Straight stopcocks with needle valve
Made of borosilicate glass
Straight stopcocks made of borosilicate glass with needle valve, designed for fine and controlled regulation of gas or liquid flow in laboratory apparatus.
The needle valve allows progressive and precise flow adjustment, making these stopcocks particularly suitable for applications requiring accurate flow control.
The borosilicate glass body provides good chemical and thermal resistance, while the straight configuration facilitates integration into laboratory lines, circuits, and experimental apparatus.
To order
| Code | Description |
| GS/010/602 | Straight stopcocks with needle valve Ø bore 0÷3 mm |
Scientific blown glassware is manufactured through hot working of borosilicate glass, a material particularly suitable for 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 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, fittings, hose connections, stopcocks, and special connections. 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 experimental configurations.