Description
1-Way stopcock polished NS14 with 4,0 mm bore is a precision glass laboratory valve for controlled flow regulation in chemical and analytical setups. It combines a polished ground joint NS 14,5 with a PTFE plug and bent tube ends, giving a reliable seal and smooth operation when handling liquids or gases in distillation, titration and vacuum assemblies. The defined 4,0 mm bore supports consistent throughput while the polished finish helps maintain tight joints and low leakage risk during routine work. Supplied as a single piece with a net weight of 0,05 kg, the stopcock integrates readily into standard laboratory glass systems. This component from manufacturer Witeg is suited to research, quality-control and teaching laboratories that need dependable one-way shut-off and flow control. Typical uses include conical stopcock positions, general valve duties and flexible connection of glassware via the bent tube ends. Durable construction and the chemical resistance of the PTFE plug make it practical for everyday laboratory service.
This article is part of Stopcocks & valves, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Type: 1-way stopcock polished
- Joint size: NS 14,5
- Bore: 4,0 mm
- Plug material: PTFE
- Connections: Bent tube ends
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Questions about stopcock ST 14
What is this article?
stopcock ST 14 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.