Compression Latches
Compression latches involve a two part process that not only fastens two adjacent surfaces together, but also seals the edge formed between them. The latch is first swung into place. Second, the latch compresses a gasket against the frame. Compression latches are used in many different contexts. The ability to seal the frame surrounding the latch makes the compression latch an extremely viable option for electronics, cabinetry, and other environmentally sensitive enclosures. Additionally, the seal helps to reduce vibration in industrial machines such as off-highway equipment and vehicles. Because the compression latch is often employed for their ability to seal edges and are used in outdoor equipment, the materials used to make the latch are often coated for added water resistance.
Panel latches, electronic enclosures, large T latches, lift and turn latches, round latches, trigger latches and tool activated latches are some of the many variations of the compression latch. Each of these latches has in common a lever or knob that is flipped into position to fasten the latch. In more automated compression latches this action causes compression on the gasket. Other variations of the compression latch require a key, knob or lever to be turned to manually compress. Depending on the use, compression latches have the option of a pre-set fixed amount of compression or adjustable compression that allows for more flexibility. Adjustable compression latches can also take up slack as the adjacent seal wears with age. Compression latches are made of die cast zinc or steel components. These components may be coated for appearance or protective purposes. Chrome finish and black powder coat are common top coats for compression latches.