Fused Sight Glass Series
Fused sight glasses are manufactured using advanced metal-to-glass sealing technology, providing excellent pressure resistance and sealing performance.This series is suitable for high-temperature, high-pressure, and vacuum applications.Commonly used in reactors, pressure vessels, and critical process equipment.
BL-NAFL-XX NA Flange for Fused Sight Glass
The Borlan Fluid BL-NAFL-XX NA flange is a bolted companion flange for matching fused sight glass installations. Six catalog sizes from 1.5 to 4 inches are available, with defined L1-L5 and H1-H3 reference dimensions. Confirm the mating window, material, soft seal, fasteners and operating conditions for each project.
BL-SJFL-XX Fused Flat Flange Sight Glass
The Borlan Fluid BL-SJFL-XX fused flat flange sight glass provides a compact bolted observation window for tanks and process vessels. Catalog sizes cover DN50-DN200 with PN16 flange dimensions. The fused glass-to-stainless-steel construction supports a flatter contact surface, while the final pressure, temperature, material, seal and documentation are confirmed for each project.
BL401-3 Fused Tank-Top Sight Light
BL401-3 fused tank-top sight light with an integrated illumination unit and sintered glass-to-metal process-facing window. Borlan’s 2025 catalog lists 1.5-inch and 2-inch connection sizes. Specify the electrical configuration, mating port, seal, process conditions and documentation for an exact quotation.
BL901-1 Sintered Clamp Tank Top Sight Light
BL901-1 battery-powered clamp-mount tank-top sight light for a compatible vessel inspection point. The 2025 catalog lists 1.5-inch and 2-inch lamp dimensions and conventional or sintered wetted-face options; the conventional face is listed only for 1.5 inch. Confirm the mating sight glass, supply scope and approved battery configuration.