Product type: Fireproof Glass. Application: Door, Window. Model: 9189. Function: Optical Function, Thermal Function.
Overview
Borosilicate 3.3 Glass Sheet DIN7080 Sight Glass Disc for Reaction Kettle: a sight / viewing glass made from Borosilicate 3.3 (Borofloat type), low thermal expansion coefficient. Listed geometry: thickness 0.5-25mm, plate shape. Typical applications: Home Appliance. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.
Specifications
| Material | Borosilicate 3.3 (Borofloat type), low thermal expansion coefficient |
|---|---|
| Type | Fireproof Glass |
| Shape | Plate |
| Thickness | 0.5-25mm |
| Application | Home Appliance |
| Usage | Door, Window |
| Model NO. | 9189 |
| Structure | Solid |
| Moh's Hardness | 10 |
| Function | Optical Function, Thermal Function |
| Transparency | Transparent |
| Processing Method | Float Processing |
| Preparation Process | Float Processing |
| Color | Tranparent |
| Materials | Borosilicate |
| Processing | Customized |
| Long time (>10h) | 500℃ |
| Stock size | 1150*850mm /1700*1150mm |
| Supplier | Jinan Everest Glass Company Limited. |
Technical data
| Density (25℃) ρ | 2.23±0.02g/cm3 |
|---|---|
| Modulus of elasticity | 68kN/mm2 |
| Co-efficient of expansion(20-300℃) | 3.3±0.1×10-6 |
|---|---|
| Softening point | 820±10℃ |
| Strain point | 516±10℃ |
| Heat conductivity at 90℃ | 1.2W/mk |
| Caloricity | (20-100℃) 0.82KJ × (kg×K)-1 |
| Thermal shock resistanceStrengthening type | 180K300K |
| Identical temperature differenceStrengthening type | 100K300 K |
| Maximum working temperatureShort time (<10h):Long time (>10h): | 500℃450℃ |
| Water resistance | ISO719/DIN12111 HGB1ISO720 HGA1 |
|---|---|
| Acid resistance | ISO1776/DIN12116 1 |
| Alkali resistance | ISO695/DIN52322 A2 |
What to specify when you request a quote
- Glass type and thickness — listed as “Borosilicate 3.3 (Borofloat type), low thermal expansion coefficient”; name the glass and thickness.
- Temperature and pressure — give working temperature, thermal shock and any pressure rating.
- Strengthening and safety — state tempering, lamination or the safety standard.
- Outline and edges — listed as “Plate”; send a drawing with outline, holes and edge finish.
Engineering guides for this part
For material grades and coating options, see Borofloat 33 Glass: Material Selection for Precision Substrates. How parts like this are machined and finished is covered in Glass Wafer Coring for Custom Circular Components. For an application example, read Quartz Glass Windows for High-Temperature Appliance Modules. Before sending a drawing, check Thermal Conductivity of Quartz Glass & Fused Quartz: A Process Guide. A related standard product is BF33 Microfluidic Glass Chip for Rapid Testing.
