Dual windows are comprised of two glass discs held in position by a metallic housing, internal shims and gaskets (pictured above).
The double, tempered glass window design provides added protection in applications where there is:
External mechanical impact - if the outer glass is cracked or shattered, the inner glass can temporarily continue in service until the unit can be repaired or replaced.
Abnormal compressive forces - in maintenance or replacement situations, the housing assists in alignment of the glass and can absorb uneven or excessive compression.
Thermal shock - in high temperature applications the inner and outer glass protect one another from an extreme thermal gradient. The air pocket between the glass provides an insulative effect.
Corrosion/erosion - if the inner glass is weakened and it breaks, the outer glass can temporarily contain the fluid, withstand the pressure, and continue in service until the unit can be repaired or replaced.
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