Tempered Soda Lime Sight Glass
Tempered soda lime circular sight glasses are designed for durability and impact resistance, widely used in less extreme industrial environments. Soda lime glass, after undergoing a tempering process, significantly increases its strength and resistance to physical shock, making it a cost-effective option for general applications.
OUR WARRANTY
100% Satisfaction Guarantee
Douglass warrants merchandise against defective workmanship and materials that become apparent within a period of 12 months from the date of receipt of invoice by the purchaser (hereinafter referred to as the warranty period). All liabilities under the warranty provisions shall expire when the warranty period has expired. Please feel free to contact us if you have any questions or comments.
SHIPPING AND PACKAGING
At Douglass, we use a unique and patented packaging method that minimizes the risk of glass damage during shipping. This system ensures your products arrive in perfect condition, just as we would like to receive them ourselves.
We understand that not all glass is the same, so we tailor our packaging techniques based on the type and quantity of products you order. This ensures maximum protection for every shipment.
Tempered soda lime circular sight glasses are designed for durability and impact resistance, widely used in less extreme industrial environments. Soda lime glass, after undergoing a tempering process, significantly increases its strength and resistance to physical shock, making it a cost-effective option for general applications. These glasses are particularly valued for their clear visibility and robustness, suitable for various applications including water treatment facilities, low-pressure vessels, and environmental monitoring equipment. Their circular shape allows for versatile installation and easy viewing, supporting safe and efficient process monitoring. While not as resistant to high temperatures and chemicals as quartz sight glasses, they offer a reliable and economical solution for a broad range of industrial needs.
Physical properties
| Property | Testing method | Obtained value |
|---|---|---|
| Thermic dilatation coefficient | ISO 7991 | 8.72 × 10⁻⁷ ºK |
| Density at 25°C | SN 7005 13 | 2.49 g/cm³ |
| Refractive index (λ = 587.6 nm) nd | — | 1.472 |
| Maximum annealing temperature | ISO 7884-8 | 1040 ºF |
| Short-term maximum temperature | ISO 7884-7 | 302 ºF |
| Thermal shock resistance | ISO 7884-3 | 33.67 ºF |
| Young's modulus | — | 63 150 MPa |
| Poisson constant | — | 0.2 |
| Thermal conductivity 20°C – 100°C λ | — | (1.2) (w·m⁻¹)(K⁻¹) |
| Photoelastic constant | DIN 52314 | (4.00 × 10⁻⁶) (mm²/N) |
| Specific electrical resistance 10⁸ Ωcm | DIN 52326 | 482 ºF |
| Dimensional tolerance diameter | DIN 7080 | PASS |
Optical properties
| Property | Testing method | Obtained value |
|---|---|---|
| Bubbles in glass | DIN 7080 | PASS |
| Chamfer tolerance | DIN 7080 | PASS |
| Viscous knots | DIN 7080 | PASS |
| Glass inclusions | DIN 7080 | Less than 0.2 mm |
Sight glass — DIN 7080
DIN established standard parameters for the manufacture of this type of glass, including pressure resistance relative to total and observable diameter and glass thickness, and permissible imperfections, chemical attack, markings, and dimensional tolerances.
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