Two-way parallel stopcocks with glass plug
In borosilicate glass, for flow control and distribution
Two-way parallel stopcocks, with two diagonal bores, made of borosilicate glass and fitted with a glass plug, designed for the control and distribution of gas or liquid flow within laboratory lines and apparatus.
The configuration with two parallel connections allows multiple connections to be managed neatly on the same valve body, making these stopcocks particularly suitable for experimental setups, vacuum systems, and distribution lines.
Borosilicate glass provides high thermal and chemical resistance, as well as excellent transparency for visual monitoring of fluid flow. The glass plug ensures precise adjustment and reliable sealing, while the cylindrical connections facilitate integration with tubing, fittings, and other compatible components.
To order
| Code | Description |
| GS/010/801 | Two-way parallel stopcocks, NS 14.5, Ø bore 1.6 mm, connections Ø 8 mm, glass plug |
| GS/010/802 | Two-way parallel stopcocks, NS 18.8, Ø bore 2.5 mm, connections Ø 9 mm, glass plug |
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 thickness, 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.