METAGLAS® Type 11.B3 — Sight Glass Flange to DIN 2501
The METAGLAS® Type 11.B3 sight glass flange is engineered for
direct connection to DIN 2501 flanges.
This version features a concave glass surface on both faces, providing uniform
stress distribution and optical clarity under load.
Designed for a flat-face mating flange, it delivers reliable sealing and easy integration
into pressure vessels and pipeline systems.
Design & Construction
Standard Interface: DIN 2501 flat-face flange connection
Glass Form: Concave both faces for enhanced mechanical strength and optical performance
Mounting: Mates to flat-faced flanges without a sealing ledge
Bonding Method: Metal-fused construction creates permanent compression pre-stress in the glass
Sealing: Use with appropriate flat gasket materials per DIN standards for leak-tight performance
Pressure / Temperature Range: Dependent on nominal size and material selection (details available on request)
Applications
Process vessels and reactors with DIN 2501 flange interfaces
Chemical and pharmaceutical systems requiring direct visual observation
Food and beverage processing lines and utility systems
Retrofit solutions where flat-face mounting is standard
Key Advantages:
DIN 2501 compliant mounting interface
Concave dual-face glass for enhanced strength and optical clarity
Metal-fused bond — no gasket creep or leak paths at the glass/metal interface
Maintenance-free operation and easy installation on flat-face flanges
Available in various sizes and materials to match application requirements
John Moncrieff Ltd supplies the METAGLAS® Type 11.B3 as part of its range of high-integrity sight glass flanges,
delivering safe, reliable, and long-life process visibility solutions to DIN and PED standards.
