Low Pressure Sight Glass

Low-Pressure Circular Sight Glass Fittings

These low-pressure sight glasses are designed for welding either into or onto vessel walls, offering a compact and cost-efficient alternative to the DIN 28120 series. Their reduced dimensions make them ideal for applications where full DIN compliance is not required, without compromising durability or visibility.

Engineered for process observation, they are suitable for monitoring the internals of tanks, pressure vessels, silos, gear trains, separators, and pipelines. Each unit is supplied as a complete assembly, ensuring straightforward installation and dependable performance.

Key Features:

• Circular pad flange design for welding into or onto vessel walls

• Cost-effective solution for lower pressure applications

• Supplied complete with gaskets, sight glass disc, and hexagon head screws

• Viewing diameters available from 50 mm to 600 mm

• Operating temperature: up to 280 °C (up to 900 °C with special materials)

• Operating pressure: up to 5 bar

• Materials: stainless steel, carbon steel, and specialty alloys such as Hastelloy

• Custom-built versions available

• Optional wiper mechanisms for improved visibility