Hydraulic systems in construction, aerospace, and rail transit often operate at pressures up to 40 MPa. At every connection point, even a microscopic leak can halt an entire machine. Holding the sealing line under extreme pressure and continuous vibration is the central challenge of hydraulic piping design. As a dedicated fluid-connection solution provider, XYOON answers this challenge with a layered approach spanning materials, structure, and process.
A standard ferrule fitting — also called a compression fitting — consists of three core parts: the fitting body, the nut, and the ferrule (cutting ring). When the nut is tightened, the ferrule advances and its sharp edge bites into the tube surface, creating a mechanical grip that prevents blow-out. Traditional metal-to-metal sealing is simple, yet under high pressure and vibration its sealing faces gradually wear and deform.
XYOON's EO-2 functional nut rethinks that weak point. It vulcanizes an oil-resistant rubber seal ring onto a metal locator, placed between the tube OD and the fitting body. This blocks the only leakage path at the joint. The core principle is elastic sealing: sealing force is proportional to fluid pressure — the higher the pressure, the tighter the grip. Working in a static pressure zone, the seal enjoys an exceptionally long service life.
The XYOON double-edge ferrule carries two cutting edges with distinct roles. The first edge anchors the ferrule firmly on the tube; the second adds a safety margin against pull-out. Professional heat treatment yields a hard-outside, soft-inside gradient, combining a keen edge with toughness for a clean bite — complementing the EO-2 nut with a second layer of grip and sealing.
For the most demanding leak-tightness requirements, XYOON Walform technology offers tube-end cold extrusion forming. The system uses only three parts — a 24° cone fitting body, a nut, and a seal ring. Cold extrusion deforms the tube end uniformly, free of pitting and cracks, ensuring stable, reliable sealing. Benefits include high nominal pressure rating, fast assembly, low installation torque, and repeatable disassembly.
Even the best fitting fails without proper pre-assembly. XYOON developed the KC-A01 and KC-A02 ferrule pre-assembly and flaring machines to guarantee consistent, high-quality pre-assembly. Built with imported tool-steel precision dies (sleeve and stop), professionally heat-treated, they deliver repeatable accuracy. A successful pre-assembly shows two signs: the ferrule is "locked" (axially fixed, rotatable circumferentially) and the front material bulge covers at least 80% of the ferrule cross-section.
From the EO-2 functional nut's pressure-boosted elastomeric seal, to the double-edge ferrule's mechanical grip, the Walform ultimate leak-proof design, and the KC-A01 / KC-A02 machines controlling assembly quality upstream, XYOON delivers a multilayer reliability system for road transport, aerospace, shipbuilding, rail transit, and industrial machinery.
