A-lock Series

The double ferrule tube fitting is a mechanical device used to seal and tighten the conduit material. The mechanical advantages and geometry of the joint make the mechanism a leakproof seal assembly.

Compression fitting assemblies vary in design from manufacturer to manufacturer, but are all made up of the same three basic elements: a compression nut or screw, one or more ferrules, and a compression fitting body. The functioning principle of each component also remains more or less the same between designs: tubing is inserted into the end of the fitting, and the nut/screw is tightened, forcing the ferrule(s) into the fitting body. As the ferrule(s) moves axially into the fitting body, the body’s angled shape radially compresses the end of the ferrule onto the outer diameter of the tubing. It is this radial compression that creates the leak tight seal between the fitting, ferrule, and tubing, and gives the compression fitting its name.

The success of compression fittings in a given application can depend on a number of factors. Chief among these are fitting and ferrule design, tubing selection, and installation procedure. For more details click here