The type 671 was designed for working pressures up to 40 bar and can be easily installed between standardised flanges according to DIN EN 1092-1, making it ideal for retrofits in existing systems, even in confined spaces.
Even in larger nominal sizes, type 671 ensures operating pressures up to 20 bar, maintaining high reliability and full 360° visibility of the process fluid.
The standard version is equipped with borosilicate glass 3.3, in accordance with DIN ISO 3585, resistant to operating temperatures up to 280 °C.
This high-quality glass is distinguished by its exceptional thermal and chemical resistance, providing transparency and extended durability even under demanding conditions.
TECHNICAL DATA – Tubular Sight Glass Type 671
| Flange Material: | Stainless Steel (316 Ti) – 1.4571 Other alloys according to customer specifications |
| Form: | Tubular Sight Glass |
| Gaskets: | KlingerSil® C4400 PTFE, FKM, NBR, Silicone, EPDM, Graphite More than 50 other sealing materials available upon request |
| Nominal Size (DN): | DN10 to DN150 |
| Nominal Pressure (PN): | PN25 / PN40 |
| Temperature / Glass: | up to 280 °C with borosilicate glass 3.3 |
