GlassCatalogue_LowRes

Double Glazing Components / Pressure Control
Two-Way Valve
The two-way valve is a pressure regulation device
that allows an adjustment between the inner and
outer pressure of an insulated glass unit. The
valve is developed for IG units that are exposed to
continuous pressure changes as a result of variations
in barometric pressure, altitude, or temperature.
Usage
The two-way valve has been developed to improve the reliability of insulated glass
units by solving the common problem of excessive pressure differences putting an
insulated glass unit under stress and causing damage such as cracks in the glass or
loosening of the sealant.
The valve is inserted through a 6mm hole in the spacer frame. Once the insulating
glass unit is sealed, the valve is usually cut at the secondary seal and closed with the
supplied plug. The valve is equipped with a silicone tube compatible with JS562.
How It Works
Under normal conditions the valve remains closed without letting air in or out of the
unit. When the difference between inner and outer pressure exceeds a range of ±
80 millibar the valve opens, allowing an adjustment in pressure. When the variation
reaches a range of ± 25 millibar, the valve shuts and the unit is completely sealed
again. The “two-way” valve does not perfectly balance the I.G. unit pressure, it only
allows an adjustment between inner and outer pressure.
Features
• Opens automatically when pressure differential exceeds range of ± 80 millibar
• Can be installed in all kinds of spacer bars with a minimum width of 9.5mm
• Most effective in gas-filled units but cannot be used as a gas-filling hole
• Reduces the risk of visual distortion, seal stress and glass fracture
Size: Available with 6.5mm or 8mm collared bush depending on spacer size.
Colour: Available in both clear and black.
Email: info@fgtrading.co.za | Web: www.fgtrading.co.za
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