The double ferrule compression tube fitting consists of four precision-engineered parts designed to provide secure leak proof joints capable of satisfying high pressure, vacuum & vibration application. The four parts are body, front ferrule, back ferrule & nut.
Fittings are supplied complete & ready for use. As the nut is tightened, the front ferrule swages onto the tube as it moves down the cone of the body creating a prominent leak-proof seal on both tube and body by the interface pressure and surface finish of mating components. The super case back ferrule then deforms inwards in the cone of the front ferrule, forming into the tube & creating a strong mechanical hold on the tube.
The internal diameter of the body & nut are closely controlled diameters, which constrain the tube within in a close tolerance of its axis ensuring accurate alignment within the assembled fitting.
The double ferrule compression tube fitting dose not in any way reduces the strength of the tube. Therefore tubes with very thin walls can be used without affecting the safety of your installations. These fittings can also be used on plastics or glass tubes, in latter case PTFE ferrules are used. These ensure perfect tightness without the risk of breakage.