The Importance of Capillary Tubes in High-Altitude Window Shipping

The Role of Capillary Tubes in Pressure Equalization

When shipping windows from low-elevation areas such as the Chicago land region to high-altitude locations like Salt Lake City, Utah, Boulder, Colorado, Quito, Ecuador, or Potosí, Bolivia, it is crucial to account for the significant pressure differentials that occur due to elevation changes. To manage these pressure differences effectively, capillary tubes are inserted into the spacer frame of insulated glass units (IGUs).

Preventing Pressure Imbalances in Insulated Glass Units

The function of these capillary tubes goes beyond mere structural integrity; they actively work to equalize the internal pressure within the sealed IGU. Without the presence of these tubes, as the external atmospheric pressure drops at higher elevations, the sealed IGU's internal pressure can surpass the external environment. This can lead to dangerous conditions where the panes may bow outward, producing a pillow-like distortion. Such deformations can compromise the performance and lifespan of the windows.

Averting Seal Failure and Insulation Compromise

Severe pressure imbalances can result in critical failures, such as glass fractures or sealant ruptures. These failures not only create immediate safety hazards but also lead to premature seal failure. Consequently, the insulation properties of the windows become compromised, affecting energy efficiency and indoor comfort. The inclusion of capillary tubes is paramount for ensuring the integrity and durability of window installations in high-altitude locations.

In conclusion, the utilization of capillary tubes is a non-negotiable component in the design of IGUs destined for high-altitude environments. They facilitate the necessary pressure equalization, preventing the risk of structural failure and ensuring that these windows maintain their performance and insulation capabilities over time. For manufacturers in low-elevation areas, embracing this technology is critical to meet the demands and challenges posed by shipping windows to elevated locations.