Description
Three-necked round-bottom flask DURAN® is a large-capacity laboratory vessel intended for multi-port reaction, distillation and preparative work. With a nominal volume of 20000 ml it provides ample working space for pilot-scale and bulk laboratory procedures. The centre neck is finished as a 45/40 ground joint and the two side necks as 29/32 joints, allowing simultaneous attachment of condensers, dropping funnels, thermometers, gas inlets or mechanical stirrers. Fabricated from DURAN® borosilicate glass by manufacturer Lenz, the flask combines thermal shock resistance with broad chemical durability under typical laboratory heating and cooling regimes. The classic round-bottom geometry promotes uniform heat transfer when used with heating mantles or oil baths and supports efficient mixing. Supplied as a single piece with a weight of 5,140 kg, this three-neck flask integrates readily into standard ground-joint glassware assemblies and is suited to synthetic, process-development and large-batch applications that require robust multi-neck access and reliable joint compatibility.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Product type: Three-necked round-bottom flask
- Material: DURAN®
- Capacity: 20000 ml
- Centre neck: 45/40
- Side necks: 29/32
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Questions about Three-necked round-bottom flask, DURAN®, 20000ml, side necks 29/32
What is this article?
Three-necked round-bottom flask, DURAN®, 20000ml, side necks 29/32 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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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.