Two neck round bottom flasks with central neck and angled side neck

Made of Pyrex/Duran borosilicate glass

Two-neck round-bottom flasks made of borosilicate glass, with a central neck and an angled side neck, both fitted with standard ground joints, designed for laboratory applications requiring greater versatility when connecting components and accessories.

The spherical bottom promotes uniform heat distribution, making these flasks particularly suitable for controlled heating, mixing, distillation, synthesis, chemical reactions, and solution preparation. Borosilicate glass provides high thermal and chemical resistance, good resistance to thermal shock, and excellent visibility of the contents.

The two-neck configuration allows multiple accessories to be used simultaneously without interrupting the experimental setup. The central neck can be used, for example, to connect condensers, stirrers, or distillation systems, while the angled side neck allows the insertion of thermometers, probes, dropping funnels, adapters, or gas and vacuum lines.

The standard NS joints ensure compatibility with a wide range of glass components and facilitate the assembly of modular apparatus, including complex experimental configurations.

Available in different capacities and with various combinations of NS joints, two-neck round-bottom flasks are suitable for chemical, pharmaceutical, university, research, and quality-control laboratories.

Scientific blown glassware is manufactured through hot working of borosilicate glass, a material particularly suited to laboratory applications due to its high thermal and chemical resistance and excellent resistance to thermal shock. Shaping is carried out by localized flame heating, controlled rotation of the glass, and air blowing to obtain precise geometries, uniform wall thickness, and smooth transitions with minimal internal stress.

The main processing techniques include blowing, drawing, constriction, expansion, glass-to-glass sealing, and the manufacture of standard ground joints, connectors, hose connections, stopcocks, and special fittings. Particular attention is paid to concentricity, wall thickness uniformity, and the continuity of welded joints, all of which are essential for reliable performance during heating, vacuum operation, and fluid transfer.

After forming, the glassware undergoes controlled annealing to reduce internal stresses generated during hot working. This process improves mechanical stability and resistance to thermal shock, making the glassware suitable for both standard laboratory applications and custom-designed experimental systems.

Two-neck round-bottom flasks, with central neck and angled side neck

Made of Pyrex/Duran borosilicate glass