Round flasks,DURAN®, transparent glass, 20000 ml, NS 45/40, 1 unit(s)

Round flasks fabricated from DURAN® transparent glass offer a 20000 ml capacity paired with an NS 45/40 ground joint for large-scale laboratory glassware assemblies. The transparent body enables clear visual assessment of contents throughout heating, distillation, and mixing steps, supporting safe handling of substantial liquid volumes. Delivered as one piece with a weight of 3,024 kg, the flask is dimensioned for preparative work, solvent management, and sample preparation tasks that exceed typical bench-scale volumes. Produced by Lenz, this DURAN® round flask is appropriate for distillation trains, Soxhlet-related apparatus, and environmental analysis workflows where a wide-bore NS 45/40 connection is preferred for efficient vapour and liquid transfer. The large joint size complements high-throughput condensers and adapters, helping reduce bottlenecks in vapour paths during reflux or recovery operations. Clear glass walls facilitate monitoring of boiling intensity, foam formation, and residue build-up without dismantling the setup. Laboratories engaged in bulk extraction, concentration, or intermediate holding of process liquids can integrate the vessel into existing ground-joint systems with minimal adaptation. Overall, the combination of high capacity, transparent DURAN® glass, and NS 45/40 geometry addresses demanding preparative and analytical applications that require robust, large-volume round flasks.

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 45/40
• Weight: 3,024 kg