Description
Stopper with valve stopcock NS 19/26 is a laboratory glassware fitting that incorporates a standard ground joint of NS 19/26 together with a valve stopcock and a lateral olive. This configuration allows controlled flow regulation while offering a side connection point via the olive for tubing or additional apparatus. Supplied as one piece with a net weight of 0,022 kg and identical gross weight, the stopper is designed for integration into glass assemblies used in chemical laboratories. It supports sealing, fluid handling and gas management tasks in setups such as reaction vessels, distillation systems and transfer lines. The product is manufactured by Witeg and falls within the range of transition pieces and normschliff components commonly employed with standard ground-joint glassware. Its NS 19/26 joint size guarantees interchangeability with matching laboratory equipment, simplifying assembly and replacement. The combination of valve stopcock and lateral olive provides practical versatility for workflows that require both adjustable flow control and a secondary side connection. Originating from Germany, this compact unit serves research and analytical environments needing reliable stopcock-equipped stoppers for everyday experimental work.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Product type: Stopper with valve stopcock
- Joint size: NS 19/26
- Connection: Lateral olive
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Questions about Suction tube, with needle valve stopcoc
What is this article?
Suction tube, with needle valve stopcoc is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Ground-joint glass stoppers, inside Stoppers, caps & closures, in Labware.
A ground-glass stopper matches a ground neck of a stated joint size. A 14/23 stopper does not seal a 29/32 neck. The stopper is part of the flask's seal, and a chip on the grind is a leak.
A closure is the part that decides whether a bottle stays shut and whether the contents attack the seal. A ground-glass stopper matches a ground neck. A screw cap needs the right thread and a liner that survives the liquid. Rubber and silicone stoppers push into a mouth. The liner, not the colour of the cap, is the chemical choice. The vessels they close are indexed under ISO laboratory glassware.
Which category should I open next?
The category is Stoppers, caps & closures. The sub-category is Ground-joint glass stoppers. The catalogue is Labware.
Shelves beside this one are Screw caps & closures, Rubber & silicone stoppers, Lids & seals and Closures (other).
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.