Catalog
Circular Sight Glass — Tempered Borosilicate DIN 7080
Our tempered borosilicate circular sight glasses are engineered for durability and resistance to high temperatures and chemicals. These glasses are made using 3.3 borosilicate glass and manufactured in accordance with international norm DIN7080 (which guarantees quality and reliability).
This standard ensures the glasses can withstand harsh conditions, such as significant pressure and thermal shocks, making them ideal for use in demanding environments like chemical processing and high-pressure steam systems.
The tempering process enhances their strength and ensures the glass meets the highest quality standards. Our tempered borosilicate sight glasses offer a safe and reliable option for process monitoring across a variety of industrial applications.
Specifications
| Glass Type | 3.3 Borosilicate |
|---|---|
| Maximum Diameter | 350mm |
| Minimum Thickness | 3mm |
| Maximum Thickness | 38mm |
| Max Short-term Temperature | 560°C (1040°F) |
| Thermal Shock Resistance | 140 K |
| Max Working Pressure | Refer to table below |
| Acid Resistance | Class S1 (ISO 1776) |
| Alkaline Resistance | Class A2 (ISO 695) |
| B₂O₃ | Minimum 13% content |
| Na₂O + K₂O | Minimum 4.5% content |
.webp)
TOLERANCES
| TOLERANCES |
|---|
| DIAMETER (d) |
Specifications
| 10 ≤ t ≤ 20mm | 20mm < t |
|---|---|
| + 0.5mm | + 0.8mm |
| - 0.25mm | - 0.4mm |
Pressure resistance for tempered borosilicate glass is determined by several factors including the overall diameter of the glass, the visible (or unsupported) diameter of the glass and the thickness of the glass. Refer to the chart below for some commonly used sizes and their respective maximum recommended pressure ratings.
Specifications
| d1 | Total glass diameter |
|---|---|
| d2 | Visible glass diameter |
| ρ | Pressure in BAR |
| δ | Safety factor (5 recommended) |
| σ | Surface compressive stress (70N/mm2) |
