As of my last update in September 2021, a “4SP Hydraulic Hose” refers to a specific type of high-pressure hydraulic hose designed to meet or exceed the requirements of the 4SP performance standard. Similar to the 4SH hydraulic hose, the 4SP is commonly used in various hydraulic systems to transmit fluid power from one part of the system to another.

1. Construction: The 4SP hydraulic hose typically features a four-layer construction. The layers may include an inner tube, multiple reinforcement layers, and an outer cover. These layers are carefully designed to provide durability, flexibility, and resistance to various operating conditions.
2. Inner Tube: The inner tube is the innermost layer of the hose and comes into direct contact with the hydraulic fluid. It is usually made of synthetic rubber or special materials designed to withstand the specific type of hydraulic fluid used in the system.
3. Reinforcement Layers: The reinforcement layers are responsible for providing the hose with its strength to withstand high-pressure applications. The “4SP” designation indicates that the hose has four high-tensile steel wire spiral braids, making it suitable for heavy-duty applications and offering excellent tensile strength.
4. Cover: The outer cover protects the hose from external damage, such as abrasion, weather, and chemical exposure. It is typically made of synthetic rubber or a combination of synthetic and natural rubber compounds.
5. Temperature Range: 4SP hydraulic hoses are designed to handle a wide temperature range, allowing them to perform efficiently in both high and low-temperature environments.
6. Application: These hoses are commonly used in heavy machinery, construction equipment, mining, agriculture, and industrial applications where high-pressure hydraulic systems are employed. The 4SP hoses are suitable for applications that require high-pressure and high-performance characteristics.
7. Standard Compliance: The “4SP” in the name of the hose refers to its compliance with the 4SP standard, which typically denotes the performance requirements the hose meets or exceeds. Standards may vary depending on the geographical region and industry.