Products
GLASS BALLS
SODA-LIME GLASS (CRYSTAL GLASS)
Material resistant to high alkaline solutions. Soda-lime glass balls are mainly used for applications not subjected to strong mechanical or thermal shocks, such as plastic bearings, flow meters, measurement and control equipment, instruments and ink cartridges.
BOROSILICATE GLASS (DURAN-PYREX)
Due to its excellent chemical inertia to most acids, this kind of glass is particularly suitable for metering pumps and valves against strong oxidising concentrations.
BLACK GLASS
A kind of glass often used for medical and chemical flow meters and for general measurement and control instruments.
| CHEMICAL COMPOSITION %: | ||||||
| MATERIAL | SiO2 | Na2O | CaO | AI2O3 | A2O3 | MgO |
| SODA-LIMA GLASS | 67 | 16 | 7 | 5 | 3 | 2 |
| BOROSILICATE GLASS (PYREX) | 81 | 4 | - | 2 | 13 | - |
| BLACK GLASS | 69,7 | 15,2 | 3,4 | - | 1,3 | - |
| PROPERTIES | SODA-LIME GLASS | BOROSILICATE GLASS | BLACK GLASS |
| SPECIFIC WEIGHT | 2,50 | 2,23 | 2,55 |
| HARDNESS (KNOOP-KHN) | 465 | 418 | 405 |
| MELTING POINT °C | 695 | 820 | 650 |
| MAX TEMPERATURE USE (MECHANICAL) | |||
| NORMAL °C | 110 | 230 | 110 |
| EXTREME °C | 460 | 490 | 380 |
| RESISTANCE TO THERMAL STRESS | 17 °C | 53 °C | 18 °C |