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Unishield Glass Protection |
| Our full line of sight flow indicators and sight windows are now available with Unishield, a fused PFA Teflon® glass shield. This latest innovation in glass protection from Jacoby Tarbox is available for window discs and cylinders for both positive pressure and VACUUM service. This technology incorporates PFA Teflon® Fluoropolymer powder coating over a clear catalytic primer resulting in the fused PFA Teflon® shield. This technology is the latest addition to the standard loose PFA, KEL-F, and MICA shields currently employed by process engineers for hazardous service and glass protection. |
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| Borosilicate glass, the standard in all Jacoby Tarbox process equipment, is corrosion resistant to most chemical processes. However, glass should be protected or enhanced under known corrosive and difficult applications. |
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| Chemical Attack |
| All hydroxides |
| Hydrofluoric acid |
| Steam |
| pH over 7.5(caustics) |
| Phosphoric acid |
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| Corrosive Vacuum Services |
| Vessels/lines to full vacuum |
| NPSH on lines induced by pumps |
| Vacuum process tanks |
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| Sticky Services |
| High viscosity fluids |
| Fatty processes |
| Petrochemical/Refining |
| Bulk resin production |
| Polymers |
| Concentrates |
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| Why UniShield ? |
| Four Reasons Why Loose Shields Eventually Fail: |
| LOOSE SHIELDING |
UNISHIELD |
| Tearing: Thermal cycling causes stress in shield, even in the most precise assembly, at the edge of the unsupported area by the gasket. |
Unshield does not fail because fused construction results in no unsupported areas on entire surface. |
| Stress Concentrations in Vacuum Service: Vacuum service induces a stress on the shield, "pulling" at supported area of the loose shields, resulting in tearing |
Unishield, having superior adhesion, results in uniform loading and no concentration of force to "pull" shield to failure. |
| Turbulent Flow (Time, Temp. & Pressure) Turbulent and high vacuum flow after time at varying temperatures or at varying pressures causes fatigue and eventually failure. |
Unishield is not moved by varying pressures of eddy currents, stressed by changes in temperature, or fatigued by these events over time. |
| Full Surface Exposed To Permeation: Permeation occurs through all plastic lining and shielding over time. Field studies have shown that permeation occurs more quickly in loose, unsupported liners and shields. |
Unishield's fused construction slows permeation and limits exposure to only permeated area and not entire face upon permeation. |
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| Example of Unishield: |
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