Description
Round flasks in DURAN® transparent glass with a 20000 ml capacity and an NS 29/32 ground joint are intended for high-volume laboratory operations that still rely on a widely used joint size. The clear glass allows continuous observation of boiling, mixing, and phase behaviour, which is valuable during distillation, solvent recovery, and large-batch sample preparation. Each unit is supplied singly and has a weight of 3,024 kg, reflecting the substantial glass mass required for this volume. From manufacturer Lenz, the DURAN® flask combines optical clarity with the durability needed for repeated thermal cycling in preparative and analytical environments. The NS 29/32 joint interfaces with standard condensers, still heads, and adapters commonly found in distillation and Soxhlet-related assemblies, simplifying setup of multi-piece glass trains. Environmental analysis and sampling workflows that generate or process large liquid volumes benefit from the generous working space and transparent walls for visual control. The round-flask geometry supports even heating when used with appropriate baths or mantles, while the standardised joint helps maintain secure connections under reflux or reduced-pressure conditions. This configuration suits laboratories that need a transparent, large-capacity round flask with a conventional NS 29/32 interface.
This article is part of Round-bottom flasks, in Beakers & flasks.
Key features
- Pack size: 1 pc
- Product type: Round flask
- Material: DURAN® transparent glass
- Capacity: 20000 ml
- Ground joint: NS 29/32
- Weight: 3,024 kg
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Questions about Round flasks,DURAN®, transparent glass, 20000 ml, NS 29/32, 1 unit(s)
What is this article?
Round flasks,DURAN®, transparent glass, 20000 ml, NS 29/32, 1 unit(s) is the article on this page. Luminix Health distributes Lenz for laboratory use. It sits in Round-bottom flasks, inside Beakers & flasks, in Labware.
A round-bottom flask is the heating flask of a distillation or a reflux. The curved wall takes the heat, and the ground neck connects to a still head or a condenser. The joint size, not only the volume, has to match the rest of the set.
A beaker is an open working vessel: easy to pour, poor as a measure. An Erlenmeyer flask has a flat base and a conical wall so a liquid can be swirled without climbing out. A round-bottom flask is for heating under a condenser, because the heat meets a curved wall and the joint at the neck connects to the rest of the glassware. Borosilicate is the glass that survives the temperature change. These forms are listed under ISO laboratory glassware.
Which category should I open next?
The category is Beakers & flasks. The sub-category is Round-bottom flasks. The catalogue is Labware.
Shelves beside this one are Beakers, Erlenmeyer flasks, Reaction vessels & jacketed vessels, Flat-bottom flasks, Flasks (other) and Beaker & flask accessories.
What should I check before I order?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
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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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.