Sight Glasses

Sight glasses allow quick & easy visual inspection throughout your system;

  • Assess correct flow indication
  • Detect blocked flow
  • Identify any live steam or vapour leakage
  • Inspect colour of product throughout process
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Not all products are available in all markets.  Please choose your National Spirax Sarco Website or Contact Us for further information.

What do I do now?

Find further information on Sight Glasses in the sections below, or get in touch for further assistance.

Contact us for advice from our engineers

  • Help on sizing and selection
  • Arrange a visit
  • Answers & advice on products/applications
  • Obtaining quotes & placing orders
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Technical Information

Use our technical information sheets for a full technical specification of the product. They typically include:

  • Pressure/temperature limits
  • Materials
  • Sizes & connections
  • Dimensions & weights
  • Capacity charts
  • Ordering information
Title Reference Number Issue File Size
PDF SG13 Brass Sight Glass TI-P130-11 5 74 KB
PDF SG253 Sight Glass TI-P130-01 9 549 KB
PDF SGC40 and SGS40 Sight Glasses TI-P130-28 8 269 KB
PDF Sight Check (combined sight glass and check valve) TI-P022-01 8 135 KB
PDF Single Window and Double Window Sight Glasses TI-P022-05 4 140 KB
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Installation & Maintenance Instructions

Clear & accurate guidelines on installation & maintenance. They typically include:

  • General safety information
  • General product information
  • Installation
  • Commissioning
  • Operation
  • Maintenance
  • Spare parts
Title Reference Number Issue File Size
PDF SGC40 and SGS40 Sight Glasses IM-P130-29 6 404 KB
PDF Sight Check (combined sight glass and check valve) IM-P022-02 4 54 KB
PDF Single and Double Window Sight Glasses and Sight Check IM-S32-04 8 299 KB
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Steam Engineering Tutorials

Tutorials explaining the principles of steam and heat transfer, specific to this product section.

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CAD Drawings

CAD drawings enabling you to see exactly how the product is constructed. You can also drop these into your own schematics.

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Contact us for advice from our engineers

  • Help on sizing and selection
  • Arrange a visit
  • Answers & advice on products/applications
  • Obtaining quotes & placing orders