ISO certified unit in India that manufactures of Strainer

Sight Glass

Tubular Sight Flow Indicators Tubular Sight Flow Indicators

Tubular Sight Glasses are widely used in industrial pipelines and process equipment to visually monitor the flow, level, clarity, and color of liquids. These units consist of a transparent glass tube—typically made from high-quality borosilicate glass—secured between metal end fittings and protected by a sturdy frame or guard rods. Tubular sight glasses provide continuous visual inspection of fluids without interrupting the process, making them ideal for applications where real-time monitoring is essential. Designed for durability and safety, tubular sight glasses are suitable for a wide range of industrial environments including chemical processing, oil & gas, pharmaceuticals, food processing, power plants, and water treatment systems.

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Tubular Sight Glass assemblies typically include a clear borosilicate glass tube mounted between two metal end connections with sealing gaskets and protective guards. The transparent tube allows operators to directly observe liquid movement, flow condition, or fluid level inside pipelines or tanks.

The design enables easy installation, maintenance, and replacement of glass tubes when required. Optional protection shields and illumination arrangements can also be incorporated for enhanced visibility and safety.

  • Clear Visual Monitoring
    Provides direct visual observation of liquid flow, clarity, and color.

  • High Strength Borosilicate Glass Tube
    Resistant to thermal shock, chemical corrosion, and high temperatures.

  • Robust Construction
    Heavy-duty metallic body ensures long operational life in harsh industrial environments.

  • Easy Maintenance
    Glass tubes can be replaced easily without replacing the entire assembly.

  • Leak-Proof Sealing
    High-quality gasket materials ensure reliable sealing under pressure.

  • Protective Guard Rods
    Stainless steel rods protect the glass tube from accidental damage.

  • Wide Industrial Compatibility
    Suitable for multiple fluids including water, chemicals, oils, solvents, and gases.

Glass Material Options

 

  • Borosilicate Glass
  • Quartz Glass (for higher temperature applications)

 

End Connection Types

 

  • Flanged Ends
  • Threaded Ends
  • Socket Weld Ends
  • Tri-Clamp Ends (for hygienic applications)

 

Body Material Options

 

  • Stainless Steel (SS304 / SS316 / SS316L)
  • Carbon Steel
  • Alloy Steel
  • PVC / PP / PTFE lined body (for corrosive chemicals)

 

Protection Options

 

  • Stainless Steel Guard Rods
  • Polycarbonate Safety Shield
  • Wire Mesh Guard

 

Additional Options

 

  • LED Illuminator
  • Wiper Mechanism
  • Drain Valve
  • Heating Jacket
  • Anti-Frost Shield
Parameter Specification
Nominal Size 1" to 6" 
Glass Tube Material Borosilicate Glass / Quartz Glass
Maximum Pressure Up to 10 kg/cm² (depending on size & design)
Maximum Temperature Up to 200°C (Borosilicate) / 500°C (Quartz)
Body Material SS304 / SS316 / SS316L / Carbon Steel
Sealing Material PTFE / EPDM / Viton / Graphite
End Connections Flanged / Threaded / Socket Weld
Flange Standard ANSI / DIN / BS / JIS
Tube Length 100 mm to 300 mm (custom lengths available)
Mounting Horizontal or Vertical

Industrial Applications

 

  • Chemical Processing Plants
  • Petrochemical & Oil Refineries
  • Pharmaceutical Manufacturing
  • Food & Beverage Processing
  • Water & Wastewater Treatment Plants
  • Power Generation Plants
  • Fertilizer Industries
  • Pulp & Paper Mills
  • Sugar & Distillery Plants
  • Boiler Systems

 

Typical Uses

 

  • Monitoring liquid flow in pipelines
  • Observing fluid color or clarity
  • Checking contamination in process fluids
  • Verifying flow conditions during operations
  • Visual inspection in tanks and vessels
  • Level indication in low-pressure systems
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