Jacoby Tarbox — Sight Windows
Sight Windows & Vessel Inspection Windows
ASME Code · UniGlas Safety · FM Dual Window · Weld-Pad Mounting
Jacoby Tarbox® Sight Windows
Jacoby Tarbox manufactures sight windows for nearly all connections — male and female threaded, flanged, and welded. Circular and obround windows are available manufactured in accordance with Section VIII of the ASME Boiler and Pressure Vessel Code. Most sight windows are available with UniGlas® and/or Dual Window assemblies.
The maximum pressure at which a sight flow indicator safely operates is determined by the characteristics of the glass window. Jacoby Tarbox offers a complete range of sight windows for vessels, autoclaves, pipelines, vacuum components, compressors, pumps, filters, and other related equipment — for both new and retrofit installations.
Window Models
Model 5005DW
Standard weld-pad sight window for vessels and pipelines. Economical design for general service applications.
Weld-pad mounting
Model W5000
Weld-pad sight window with enhanced design for demanding process conditions. Available in multiple materials.
Weld-pad mounting
Model 5200
Standard weld-pad sight window for pressure vessels and pipelines. Borosilicate glass standard.
Weld-pad mounting
Model 5200PVQ
ASME Code sight window for pressure vessels. Designed and fabricated to ASME Code requirements for pressure vessel applications.
ASME Code · Pressure vessel service
Model 5300PVQ
Oblong ASME Code sight window for pressure vessels. Provides wider viewing area than round windows. Designed and fabricated to ASME Code.
ASME Code · Oblong design · Wider viewing area
Model S5400
Specialty sight window for demanding process applications. Contact us for specifications and materials.
Specialty applications
FM Dual Windows
FM-approved dual window design for hazardous area installations. Extra precaution for systems carrying hazardous materials or those in heavy traffic areas.
FM Approved · Hazardous area rated
Uniglas Safety Windows
UniGlas windows specifically designed for rugged conditions. Exceptional resistance to impact, pressure, scratching, and pitting. Even when intentionally cracked in performance testing, UniGlas showed only slight weepage with no window blowout or failure.
Single-unit borosilicate glass fused to metal · No bonding agents · To 530°F
Glass & Window Materials
| Material | Max Temperature | Notes |
|---|---|---|
| Borosilicate Glass | 450°F max | Standard for most applications |
| Acrylic | 185°F intermittent / 145°F continuous | Plastic option for lower temperatures |
| Polycarbonate | Varies | Impact-resistant plastic option |
| Quartz | Above 500°F | High-temperature applications |
| UniGlas (Borosilicate fused to metal) | To 530°F | Maximum safety, no bonding agents |
Glass Shields (for corrosive media)
Kel-F
Materials that erode or etch glass
PFA
Aggressive chemical service
Mica
High-temperature steam service
UniGlas® — Exclusive to Jacoby Tarbox
UniGlas windows are specifically designed for rugged conditions, featuring exceptional resistance to impact, pressure, scratching, and pitting. Even when intentionally cracked in performance testing, UniGlas showed only slight weepage with no window blowout or failure — providing the safest possible performance even in conditions not normally encountered in process lines.
- →Single units of borosilicate glass fused to metal — no bonding agents
- →No shims, packings, or adjusting screws for installation
- →Handles most high-pressure system temperatures to 530°F
- →Sealing surfaces comply with 3-A Fittings Standards
- →Available in dual and single-window styles
- →Standard on all Jacoby Tarbox TruSan 6000 Sight Flow Indicators
Sight window sales & ASME Code fabrication
Contact us for model selection, ASME Code requirements, and special application needs.
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