Jacoby Tarbox — Sight Windows
UniGlas® Safety Windows
Glass Fused to Metal · No Bonding Agents · 530°F · Fail-Safe · 3-A Sanitary Compliant
UniGlas® Safety Sight Windows — Exclusive to Jacoby Tarbox
Borosilicate glass fused directly to metal — a single unit with exceptional resistance to impact, pressure, scratching, and pitting. No separate gaskets or seals to fail. Available in dual and single-window styles for pressures to 530°F. Patented design.
Exclusive to Jacoby Tarbox
UniGlas is a proprietary Jacoby Tarbox technology. The fused glass-to-metal construction is not available from other sight window manufacturers. UniGlas is standard on all Jacoby Tarbox TruSan 6000 Sight Flow Indicators and is available as an upgrade on other models.
UniGlas Features & Technology
Fused Glass-to-Metal Construction
UniGlas windows are single units of borosilicate glass fused directly to metal — no bonding agents, adhesives, or cements. The glass and metal become one integral unit, eliminating the failure modes associated with bonded assemblies.
No Shims, Packings, or Adjusting Screws
The fused construction eliminates the need for shims, packings, or adjusting screws during installation. This simplifies installation and removes potential leak paths.
Exceptional Impact & Pressure Resistance
UniGlas windows are specifically designed for rugged conditions. The fused metal ring reinforces the glass against impact and pressure, providing exceptional resistance to mechanical abuse.
Scratch & Pitting Resistance
The borosilicate glass surface resists scratching and pitting from abrasive process fluids, maintaining visibility over the service life of the window.
Fail-Safe Performance
Even when intentionally cracked in performance testing, UniGlas showed only slight weepage with no window blowout or failure. The metal ring retains the glass even if cracked, providing the safest possible performance.
High-Temperature Capability
UniGlas handles most high-pressure system temperatures to 530°F — higher than standard borosilicate glass windows (450°F). Suitable for steam and high-temperature process service.
3-A Sanitary Compliance
UniGlas sealing surfaces comply with 3-A Fittings Standards, making them suitable for food, beverage, dairy, and pharmaceutical applications requiring sanitary construction.
Single and Dual Window Styles
Available in both single-window and dual-window configurations. The dual-window style allows through-lighting for improved visibility in dark or opaque process fluids.
Specifications
| Parameter | Value |
|---|---|
| Construction | Borosilicate glass fused to metal ring — no bonding agents |
| Temperature | Up to 530°F |
| Pressure | Per model and size (contact for specific ratings) |
| Glass Type | Borosilicate (fused to metal) |
| Metal Ring | Carbon Steel standard; 316 SS available |
| Window Styles | Single window; dual window (for through-lighting) |
| Sanitary Compliance | 3-A Fittings Standards compliant sealing surfaces |
| Standard Use | Standard on all Jacoby Tarbox TruSan 6000 Sight Flow Indicators |
| Replacement | UniGlas units are field-replaceable as complete assemblies |
UniGlas vs. Standard Glass Windows
| Aspect | Standard Glass | UniGlas |
|---|---|---|
| Construction | Glass disc with separate gaskets | Glass fused to metal ring — single unit |
| Bonding Agents | May use adhesives or cements | None — glass and metal are fused |
| Max Temperature | 450°F (borosilicate) | 530°F |
| Impact Resistance | Glass disc can shatter | Metal ring retains glass even if cracked |
| Failure Mode | Potential blowout if glass fails | Only slight weepage — no blowout |
| Installation | Requires shims, packings, adjusting screws | No shims, packings, or adjusting screws |
| 3-A Compliance | Depends on model | Yes — sealing surfaces comply with 3-A |
UniGlas safety window sales & specifications
Contact us for model selection, sizing, and UniGlas upgrade options for existing installations.
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