock designed for controlled flow in vacuum and general laboratory apparatus. It incorporates a hollow NS glass plug, joint size NS 18,8, with overall plug dimensions of 10 × 110 mm and a bore of 4 mm. Manufactured in accordance with DIN 12545, the stopcock provides a straight-through passage for liquids or gases when open and a reliable seal when closed. This component from manufacturer Witeg is suited to assembly of custom glassware, distillation setups, gas lines and reaction systems where a conical ground joint stopcock of NS 18,8 is required. The hollow plug design reduces mass while maintaining mechanical stability. Net weight is 0,069 kg. Supplied as a single piece, it integrates readily into existing ground-joint assemblies and supports reproducible flow control in analytical and preparative laboratory work.
This article is part of Stopcocks & valves, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Joint size: NS 18,8
- Plug dimensions: 10 × 110 mm
- Bore: 4 mm
- Plug type: hollow NS glass plug
- Standard: DIN 12545
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Questions about Stopcock, Schiff, ST 18,8
What is this article?
Stopcock, Schiff, ST 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.