Non-Pressurised Sight Glass

The Non-Pressurised Sight Glass is a cost-efficient, hygienic viewing solution designed for welding into or onto vessel walls. This low-profile assembly provides clear internal visibility for tanks, silos, stirred vessels, separators, and pipelines where no internal pressure is present, making it a practical alternative for ambient-pressure applications.

The sight glass consists of a precision-machined glass disc, fully gasketed on both sides, and clamped securely between two circular flanges using clean, countersunk screws—an arrangement that supports easy wash-down and eliminates unnecessary crevices.

Key Features

• Weld-on or weld-in installation: Ideal for fixed vessel integration.
• Hygienic, low-profile design: Countersunk screws for easier cleaning and reduced contamination risk.
• Viewing diameters: 80–225 mm to suit a wide range of vessel sizes.
• Operating temperature: Up to 280 °C.
• Operating pressure: None (ambient applications only).
• Materials available: Stainless steel, carbon steel, and high-performance alloys including Hastelloy.
• Custom configurations: Tailor-made designs available to meet specific process or dimensional needs.

Typical Applications

• Ambient-pressure storage tanks
• Silos and material holding vessels
• Stirred vessels and mixers
• Separators and handling systems
• Gravity-fed or unpressurised pipelines

Built for simplicity, serviceability, and clarity, the Non-Pressurised Sight Glass delivers dependable visual monitoring where full pressure compliance isn’t required.

Technical Specifications: