Low-Reflection Tempered Transparent Observation Sight Glass for Flange Gauges

1. Material & Construction

• Core Material: Borosilicate glass (Schott Borofloat®/equivalent) or soda-lime glass

• Surface Treatment:

  • Anti-reflective (AR) coating (V-coating or broadband)

  • Chemical tempering (ion-exchange process)

• Sealing: Integrated EPDM/graphite gaskets for pressure containment

2. Key Properties

• Optical Clarity:

  • 99% visible light transmission (uncoated: >92%)

  • Reflectivity <0.5% per surface (550nm)

• Mechanical Strength:

  • IK08 impact resistance (5J impact tolerance)

  • 4x stronger than annealed glass

• Pressure/Thermal Ratings:

  • Withstands 25+ bar pressure (ASME B16.5 compliant)

  • Thermal shock resistance: ΔT >150°C

• Chemical Resistance:

  • pH 1-14 compatibility

  • Resists oils, solvents, and process chemicals

3. Core Functions

• Visual Monitoring: Unobstructed view of fluid flow/level without glare

• Pressure Containment: Maintains seal integrity at rated PSI

• Safety Assurance: Shatterproof design contains fragments upon failure

• Process Verification: Enables visual inspection of media color/contaminants

4. Applications

• • Industrial Process Vessels:

    • Reactor sight glasses (chemical/pharma)

    • Pipeline inspection ports (oil/gas)

  • Fluid Control Systems:

    • Pump gauge glasses

    • Boiler level indicators (ASME Section VIII)

  • Utility Infrastructure:

    • Water treatment plant gauges

    • Steam line observation windows