Glass consultant for rectangular sight glasses according to and similar to DIN 7081
Rectangular sight glasses made of borosilicate glass according to and similar to DIN7081 are suitable for temperatures up to 243°C and up to 320°C protected by ACI mica shields. Depending on the geometry and design (transparent or reflective glass), rectangular sight glasses made of borosilicate glass can be used for very high pressures. We will be happy to help you select the right glass for your application. Feel free to contact us for this.
Standard sight glasses according to DIN 7080 can be found in our brochure.
Subject to technical changes and calculation errors.
Technical features
Water resistance according to DIN 12111 (ISO 719) Hydrolysis class 4
Acid resistance according to DIN 12116 Acid class 1
Alkali resistance according to DIN 52322 Alkali class 2
Bending tensile strength up to 150 N/mm² / 21,000 psi
Surface pressure tension ≥ 100-140 N/mm² / 14.500-20.000 psi
Paralellity ≤ 0.20 mm / 0.008 inches
T.W.B. Δ T 265 K
max. operating temperature 300 °C / 572 °F (short-term)
ACI Mica resistant 320 °C / 608 °F
Operating conditions | maximum allowable working pressure | maximum allowable temperature | ||
bar | psi | °C | °F | |
Transparent sight glasses without ACI mica shield protection for saturated steam or hot water pressure | 35 | 500 | 243 | 470 |
Transparent sight glasses protected with ACI mica shield for saturated steam or hot water pressure | 103 | 1.500 | 320 | 608 |
Reflex sight glasses for saturated steam or hot water pressure | 35 | 500 | 243 | 470 |
Reflex sight glasses for use without steam and without technically significant glass attack | 280 | 4.000 | 38 | 100 |
Transparent sight glasses when using media without technically significant glass attack | 345 | 5.000 | 38 | 100 |
High pressure transparent sight glasses in special fittings | 414 | 6.000 | 38 | 100 |
Dimensional tolerances on request