There are many factors affecting the use of the hose assembly. Only by selecting the correct hose and joints according to the working conditions can the reliability and economy of the hose be ensured. These factors are:
1. Hose size
The inner diameter of the hose should be appropriate. If the pipe diameter is too small, the flow rate of the medium in the pipe will be increased, the system will heat up and the efficiency will be reduced. And it will generate excessive pressure drop, affecting the performance of the entire system. If the hose is fixed with a pipe clamp or the hose passes through a spacer such as a steel plate, pay attention to the outer diameter of the hose.
2. Work pressure
The dynamic working pressure of the hose in the data refers to the maximum pressure allowed when the hose works continuously. According to the safety factor of hydraulic hoses stipulated by relevant international standards, our recommended working pressure is usually a quarter of the minimum burst pressure value of the hose.
3. Impact pressure and fatigue life
The selection of the hose is determined according to the maximum pressure value of the hydraulic system design. Since the pressure value of the hydraulic system is usually dynamic, sometimes there will be a shock pressure, and the peak value of the shock pressure will be much higher than the maximum pressure value of the system. However, there are generally overflow valves on the system, so the impact pressure will not seriously affect the fatigue life of the hose. For hydraulic systems with particularly frequent shock pressures, it is recommended to use hose products that are particularly resistant to pulsation shocks.
4. Temperature range
The user should use the hose within the temperature allowed by the hose quality specification. If the working environment temperature exceeds this range, the life of the hose will be affected, and the pressure it can withstand will also be greatly reduced. For systems where the working environment temperature is too high or too low for a long time, it is recommended to use a hose sheath.
5. Chemical compatibility
If a special hydraulic medium is used, the user should ensure that the inner and outer layers of the hose, the joints and the O-ring seal of the selected hose assembly are compatible with the medium.
6. Bending radius
When installing the hose assembly, attention should be paid to the minimum bending radius of the hose. If the bending radius is too small, the pressure bearing capacity of the hose will be reduced and its service life will be affected.
7. Friction
When the hose is in contact with or rubbed with hard objects as usual, it is recommended to add a spring sheath to the outside of the hose.
