Flow indicator for steam/condensate with borosilicate glass and optional heating jacket.
The GESTRA sight glass Vaposkop® type VK serves for visual monitoring of flow processes in pipelines, particularly upstream of steam traps. It permits the detection of steam losses or condensate backup and thus contributes to operational reliability and energy efficiency. The devices are robust, maintenance-free and suitable for use in potentially explosive areas.
The pH value decides the series: the VK 14 is approved for media up to pH 9, the VK 16 up to pH 10 – borosilicate glass is attacked by alkalis. From 300 °C mica discs must be provided.
| Feature | VK14 | VK16 |
| Nominal pressure | PN16 | PN40 / ASME CL150 / CL300 |
| Nominal size | DN 15 – DN 50 | DN 15 – DN 50 |
| Temperature range | -10°C to +280°C (optional 300°C) | -10°C to +300°C |
| Body | Cast iron / cast steel | Cast steel / stainless steel |
| Glass | Borosilicate glass DIN 7080 | Borosilicate glass DIN 7080 |
| Installation position | Drip tip, optional mica disks | For higher pressures and pH values |
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.
Steam and condensate, media of fluid group 2.
Yes, with mica disks up to 300°C.
EN 1092, ASME B16.5, Pressure Equipment Directive 2014/68/EU.
Yes, according to ATEX directive (no ignition source).
Yes, horizontal or vertical (note direction of flow).
Our insulations are more than just accessories – they perfectly complement valves and systems and increase efficiency, safety and adaptability.
Order and configure now.
We offer:
