EN 856 4SP four-wire steel hydraulic hose is a high-pressure hydraulic transmission hose developed in strict accordance with the European EN 856 international standard. Its core advantages lie in its exclusive structural design and multi-scenario adaptability, serving as a core supporting component in the fields of construction machinery and industrial hydraulics. The nominal pressure of the hose can reach 45MPa (6525PSI), the burst pressure is 4 times the working pressure, and the working temperature range is -40℃ to 100℃, suitable for various hydraulic fluids such as oil-based, water-based and synthetic-based, which can effectively eliminate leakage and burst hazards under high-pressure conditions, balancing stability and durability.
Its structural characteristics are very distinct, adopting a multi-layer composite reinforcement design, with each layer cooperating and protecting each other, fully complying with the requirements of the EN 856 standard. The inner tube is made of a customized oil-resistant nitrile rubber (NBR) formula, which can effectively resist the erosion of hydraulic oil and water-based compounds, prevent aging and damage of the inner rubber, and ensure the tightness of fluid transmission; the middle layer is the core reinforcement structure, using a four-layer high-strength steel wire spiral alternating winding process, which greatly improves the high-pressure resistance and pulse resistance of the hose, and can stably adapt to frequent pressure fluctuations of the hydraulic system; the outer cover is black wear-resistant synthetic rubber, with excellent ozone resistance, aging resistance and mechanical friction resistance, which can adapt to wear and climate impact under complex working conditions and extend the overall service life of the hose.
In terms of operating conditions, the hose has a wide range of applications, focusing on high-pressure hydraulic transmission needs. In the field of construction machinery, it can be used in the hydraulic systems of excavators, cranes, loaders and other equipment, adapting to the complex wear and temperature changes of outdoor construction; in the field of mining equipment, it can withstand dust and mechanical impact in mining operations, and is used for high-pressure hydraulic fluid transmission of mining machinery; in the field of industrial hydraulics, it is suitable for fixed equipment such as metallurgy, machine tools and hydraulic stations to ensure the stable operation of high-pressure hydraulic systems; it can also be applied to agricultural machinery, marine hydraulics and other scenarios. It can be customized in full specifications from 1/4 inch to 2 inches, equipped with full-process technical guidance and after-sales support, with traceable quality, and is the preferred equipment for various high-pressure hydraulic scenarios.
