Basic Model Specifications of Rubber Hose Assembly

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Precautions for use of rubber hose assembly

The rubber hose assembly is usually used as an important part of mechanical equipment. In order to ensure its safety, the following editor will introduce the precautions for its use.

Matters needing attention 1. Working pressure: the maximum pressure that can withstand long-term stable work; the pressure value must be equal to or greater than the maximum pressure of the hydraulic system (pulse pressure or peak pressure of the hydraulic system).

Matters needing attention 2. Test pressure: under 2 times the working pressure, keep the pressure for 60 seconds, no leakage, no drop in pressure value.

Matters needing attention 3. Bursting pressure: generally refers to 4 times the working pressure value.

Matters needing attention 4. Temperature range: generally refers to -40°C to +100°C.

Note 5. The basic model specification of the hose is marked by the inner diameter of the hose, that is, the rounded nominal diameter DN.

Note 6. Hose bending radius: refers to the minimum bending radius that can be selected when working continuously under the maximum pressure. If the bending radius is less than the recommended bending radius, the strength of the hose will be seriously affected. In addition, the minimum linear length of the transition between the hose and the hose coupling connection (Diagram D) shall be greater than 1.5 times the outside diameter of the hose.

Note 7. Arrangement of the hose assembly: Avoid damage to the hose due to stretching, compression, twisting, or friction at sharp angles, and should not be used in a twisted state.

Precautions 8. Storage of hose assembly: Affected by factors such as temperature and light, its validity period is difficult to determine. (The DIN standard stipulates that the hose used in the assembly assembly must be produced within four years, and the service life of the hose assembly shall not exceed 6 years after production, and the storage time shall not exceed 2 years in the 6 years. ISO The standard stipulates that the validity period of the hose and hose assembly shall not exceed 10 years. After the hose is stored, if there are cracks and rust on the surface of the hose, a pressure test should be done before use. Among them, the validity period of the O-ring in the joint Not more than 2 years.)