Double Window Sight Glass

Double Window Sight Glass is a precision-engineered viewing device designed to provide continuous and reliable visual monitoring of process media in industrial pipeline systems. The unit consists of two thick borosilicate glass panes mounted on opposite sides of a rugged body, ensuring enhanced visibility and operational safety.

Built using high-grade materials such as Cast Carbon Steel and Duplex Stainless Steel, it is suitable for corrosive and demanding environments. PTFE-sealed gaskets and optional PTFE-lined designs make it ideal for chemical, pharmaceutical, steam, and process industries where safety and contamination resistance are essential.

Specifications

• Valve Type: Double-window Sight Glass
• Size Range: DN 25 – DN 200 (1″ – 10″)
• Pressure Rating: ANSI 150#, ANSI 300#, ANSI 600# (on request)
• Temperature Range: –20°C to +200°C
• Glass Type: Borosilicate (DIN 7080), Quartz Optional
• Connection: Flanged
• Service Media: Water, Steam, Chemicals, Oils

Material of Construction

• Body & Flanges: Carbon Steel (WCB), SS304 / SS316
• Optional Body Materials: CF8M, Duplex SS, Hastelloy, PTFE-lined
• Glass Pane: Borosilicate DIN 7080
• Gaskets: PTFE, NBR, EPDM
• Tie Rods / Nuts: SS304 / SS316, optional 316L

Applications

• Flow monitoring in industrial pipelines
• Steam trap inspection
• Chemical and pharmaceutical processing lines
• Oil, water, and process fluid observation