Hydraulic fittings are critical components within hydraulic systems used to connect hoses, valves, pipes, and tubing; they serve two core functions: retention and sealing. Hydraulic fittings ensure that hydraulic fluid does not escape the system while simultaneously directing fluid flow and maintaining system pressure. Since hydraulic systems operate in high-pressure environments, hydraulic fittings must adhere to rigorous design standards, possessing characteristics of durability, reliability, robustness, and corrosion resistance. They are typically manufactured from high-strength metals-such as aluminum, brass, steel, and stainless steel-and the material of the fitting should generally be compatible with that of the components to which it connects.
Essentially, a hydraulic fitting is an accessory that serves a connective function, linking various hydraulic components-including pumps, transmission lines, directional control valves, shut-off valves, hydraulic motors, hydraulic cylinders, and auxiliary devices (such as level gauges, thermometers, and pressure gauges)-to form a complete, closed-loop hydraulic system.
Primary Function
To establish detachable connections-either between two pipelines or between a pipeline and a hydraulic component-within a hydraulic system, thereby forming a closed circuit.
Key Characteristics:
Must be capable of withstanding high pressure (whereas standard fittings typically withstand only about 0.5 MPa, hydraulic fittings can commonly reach 25–64 MPa).
