Description
DURAN® flat flange bell jar with knob is a precision laboratory glassware item for vacuum work and underpressure experiments. Made from borosilicate glass 3.3, the jar has a diameter of 315 mm and incorporates a practical knob that allows simple, secure lifting. Standard laboratory trials often run at ambient pressure, yet conducting reactions under vacuum in the rough and fine vacuum range can markedly alter reaction behaviour; a vacuum experiment plate together with this flat flange bell jar (also called an air-pump bell) makes such studies possible. A permanently fired white print ensures durable, long-lasting identification. Typical uses include vacuum applications and experiments inside underpressure chambers. The single-piece unit has a net weight of 6 kg and a gross weight of 6,85 kg. This robust glassware from manufacturer Duran/DWK Life Sciences provides a reliable enclosure for controlled low-pressure laboratory setups and supports reproducible vacuum experimentation.
This article is part of Reaction vessels & jacketed vessels, in Beakers & flasks.
Key features
- Pack size: 1 pc
- Storage temperature: Standard
- Material: Borosilicate glass 3.3
- Diameter: 315 mm
- Design: With knob for easy lifting
- EAN: 4032051030657
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Questions about DURAN® Bell Jar, with glass knob top
What is this article?
DURAN® Bell Jar, with glass knob top is the article on this page. Luminix Health distributes DWK Life Sciences for laboratory use. It sits in Reaction vessels & jacketed vessels, inside Beakers & flasks, in Labware.
A reaction vessel is the flask a synthesis actually runs in, sometimes jacketed so a fluid can heat or cool the wall. The joints, the working volume and the jacket connections are the specification. It is not a storage bottle.
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 Reaction vessels & jacketed vessels. The catalogue is Labware.
Shelves beside this one are Round-bottom flasks, Beakers, Erlenmeyer flasks, Flat-bottom flasks, Flasks (other) and Beaker & flask accessories.
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.

