Double Window Sight Glasses are designed for direct visual observation of process flow in industrial pipelines.
The two opposed viewing windows allow operators to confirm the presence, condition and movement of the process medium without interrupting the line. The design is suitable for liquid and gas service across a wide range of industrial applications.
Available in sizes from 15 NB to 150 NB, with design pressure up to 15 barg and temperature up to 350°C, the unit can be supplied in carbon steel or stainless-steel body materials with toughened borosilicate glass for reliable viewing. It is suitable for process, utility, cooling-water, chemical and circulation-line monitoring where simple visual confirmation of flow is required.
How it works
Working Principle
The process medium flows through a chamber between two opposed transparent windows. Ambient or back lighting passes through the chamber so an operator can directly observe flow presence, colour, clarity and entrained material.
01
Process enters the chamber
Liquid or gas continues through the inline sight-glass body without opening the pipeline.
02
Windows provide visibility
Opposed toughened-glass windows allow the process to be viewed from either side and back-lit when required.
03
Operator inspects condition
Flow presence and visible process condition are checked directly; the device provides observation rather than a calibrated flow-rate output.
At a glance
Key Highlights
Double-window design for direct visual flow observation
Suitable for liquid and gas service
Line sizes from 15 NB to 150 NB
Design pressure up to 15 barg
Design temperature up to 350°C
Carbon steel and stainless steel body options
Range summary
Technical Specifications
Values below summarise the product family. Open an individual product for its complete model and variant data.
Type
Double Window Sight Glass
Line Size
15 NB to 150 NB
Design Pressure
Up to 15 barg
Design Temperature
Up to 350°C
Body MOC
A216 WCB / CF8 / CF8M / CF3 / CF3M
Sight Glass
Toughened borosilicate glass
Viewing Arrangement
Two opposed windows for direct visual flow observation
Typical use
Applications
Visual flow confirmation in process pipelines
Liquid and gas flow observation
Cooling-water and utility line monitoring
Chemical and process industry applications
Pump discharge and circulation line monitoring
Steam-condensate and process-fluid observation
Selection confidence
Why Choose Kuncham Controls?
Direct process visibility
The operator can inspect flow presence, colour and condition without interrupting the line.
Double-window viewing
Opposed windows provide clear direct visual observation of the process medium.
Industrial construction
Carbon-steel and stainless-steel body grades can be selected for compatible process media.
Simple visual confirmation
The device provides immediate visual flow confirmation without requiring electrical power.
Support
Questions & Answers
Does a Double Window Sight Glass measure flow rate?
No. It provides direct visual indication of flow and process condition; it is not a calibrated quantitative flow meter.
Why are two windows used?
The two opposed windows provide clear direct observation of the process medium from the viewing chamber.
Which process media can be observed?
It is intended for compatible liquids or gases where visual confirmation of flow, colour or condition is useful.
Which line sizes are available?
The standard line-size range is 15 NB to 150 NB.
What information is needed for selection?
Provide the medium, line size, pressure, temperature, body material and viewing requirement.
