Double window Sight Glass
Double Window Sight Glass allows for direct observation of the flow of liquid and gases within industrial pipelines. It consists of toughened borosilicate glass placed in between two process flanges to allow for clear viewing of the flow of the medium in both directions. This enables the operator to conduct observations regarding the process and the flow of the medium without interfering with the flow process.
Overview
Double Window Sight Glass can be fitted to the process lines for viewing the liquid flow from both sides of the glass.
The design of the glass is based on the use of borosilicate double window sight glass, which gives the ability to watch the process flow while ensuring safe operation at the same time.
The glass is used as a visual flow indicator and can be used for monitoring of liquid circulation in systems like cooling water pipeline.
A flanged double window sight flow indicator can be used for chemical process lines.
Features
- Provides clear two-way visual inspection of process flow.
- Toughened borosilicate glass offers excellent thermal and mechanical strength.
- Leak-proof construction tested for high-pressure applications.
- Easy glass cleaning and maintenance.
- Available in a wide range of materials of construction.
- PTFE (Teflon) lined version available for corrosive media.
- Custom face-to-face dimensions available on request.
- Available with flapper, rotary wheel, drip tube, and steam jacket configurations.
- Durable construction manufactured to industrial standards.
Specifications
| Line Size | 15 NB to 300 NB |
| Wetted Parts | MS, CS, SS304, SS304L, SS316, SS316L, PP, PTFE Lined |
| Glass Material | Toughened Borosilicate Glass |
| Connection | Flanged (ASA, ABS, DIN, JIS), Screwed BSP / NPT, Butt Weld |
| Construction | Double Window Type Sight Glass |
Process Parameters
- Application: Liquids & Gases
- Line Size: 15 NB to 300 NB
- Design Temperature: Up to 200°C (Depending on Type)
- Design Pressure: Up to 40 Kg/cm² (Depending on Type)
- Installation: Horizontal or Vertical Pipeline
Working Principle
Direct Inline Flow Entry
The Double Window Sight Glass is positioned directly onto the pipeline so that the process fluid flows through the middle of the viewing chamber. This makes it possible for the operators to monitor the flowing fluid without disturbing the regular process flow.
Dual Window Viewing
The fluid is visible by means of two oppositely located viewing windows that consist of borosilicate glass to make it possible to observe both liquids and gases from two positions.
Flow Movement Indicator
In case the application requires confirming the flow, there is an optional flow indicator that can be placed inside the instrument. The flow will cause the rotation of the indicator.
Process Flow Monitoring
By means of a transparent viewing chamber the operators have the possibility to monitor the fluid flow, air bubbles presence, liquid color change, as well as flow disruptions in the pipeline.
Secured by Flanges Construction
The construction based on flanges with sealing elements secures the viewing chamber to the pipeline while functioning at industrial conditions.
Available Options
Size Configurations
- Line Size Parameters: Range spanning from 15 NB up to 300 NB depending upon the type.
Material Options
- Process Flange Body Metallurgy: Mild Steel (MS), Carbon Steel (CS), Stainless Steel 304, Stainless Steel 304L, Stainless Steel 316, Stainless Steel 316L.
- Corrosive Protection Barriers: Polypropylene (PP) and PTFE Lined construction variations.
- Sensing Transparency Element: Toughened borosilicate glass sandwiched design.
End Connections
- Flanged Variations: Built to match standard ASA, ABS, DIN, or JIS ratings.
- Screwed Variations: Standard male or female BSP or NPT threaded configurations.
- Welded Variations: Built for structural integration via Butt Weld ends.
Operating Parameters & Limits
- Maximum Design Temperature: Up to 200°C depending upon the type.
- Maximum Design Pressure: Up to 40 Kg/cm² depending upon the type.
Mechanical & Accessory Variations
- Flanged Process Design: Integrated style establishing a double window sight glass with flange connection.
- Screwed Process Design: Compact style layout establishing a double window sight glass with screwed connection.
- Visual Flow Indicator Flapper: Internal indicator feature built as a double window sight glass with flapper mechanism.
- Visual Flow Indicator Wheel: Rotational internal mechanism supplying a double window sight glass with rotary wheel configuration.
- Drip Tube Integration: Internal configuration variant delivering a double window sight glass with drip tube assembly.
- Thermal Conditioning Enclosure: High-temperature structure provided as a double window sight glass with steam jacket setup.
Why Double window Sight Glass
Flow Visible Inspection: The double window sight glass ensures visual monitoring of process fluids to observe flow status without interfering with the pipeline.
Chemical Process Reliable Monitoring: Double window sight glass with PTFE lining has better protection against corrosive fluids and can be used reliably for chemical processes.
High Temperature Suitable Sight Glass: Tempered borosilicate double window sight glass is used in our sight glasses to withstand tough industrial conditions.
Flow Confirmation: With a flapper indicator, double window sight glass helps operators identify low-speed flow conditions of fluid.
Frequently Asked Questions
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