Three-way T-shaped stopcocks with glass plug
Made of borosilicate glass, for flow control and diversion
Scientific blown glassware is manufactured through the hot working of borosilicate glass, a material particularly well suited to laboratory applications due to its thermal and chemical resistance and its ability to withstand thermal shock. Shaping is carried out by localized flame heating, controlled rotation of the workpiece, and air blowing, allowing precise geometries, uniform wall thicknesses, and smooth connections with minimal internal stress.
The main processing techniques include blowing, drawing, constriction, expansion, glass-to-glass sealing, and the manufacture of standard ground joints, fittings, hose connections, stopcocks, and special connections. Particular attention is paid to concentricity, wall-thickness uniformity, and the continuity of sealed joints, all of which are essential to ensure 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 configurations.