The component of the illustrated compression fitting, figure "C", used to seal and eliminate leaks between the tubing and the fitting is part __________. See illustration GS-0100.
• Compression fittings use a ferrule (also called an olive or sleeve) to make the seal between the tubing and the fitting body. • The nut provides the mechanical force, but the actual fluid-tight seal is made where metal is squeezed tightly around the tube. • In figure C, note which numbered part is being squeezed between the nut and the fitting body and actually contacts the tubing.
• Look at each numbered part in figure C and ask: which one is directly deformed or squeezed against the tube to stop leaks? • Which part would still touch and grip the tube tightly even after you loosen and remove the nut? • Which parts primarily provide support or threading, rather than making the metal-to-metal seal?
• Identify which numbered part is shaped like a ring or sleeve that can bite into or grip the tubing. • Confirm which part is between the nut and the fitting body, not the threads themselves. • Make sure you are not choosing the nut or the tube, but the small component that is compressed to create the seal.
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