Sight glass plates made of BOROFLOAT®
Product specification: Round sight glass plates, longitudinal sight glass plates
Material: BOROFLOAT® 33
You will find removal rates and further information on the glass in our info data sheet.
INFO Data sheet - Round sight glass plates made of BOROFLOAT® – (195.33 KB)BOROFLOAT® sight glasses are required wherever visual inspection of processes in vessels under pressure, thermal and chemical stress must be ensured.
Due to the very low coefficient of expansion common to BOROFLOAT® 33, it is characterised by high temperature resistance. In addition, it has excellent thermal shock resistance. BOROFLOAT® glass sheets are not thermally toughened (not hardened) and therefore offer significantly higher temperature application conditions.
Production and quality checks in the process sequence guarantee the property values of the glasses and the tight dimensional tolerances. With these excellent temperature properties, BOROFLOAT® sight glasses can be used for extreme conditions.
Operating conditions:
Temperature:
- 450 °C / 842 °F long-term
- 500 °C / 932 °F short-term (< 10 h)
Pressure: depending on diameter and thickness
Calculation of the pressure resistance: TOOL - Glass consultant Borofloat glass
Technical information:
Coefficient of expansion at 20 °C / 300 °C (68 °F / 572 °F) : 3,25 x 10–6 K–¹
Young's modulus: 64 kN/mm²
Thermal conductivity at 90 °C / 194 °F:1.2 W/(m·K)
Stress-optical coefficient K: 4,0 x 10–6 mm²/N-¹
Thermal shock resistance: 133 °C / 271,4 °F
Chemical resistance:
Water resistance DIN ISO 719/720: Hydrolysis class 1
Acid resistance DIN 12116: Acid class 1
Alkali resistance DIN 52332: Alkali class 2
