Rectangular Sight Glass Fitting

The Rectangular Sight Glass Fitting provides a robust, extended-view inspection window engineered for welding into or onto vessel walls. With a slim, elongated viewing profile, this design is ideal for process vessels, silos, mixers, reactors, and pipelines where operators need a clear longitudinal view of internal conditions.

Each unit is supplied as a complete assembly, including the precision glass plate, gaskets, and bolting. Available in both reflex and transparent configurations, the fitting achieves high thermal performance up to 243°C when manufactured with borosilicate glass to DIN 7081.

Key Features

• Weld-in or weld-on installation for tanks, vessels, and pipelines
• Supplied complete with fully gasketed glass plate and bolting
• Available in transparent or reflex glass styles
• Optional closed base frame for specialised builds
• Extended viewing geometry for enhanced process visibility

Specifications

• Sizes: 250 mm to 1000 mm long, 70 mm wide
• Viewing Slot: 18 mm
• Operating Temperature:
  • Up to 243°C with borosilicate glass (DIN 7081)
  • Up to 150°C with soda-lime glass (DIN 8903)
• Materials: Stainless steel, carbon steel, or Hastelloy

Designed for demanding industrial environments, the Rectangular Sight Glass Fitting offers reliable performance, extended visibility, and long-term durability across a wide range of process applications.

Technical Specifications: