Description
Angle stopcock according to Schiff NS 21,5 is a precision glass laboratory valve engineered for controlled directional flow in chemical glassware systems. Equipped with an NS 21,5 ground joint and a hollow NS glass plug of 13 × 120 mm with a 6,3 mm bore, it meets DIN 12545 requirements for reliable conical sealing. The angled configuration enables space-saving installation in vacuum manifolds, distillation apparatus and reaction setups where flow direction must change without extra adapters. Offered as one piece with a net weight of 0,095 kg, the stopcock is ready for immediate incorporation into standard joint assemblies. Manufactured by Witeg, the hollow-plug construction permits smooth operation and dependable sealing once greased. Glass material provides broad chemical resistance to common organic solvents, aqueous solutions and laboratory reagents. Suitable for organic synthesis, analytical chemistry and general fluid handling, this Schiff-type angle stopcock delivers durable, reusable performance in research and quality-control environments that demand leak-tight, modular glass connections.
This article is part of Stopcocks & valves, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Joint size: NS 21,5
- Plug dimensions: 13 x 120 mm
- Bore diameter: 6,3 mm
- Standard: DIN 12545
- Design: Angle stopcock with hollow NS glass plug
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Questions about Angled stopcock, Schiff, ST 21,5
What is this article?
Angled stopcock, Schiff, ST 21,5 is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Stopcocks & valves, inside Tubing, hoses & fittings, in Matériel de laboratoire.
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 Matériel de laboratoire.
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.
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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.