The METAGLAS® Type 99.LSG is engineered as a direct, high-integrity replacement for
rectangular and D-ended sight glass assemblies. Built on the proven METAGLAS®
metal-fused technology, Type 99.LSG delivers unmatched mechanical strength, impact resistance, and
thermal stability — far exceeding the performance envelope of traditional rectangular glass plates.
Why Upgrade to METAGLAS® Type 99.LSG?
Direct Replacement: Designed to replace standard rectangular or D-ended sight glass formats without redesigning your equipment.
Fail-Safe Strength: Fused borosilicate glass held in permanent compressive stress inside a stainless-steel frame.
Superior Safety: Eliminates the risk of catastrophic glass failure seen in conventional panels.
Extended Service Life: High durability under thermal cycling, vibration, and chemical exposure.
Hygienic & Easy to Clean: Smooth, low-profile surface with no internal stress points.
High Clarity: Optically superior fused glass with excellent light transmission.
Applications
Rectangular process sight ports
D-ended vessel or tank inspection windows
Mixers, reactors, and process vessels
Pharmaceutical and biotech production equipment
Chemical and petrochemical process systems
Food & beverage process visibility panels
Key Advantages:
Direct drop-in replacement for existing rectangular/D-ended glass
Mechanically prestressed METAGLAS® structure for ultimate safety
Shockproof, vibration-resistant, and thermally stable
Suitable for CIP/SIP and high-purity environments
Custom sizes available for legacy and OEM assemblies
Specify dimensions, pressure rating, operating temperature, frame material, and sealing arrangement when ordering.
John Moncrieff Ltd provides custom-engineered Type 99.LSG units to match your existing equipment footprint with full QA documentation.
