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Seven effective steps to help you select proper hydraulic hose

Hydraulic hoses are designed to carry hydraulic fluids often with high pressure and high temperature. They are very important elements for hydraulic systems. Not all hydraulic hoses are suitable for all purposes. There is a 7 alphabet principle to resolve your problems of hydraulic hose problems.

Seven principles of hose choosing

Hydraulic Hose Selection Principle

  1. Hose size
    Inappropriate hose inside diameter will cause pressure loss and create excessive heat. Dash number refers to sixteenths of an inch standing for the size and coupling and makes the measurement easy to remember.
    Although Hose O.D. will not affect the pressure and heat, it is still an important factor when hose routing is tight.
  2. Temperature
    Fluid temperature and ambient temperature should be considered. Fluid temperatures, whether maximum or minimum, should be kept in a reasonable range. When the fluid is far higher or lower than specified operating temperature, the tube will degrade materially.
    Ambient temperature also concerns about the life of the hose, especially the cover and reinforcement. Once the cover is not workable, reinforcement is exposed to the environments, so the potentiality will be increasing.
  3. Application
    Understand the applications are very helpful the hydraulic hose selection. You can ask yourself or your customer some questions such as where are the hose used?
  4. Media to be carried
    Medias including oils, hydraulic fluids and special chemicals directly contact with the tube. You must be sure that the tube can be compatible with the fluid, or the hose will fail in a short time and cause unnecessary accidents.
  5. Pressure
    Operating pressure should be lower than maximum working pressure and the hose is not suitable for working under maximum pressure for a long time. Surge pressure, which is far higher than normal operating pressure, should be given enough attention to. If the pressure surge is very harmful, spiral wire hydraulic hose may be your premium choice.
  6. Ends of coupling
    Couplings of hydraulic hoses are not interchangeable. Improper coupling also shortens life service period. Consult the manufacturer for suitable coupling.
  7. Delivery
    Once the bore size is determined, consult the chart to determine fluid rate and velocity.

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