Description
Cone NS 34/35 DURAN is a precision ground-glass joint cone manufactured to DIN 12249 from DURAN tubing. The component features an outer diameter (A-Ø) of 30 mm, an overall length of 150 mm and a wall thickness of 2,0 mm, making it suitable for assembling standardised laboratory glassware systems. Produced in borosilicate glass 3.3, the cone offers the thermal and chemical resistance expected of DURAN® quality glassware for everyday laboratory work. This joint size NS 34/35 from manufacturer Witeg integrates cleanly with matching sockets and adapters in distillation, reaction and vacuum setups. Supplied as a single piece, it supports modular apparatus construction where a reliable, reusable conical ground joint is required. The defined geometry and robust wall ensure stable sealing and mechanical strength during repeated assembly and thermal cycling in research and routine analytical laboratories.
This article is part of Distillation heads, adapters & columns, in Distillation & extraction glassware.
Key features
- Pack size: 1 pc
- Product type: Ground joint cone
- Joint size: NS 34/35
- Material: Borosilicate glass 3.3
- Standard: DIN 12249
- Outer diameter: 30 mm
Recently viewed
You may also like
Browse related categories
Category
Distillation & extraction glassware
Sub-category
Distillation heads, adapters & columns
Catalogue
Brand
Questions about ST-cone ST34/35 Duran
What is this article?
ST-cone ST34/35 Duran is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Distillation heads, adapters & columns, inside Distillation & extraction glassware, in Labware.
A still head, an adapter or a column is the glass between the boiling flask and the condenser. A Vigreux or packed column gives the vapour a surface so a closer-boiling mixture can separate. The joint sizes at both ends have to match the flask and the condenser.
Distillation separates liquids by boiling point. A condenser turns the vapour back into liquid: Liebig, coil and cold-finger shapes differ in how much cooling surface they offer. A still head and a column sit between the flask and the condenser. A Soxhlet extractor washes a solid again and again with the same solvent. Ground joints have a standard size, and the joint, not the flask, is what has to match. The pieces are indexed under ISO laboratory glassware.
Which category should I open next?
The category is Distillation & extraction glassware. The sub-category is Distillation heads, adapters & columns. The catalogue is Labware.
Shelves beside this one are Condensers, Ground-joint glassware (other) and Soxhlet & extraction apparatus.
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.