Beschrijving
Burette valve stopcock, brown is a precision laboratory stopcock for controlled liquid delivery in volumetric and titration work. The body is made of brown glass and uses a lateral layout with an integrated PTFE spindle that gives smooth adjustment and broad chemical resistance. Bore is adjustable from 0 to 2,5 mm, so flow can be fine-tuned to the needs of the analytical method. Supplied as a single piece with a net weight of 0,03 kg, the fitting is ready for installation on compatible burette systems used in chemical, pharmaceutical, environmental and teaching laboratories. Brown glass offers useful protection for light-sensitive reagents, while the PTFE spindle maintains a reliable seal and reduces seizing during repeated use. This burette valve stopcock from manufacturer Witeg is a practical choice when assembling or servicing glass burettes that require reproducible flow control. Its design follows standard laboratory stopcock practice and supports accurate volumetric measurements in routine quality-control and research applications.
This article is part of Burettes, in Volumetric glassware.
Key features
- Pack size: 1 pc
- Material: Brown glass
- Spindle material: PTFE
- Configuration: Lateral
- Bore: 0–2,5 mm
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Questions about Valve for burettes, amber glass
What is this article?
Valve for burettes, amber glass is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Burettes, inside Volumetric glassware, in Labmateriaal.
A burette delivers a measured volume through a stopcock, which is how a titration is read. Class A and class AS state the tolerance. The stopcock, glass or PTFE, and the volume of the burette are the choices. A dirty bore changes the delivered volume.
Volumetric glassware is glass that has been calibrated to contain or to deliver one stated volume at a reference temperature. That calibration is the whole point. Class A and class AS have a tighter tolerance than class B. A volumetric flask contains. A pipette and a burette deliver. A measuring cylinder is the coarser reading, used when the volume is not the result. The classes sit under ISO laboratory glassware. The chain back to the unit of volume is the work of the BIPM and of NIST.
Which category should I open next?
The category is Volumetric glassware. The sub-category is Burettes. The catalogue is Labmateriaal.
Shelves beside this one are Volumetric flasks, Measuring cylinders, Mixing cylinders and Volumetric accessories & certificates.
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.