Hose assembly - how the selection

Hose assembly usage affect many factors, only in accordance with the conditions and the correct selection of hose fittings, hose used in order to ensure the reliability and economy. These factors include: hose size hose diameter should be appropriate, too small diameter pipeline will increase the flow rate of the medium, the system heat, reduce efficiency, Hydraulic adapters  and will produce excessive pressure drop, affecting the overall system performance, if the hose with tube or hose clamp through the steel plate spacers, they should also pay attention to the outside diameter of the hose. Working pressure of the hose is the dynamic pressure hose to allow for continuous operation at maximum pressure. In accordance with the provisions of the relevant international standards for hydraulic hose safety factor is generally Hydraulic pipe fittings Hydraulic pipe fittings recommended working pressure of the hose is usually a quarter of the minimum burst pressure value impact stress and fatigue longevity hose selection is based on the maximum design pressure of the hydraulic system to determine the value of. As the hydraulic system pressure value is usually dynamic and sometimes impact pressure, impact pressure peak is much higher than the maximum system pressure. However, the system generally have a relief valve, the impact pressure of the hose will not seriously affect the fatigue life. For particularly frequent shock pressure of the hydraulic system, suggested the use of special shock-resistant rubber hose production pulsating temperature range of users should be allowed in the hose quality specifications used within a temperature range of hose. If the working environment temperature exceeds this range, it will affect the life of the hose, which will greatly reduce the ability to withstand pressure. Operating ambient temperature is too high or too low, long-term system, we recommend using the hose jacket. Chemical compatibility when using special hydraulic medium, the user should ensure that the choice of its hose hose assembly, the outer O-ring joints and compatible with medium bending radius bend radius meanings:, R is the hose can be bent but it will not damage or shorten the life of the inner circle of the (minimum) radius. For a hose, R value is certain. If the bend radius is less than when using the R value with the textile reinforcing layer is likely to occur hose kinks. Use a spiral wire hose would be better. Friction hose when used usual contact or friction with hard objects, the proposed increase in the external hose spring jacket.