Overview
High Temperature High Pressure Boiler Level Gauge Glass Plate: a sight / viewing glass made from High Pyrex Borosilicate Glass 3.3. Listed geometry: size Od From 50mm to 500mm, reducing shape. Optical / electrical data: transmittance ≥91%, sheet resistance Customizable per size. Temperature 450ºC. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.
Specifications
| Material | High Pyrex Borosilicate Glass 3.3 |
|---|---|
| Type | Plain sight glass / Reflex grooved sight glass |
| Shape | Reducing |
| Size | Od From 50mm to 500mm |
| Head Code | Square |
| Connection | Female |
| Item | High Pressure Boiler Level Gauge Glass Plate |
| Process | Cut, Polish, Ground, Tempered |
| Property 1 | Borosilicate Heat Resistant |
| Shipment | by Sea, by Air, by Courier |
| Custom Design | Logo Printing |
| Molding Process | High temperature integrated hot pressing |
| Thermal expansion coefficient | 3.3×10 K¹ |
| Max continuous working temperature | 450ºC |
| Rated pressure resistance | Customizable per size |
| Light transmittance | ≥91% |
| Common standard sizes (Length×Width×Thickness) | 115×34×17mm, 140×34×17mm, 165×34×17mm, 215×34×17mm |
| Edge treatment | Smooth pressed edge, no sharp cuts |
| Characteristic | Pressure resistant, thermal shock resistant, anti-corrosion, reflex optical design optional |
| Temperature resistance | Long working temperature ≤ 450 ° C, short time working ≤ 500 ° C |
| Light transmission rate | 95% up |
| Hydraulic Water-resistant strength | More than test 40Kgf/cm ² |
| Thermal stability | T300 ° C |
| Linear expansion coefficient (0-300 ° C) | 3.3 × 10-7 K-1 |
| Softening temperature | 820° C |
| Supplier | Jinan Honhai Glass Company Limited |
What to specify when you request a quote
- Glass type and thickness — listed as “High Pyrex Borosilicate Glass 3.3”; name the glass and thickness.
- Temperature and pressure — listed as “3.3×10 K¹”; give working temperature, thermal shock and any pressure rating.
- Strengthening and safety — listed as “More than test 40Kgf/cm ²”; state tempering, lamination or the safety standard.
- Outline and edges — listed as “Reducing”; send a drawing with outline, holes and edge finish.
Engineering guides for this part
For material grades and coating options, see Custom Borosilicate Glass Sheets Cut to Size: Precision and Performance. How parts like this are machined and finished is covered in Custom Special-Shaped Glass Machining: Boosting B2B Output & Quality. For an application example, read Quartz Glass Windows for High-Temperature Appliance Modules. Before sending a drawing, check Quartz Glass Manufacturing: Controlling Thermal Conductivity in Fused Silica. A related standard product is Custom Special-Shaped Glass Plate.
