Double Ferrule Tube fittings have been specially designed for use in instrumentation, process and control systems of chemical, petroleum, metallurgical, power generation, pulp and paper plants, where fittings are subjected to vibration, high internal pressure, pressure and temperature cycling.
double ferrule fittings Design
1. The back ferrule dampens the tube circuit vibration through a spring like action. The back ferrule prevents a carry over of tightening torque from the fitting nut to front ferrule.
2. The front ferrule circumferentially seals the surface between the tube and fitting. The inner taper of front ferrule is pressed on the tube so that a pressure tight impression is formed.
3. Silvering of nut threads prevents seizing/galling. This allows repeated use of fittings.
4. A deep body on tube side and taper guarantees accurate positioning and centering of tube.
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