METAGLAS® Type 11 — Metal-Fused Sight Glass Flange to DIN 2501
The METAGLAS® Type 11 sight glass flange provides exceptional reliability and visibility in demanding process applications.
Designed for flat-faced mating flanges, it combines robust construction with a low-profile design to maximize
viewing area while minimizing build height. Its metal-fused construction ensures long service life and eliminates the risk
of sudden failure — setting a benchmark for safety and performance.
Design & Construction
Flange Interface: DIN 2501 connection for flat-faced flanges
Sealing: Requires a complete sealing gasket — not suitable for flanges with sealing ledge
Design Philosophy: Total failure prevention through mechanical pre-stressing of the glass
Glass Surface: Smooth, easy-clean surface for hygienic and optical applications
Profile: Minimal build height for compact installation
Construction: Metal-fused bond between glass and steel ring for superior strength and longevity
Performance Benefits
Reliability against rupture or catastrophic failure
Long operational life under thermal and pressure stress
Clear, distortion-free viewing across the full aperture
Resilient to chemical, thermal, and mechanical loads
Maintenance-free performance once installed
Applications
Process vessels and reactor sight ports
Chemical, pharmaceutical, and food industries
Pressure equipment with DIN 2501 flange interfaces
Utility and service pipelines requiring visual monitoring
Key Advantages:
DIN 2501 flange compatibility — universal fit for flat-face designs
Mechanically prestressed METAGLAS® construction eliminates rupture risk
Compact, low-profile form factor for maximum visibility
Smooth, easy-clean glass surface for sanitary environments
Long-term reliability under extreme operating conditions
John Moncrieff Ltd supplies METAGLAS® Type 11 sight glasses for use across critical process applications —
delivering proven reliability, optical precision, and safety compliance to DIN and PED standards.
