What Is a Sanitary Sight Glass
A sanitary sight glass lets operators inspect product flow, color, and cleaning effectiveness without opening the line. Used in dairy, food processing, brewery, pharma, and biotech.
We make them in Wenzhou, China in sizes 1/2″ to 6″, tri-clamp, weld, or threaded. Body: SS304/SS316L. Glass: tempered borosilicate. Finish: Ra ≤ 0.8 μm.
Types We Manufacture
Tri-clamp sight glass — clamp connection, quick install. Most common. Sizes 1/2″ to 6″.
Inline sight glass — welded directly into pipeline. For high-pressure and high-purity.
Tube sight glass — for tube OD systems. Common in brewery and pharma skids.
Threaded sight glass — NPT/BSPT threads. For small lines and instrumentation.
Full view sight glass — 360-degree visibility for critical observation.
Glass and Seal Options
Standard: tempered borosilicate, thermal shock to 200°C. Optional: toughened glass, double-layer for vacuum, LED-illuminated for dark products.
Seals: EPDM (standard), Silicone (SIP), FPM (chemical), PTFE (high purity).
FAQ
Q: What size do I need? Match pipe diameter. Tri-clamp follows standard tube OD.
Q: CIP compatible? Yes. Borosilicate + EPDM handles 80°C CIP. For SIP above 120°C, use Silicone.
Q: Pressure rating? Standard up to 10 bar. High-pressure available on request.
Technical Review
Zhang Wei, Senior Engineer. onemo@onemoss.com
