The Purpose of Hydraulic Fittings: A Comprehensive Guide

Hydraulic fittings are critical connective tissue in fluid power systems, performing important functions that keep industrial machinery alive:

Core Purposes

Pressure-Contained Conduits

Precision engineered threads and sealing ensures a leak-proof pipe that withstands up to 7,000 PSI and prevents pressure loss. Unlike ordinary pipes, they can maintain integrity from pressures of hydraulic shocks.

Connector Functions

As universal translators between incompatible ports, fittings connecting:

Metric to British thread conversions

Tube to hose transitions at valve interfaces

Directional flow changes via 45°/90° elbows

Shock Absorber

Specialized designs like face sealing fittings can absorb mechanical oscillations. Their elastomeric seals compensate for micro-movements that would rupture rigid connections.

Engineering Machinery Applications

Mining Machinery

In the harsh operating environment of mining machinery, the hydraulic system faces severe tests of high pressure, high vibration, high dust and extreme temperature. The high-pressure hydraulic fittings, ferrules and flange clamps for mining machinery ensures stable operation on equipment such as rock drills, excavators and mining trucks with frequent impact loads.

Loaders

Loaders have harsh operating conditions and extremely high requirements for the reliability and durability of hydraulic systems. Hydraulic fittings ensure excellent performance under high pressure and high impact loads. Hydraulic adapters are widely used in the steering system and hydraulic pump circuit of loaders to effectively prevent loosening and leakage.

High-Pressure Hoses

The hydraulic fittings are used to combine with high-pressure hoses to form hose assemblies.

Crimping

Cutting the hose to the specified length as required, put the fitting sleeve on the end of the hose. Then insert the core tube and ensure it inserted to the right depth. Put the assembled hose and fitting into the crimping machine mold, adjust the mold size to the corresponding specification, start the crimping machine to apply radial pressure, plastically deform the sleeve, tightly squeeze the hose and core tube to form a sealed connection.

Threaded connection

Installing a threaded fitting (such as NPT, BSPT) on the end of the hose, tighten it with a nut and the equipment interface. Then seal it with an O-ring or sealant. It is suitable for low-pressure or detachable applications.

Quick-change connection

It adopts a plug-in structure and is quickly connected through a locking mechanism. It is often used in occasions that require frequent disassembly and assembly.

Conclusion:

Hydraulic fittings determine system safety and uptime. From loaders to high pressure hoses, hydraulic fittings transform fluid energy into controlled motion. When specified correctly, they outlast the machinery they serve, proving that in engineering, the smallest links often bear the greatest burdens.