Series DW

Added protection for pipeline systems in high traffic or confined areas

Dual-window sight flow indicators provide two glass discs on each side, so that if either glass should fail for any reason, the other window can withstand pressures temporarily until the unit can be repaired or replaced. Dual-window sight flow indicators and Factory Mutual System approved dual-window sight flow indicators are available in 150 pressure class NPT models and 150 and 300 pressure class flanged models.

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 – 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.

Penberthy Dual Window Sight Flow Indicators

Added protection for pipeline systems in high traffic or confined areas

Models

150 pressure class NPT dual-window

150 pressure class flanged dual-window

300 pressure class flanged dual-window

The double, tempered glass window design provides added protection in applications where there is:

Materials of construction for body

Standard

Optional

Gaskets

Resources