Views: 0 Author: Site Editor Publish Time: 2025-09-12 Origin: Site
As we as all kown, a vast network of electrical cables was lain In the hidden arteries of the world. But these cables have a critical vulnerability: their connections are prone to failure from moisture, corrosion, and electrical faults. Therefore, this is where heat shrink accessories come in.
What’s more, choosing the right accessory is a precise science, crucial for safety and performance. The selection process is dictated by the cable itself.
The one piece of the puzzle is size. It’s necessary for a heat shrink tube to fit the cable's diameter whatever before or after shrinking.
Heat shrink tubing is defined by its expansion ratio. What the size mean is how much larger its pre-shrunk diameter is compared to its recovered diameter. For example, a 3:1 ratio means a tube that is 3 inches wide can shrink down to a snug fit on a 1-inch diameter cable.
It will useless if the tube's initial diameter is too small to slide over the connector or cable end. However, it will never form a tight seal if the tube's final recovered diameter is larger than the object you're sealing. In addtion, It will due to be loose, not activate the adhesive liner properly, and allow moisture and contaminants to enter in the situation.
Therefore, what you should do is identifying not only the largest diameter you need the tube to slide over (e.g., a large crimp connector) but also the smallest diameter you need it to seal tightly onto (e.g., the cable's insulation itself). Then, choose a tube whose expanded inner diameter is larger than your largest measurement and whose recovered inner diameter is smaller than your smallest measurement. Finally, it will both fit over the connection and shrink down to form a watertight seal on the main cable.
Selection application: It’s important for cable to make surer its size is mattering profoundly. The entire purpose of the accessory is accurating measurement and understanding a product's shrink ratio. These steps for achieving the critical mechanical seal are essential.
