WT Glass custom sizing oblong borosilicate sight glass, made from high-quality borosilicate glass, our sight glass excels in high-temperature resistance (up to 450°C), high-pressure durability, and superior chemical corrosion resistance. Ideal for industries like chemical, pharmaceutical, food, and energy, it ensures clear visibility and reliable performance in harsh environments.
| Material | Borosilicate Glass |
|---|---|
| Standard | DIN7081 |
| Size | 485mm x 70mm(W) xT 25mm, customize |
| Thickness | 25mm, customize can up to 85mm |
| Edge | Grind or Polish |
Length: 115-800mm;
Width: 30- 200mm
Thickness: normally 17mm; 20mm, 25mm can up to 85mm.
Edge: Grind or Polish
The largest size we have made is 750x150x25mm. Please see below photo for reference!
Please refer to below table for DIN7081 sizes.
| Glass Size (mm)
| Length l
| Thickness t
| Dimension “A” | Dimension “B” |
| Width b | Width b | |||
| 1 | 1151) | 17 | 30 | 34 |
| 2 | 140 | 17 | 30 | 34 |
| 3 | 165 | 17 | 30 | 34 |
| 4 | 190 | 17 | 30 | 34 |
| 5 | 2181) | 17 | 30 | 34 |
| 6 | 220 | 17 | 30 | 34 |
| 7 | 250 | 17 | 30 | 34 |
| 8 | 280 | 17 | 30 | 34 |
| 9 | 3001) | 17 | 30 | 34 |
| 10 | 320 | 17 | 30 | 34 |
| 11 | 340 | 17 | 30 | 34 |
| 12 | 370 | 17 | 30 | 34 |
| 13 | 400 | 17 | 30 | 34 |
1) – no DIN dimension!
General Tolerances:
| Limit deviations for | Width 30mm | Width 34mm | |
| Length ≤250 | Length>250 | Any length | |
| Length, l | ±0.8 | ±1.0 | 0, -1.5 |
| Width, b | ±0.8 | ±0.8 | +0.2, -0.8 |
| Thickness,t | ±0.5 | +1.5, -0.5 | ±0.5 |
Flatness (e):
l ≤165mm: 0.05mm
165mm < l ≤ 220mm: 0.08 mm
l > 220mm: 0.13mm
We recommend different materials according to your work temperature & work pressure, acid and alkali of the media requirements etc.
Soda-lime glass: widely available, cheap, working temperature up to 150 °C, DIN8902.
Borosilicate glass: particularly suitable for use in aggressive environments (acids, alkalis, water vapor), working temperature up to 350 °C, DIN7080.
Aluminosilicate glass: working temperature up to 660 °C.
Glass Ceramic: working temperature up to 750 °C.
Quartz glass: with a broad spectrum light transmittance (from ultraviolet to infrared), working temperature up to 1100 °C.
| Chemical Performance | |||||
| 1 | SiO2 | B2O3 | Na2O | Al2O3 | Fe2O3 |
| 80.3% | 13.04% | 4.17% | 2.44% | 0.027% | |
| 2 | Water resistance | ISO0719 I | |||
| 3 | Acid resistance | ISO0195 I | |||
| 4 | Alkali resistance | ISO0695 II | |||
| Mechanical Performance | |||||
| 5 | Density ρ | 2.2250g/cm3 @24℃ | |||
| 6 | Bending Strength | 150N/mm2 | |||
| 7 | Surface compressive stress | 90N/mm2 | |||
| 8 | Young’s modulus | 64 GPa | |||
| 9 | Poisson’s ratio | 0.2 | |||
| 10 | Hardness | 5.5 Mohs, (470 Knopp, 580 Vickers) | |||
| 11 | Elastic Modulus | 67KNmm-2 | |||
| Thermodynamic Performance | |||||
| 12 | Thermal Expansion Coefficient (0-300℃）(20-300) | ≤3.3*10-6K-1 | |||
| 13 | Softening Point | 820±10℃ | |||
| 14 | Strain Point | 520±10℃ | |||
| 15 | Annealing Point | 560±10℃ | |||
| 16 | Caloricity (20-100℃) | 0.83KJ* (kgxK)-1 | |||
| 17 | Thermal Coefficient | 1.2WxmxK-1 | |||
| 18 | Thermal Shock Resistance | 180K | |||
| 19 | Max Working Temperature | -70 up to 500℃ Short time (＜10h） | |||
| 20 | Max Working Temperature | -70 up to 280℃ Long time (＞10h） | |||
| Eletric Property | |||||
| 21 | Electric Volume Resistivity | 8.6×1013Ωxcm (at 25℃） 1.4×106Ωxcm (at 300℃） 1.4×10 6Ωxcm (at 300℃） | |||
| 22 | Dielectric Dissipation Fraction | 38×10-4 (at 1MHz, 20℃） | |||
| 23 | Dielectric Constant εr | 4.6 (at 1MHz, 20℃） | |||
| Optical Property | |||||
| 24 | Refractive Index | 1.4714 @24℃ | |||
WT GLASS specializes in the production of high-quality sight glass products. This Oblong Borosilicate Sight Glass is meticulously made to meet the demanding application requirements of the industrial sector.
Exceptional Performance for Extreme Environments:
–High Temperature Resistance: Made from premium borosilicate glass with an extremely low thermal expansion coefficient, it can withstand continuous high temperatures of up to 450°C and even higher transient temperatures. This ensures stable performance without deformation or cracking in high-temperature environments.
–High Pressure Resistance: Through special processing techniques, it possesses extremely high mechanical strength, capable of withstanding impacts and pressure in high-pressure environments, ensuring safe and reliable operation of equipment.
-Chemical Corrosion Resistance: Borosilicate glass has excellent resistance to chemical corrosion, capable of resisting erosion from acids, alkalis, salts, and other chemical substances, making it suitable for various corrosive media environments.
Wide Applications to Meet Diverse Needs:
-Chemical Industry: Used in reactors, pipelines, storage tanks, and other equipment to observe internal media reactions and ensure production safety.
-Pharmaceutical Industry: Used in bioreactors, filling lines, and other equipment to monitor production processes and ensure drug quality.
-Food Industry: Used in beverage, dairy, and other production lines to observe liquid flow states and ensure food safety and hygiene.
-Other Industries: Also applicable in power, metallurgy, environmental protection, and other fields to meet various viewing window needs.
Choosing Our Oblong Borosilicate Sight Glass, You Will Get:
High Quality: A strict quality control system ensures that every piece of glass meets international standards sich as DIN.
Long Service Life: Excellent high temperature, high pressure, and corrosion resistance extend service life and reduce maintenance costs.
Diverse Options: A variety of specifications, sizes, shapes and materials of sight glass are available to meet your personalized needs.
Professional Service: An experienced technical team provides professional product selection and technical support.
Contact us now to learn more about our products and get a customized quote!
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