METAGLAS® Type 73.SW — Circular Metal-Fused Sight Glass with Wiper
The METAGLAS® Type 73.SW is a metal-fused circular sight glass assembly equipped with an integrated
wiper system, providing clear visibility in demanding process environments where condensation, deposits, or fouling can occur.
Manufactured to dimensions referring to DIN 7079 / DIN 7080, this unit delivers long-term optical performance under pressure and temperature stress.
Design & Construction
Type: Metal-fused circular sight glass with manual wiper
Dimensional Reference: DIN 7079 / DIN 7080
Compatible Fittings: Sight glass fittings DIN 28120, DIN 28121; flow indicator sight glasses DIN 3236, DIN 3237
Glass-to-Metal Bond: Permanently fused joint delivering high mechanical pre-stress and leak-tight integrity
Temperature Range: Up to +150 °C
Other Dimensions: Available upon request to suit custom installations
Applications
Process vessels and reactors requiring visual inspection under load
Chemical, pharmaceutical, and food-processing systems
Flow indicators in liquid or steam service
Installations prone to vapour or product build-up where manual cleaning is required
Key Advantages:
Fully compatible with standard DIN-pattern sight glass fittings
Wiper maintains clear vision during operation
Metal-fused construction ensures pressure and temperature resilience
Maintenance-free optical seal with no gasket creep or leakage
Custom diameters and materials available on request
John Moncrieff Ltd supplies METAGLAS® Type 73.SW sight glass assemblies
for use across critical process industries — engineered for visibility, reliability, and compliance
with DIN and PED standards.
