Robust sight glasses for flow control with flange or threaded connection.
The NORIS flow sight glasses types 880 and 881 enable reliable visual monitoring of filling and flow in pipelines. It is ideal for monitoring processes in industrial plants, heating and cooling circuits and chemical applications. Thanks to the standard drip tip, even the smallest flow is visible.
| Feature | Type 880 | Type 881 |
| Connection | Flange DIN | Female thread G (BSP) or NPT |
| Nominal pressure | PN16 / PN25 / PN40 | PN16 / PN25 / PN40 |
| Nominal size | DN 15 – DN 250 | G ¼” to 2″ |
| Temperature range | up to 150°C / 280°C | up to 150°C / 280°C |
| Body | GG25 / GS-C25 / stainless steel 1.4408 | GG25 / GS-C25 / Stainless steel 1.4408 |
| Glass | Borosilicate glass DIN 7080 | Borosilicate glass DIN 7080 |
| Installation position | Drip nose for smallest flow rates | Compact design for threaded connection |
Sight glasses are indispensable components for process monitoring in modular SKID systems. They enable the direct visual inspection of flow, fill level and media quality in pipes and containers – a decisive factor for operational safety and quality assurance.
Liquids and gases that do not attack the materials.
Yes, heating jacket and leakage jacket are available as special versions.
DIN 3237, EN 1092, Pressure Equipment Directive 2014/68/EU.
Yes, stainless steel versions are available.
Yes, observe flow direction.
Our insulations are more than just accessories – they perfectly complement fittings and systems and increase efficiency, safety and adaptability.
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