Flow indicators are devices used in piping systems to provide a visual indication of the flow of liquids, gases, or slurries within the system. They are crucial for monitoring and verifying the flow and condition of the medium without interrupting the process.
The double window flow indicator allows for a greater number of configurations in terms of gasket types and sight glass options, enabling higher usage parameters for pressure ratings and high-temperature applications.
Flow Indicators – HP Model
The Iniflu HP double window flow indicator features a one-piece forged body, providing increased strength and durability. Additionally, the flanges are welded to the ends of the forged pipes, allowing this model to offer a specific flange type for each application.
Add-ons to Enhance Flow Visibility
These visual flow indicators may include additional features to help users gain a clearer view of the process.
Full View
Designed for easily visible fluids with color, turbulence, and clarity. They readily detect the presence of solids or foreign substances in the handled fluid and can be mounted in any position.
Flapper
Internally mounted with a PTFE flapper that indicates the flow direction. It is used for clear fluids that are difficult to observe and is typically mounted horizontally (can only be mounted vertically if the fluid flows upward).
Drip
Allows the formation of drops for low-volume or intermittent fluids, such as in unit distillation operations. These are mounted only in a vertical position for downward flows.
Spinner
Internally mounted with a PTFE spinner that rotates with fluid flow, greatly enhancing visibility for dark, translucent, and clear fluids that are hard to observe with the naked eye. They can be interchangeably mounted in any horizontal or vertical position.


Item | Part name | Material options |
---|---|---|
1 | Bolts | Stainless Steel 316L HSS |
2 | Covers | Stainless Steel 304 Carbon Steel w/ coating |
3 | Gaskets | Graphite Neoprene Teflon Sanitary Rubber EPDM Viton |
4 | Sight Glass | Tempered Borosilicate Tempered Soda Lime Quartz |
5 | Body | Staineless Steel 316L Stainless Steel 304 Carbon Steel w/ coating |

Double Window Sight Glass – Technical Information | |||||
---|---|---|---|---|---|
Measure | 1″ | 1 – 1/2″ | 2″ | ||
A (Dist between faces) | 7″ (177.8 mm) | 8″ (203.2 mm) | 9″ (228.6 mm) | ||
B (Dist between caps) | 5″ (127.0 mm) | 5.5″ (139.7 mm) | 5.5″ (139.7 mm) | ||
C (Visible process) | 2″ (50.8 mm) | 2.5″ (63.5 mm) | 3″ (76.2 mm) | ||
D (Caps diameter) | 4″ (101.6 mm) | 4.5″ (114.3 mm) | 5″ (127.0 mm) | ||
Glass (Total Diameter) | 2.5″ (63.5 mm) | 3″ (76.2 mm) | 3.5″ (88.9 mm) | ||
Glass (Glass thickness) | 5/8″ (15.87 mm) | 5/8″ (15.87 mm) | 5/8″ (15.87 mm) |
The Iniflu Flanged Flow Indicator is the ideal solution for efficient monitoring of liquids in industrial systems. Its double-window design provides a clear and precise view of the flow, enabling real-time monitoring. Manufactured with high-quality materials, it ensures durability and resilience, even in demanding environments. This indicator is perfect for applications that require a reliable and safe flow sight glass.
Discover a wide range of solutions designed to optimize flow monitoring in your industrial applications. Our products stand out for their durability, versatility, and precision, making them the ideal choice for demanding environments.