How To Select Hydraulic Hoses

When selecting hydraulic hoses, do you ever wonder how to choose the right one? Proper hose selection not only ensures efficient hydraulic system operation but also extends the system’s service life. So, how exactly should hydraulic hoses be selected? Below, I will analyze key selection criteria from four critical aspects: the hydraulic system’s working pressure, hose inner diameter, temperature requirements, and bending radius.

1. Working Pressure of Hydraulic Hoses

Hydraulic systems often generate instantaneous peak pressure during startup. Therefore, when selecting hoses, it is essential to ensure they have a sufficient safety factor to withstand system pressure and avoid ruptures or damage due to overpressure. Typically, the safety factor for hydraulic hoses should be set at 2.5 to 4 times the system’s maximum pressure. This guarantees stable performance under various operating conditions and provides adequate load-bearing capacity.

2. Selection of Hose Inner Diameter

The inner diameter of a hose directly affects the flow velocity and volume of hydraulic oil, which in turn impacts system efficiency. If the inner diameter is too small, it will cause excessive pressure loss and heat generation, increasing the system’s workload. Conversely, an overly large inner diameter reduces oil flow velocity, slowing the response speed of hydraulic actuators. The inner diameter should be selected based on the system’s flow rate requirements to ensure optimal performance.

3. Temperature Requirements

The operating temperature range of a hydraulic system directly influences hose lifespan. The hose material must withstand the system’s minimum and maximum temperatures. For example:

• Synthetic rubber hoses typically operate within -40℃ to 100℃.

• PTFE (polytetrafluoroethylene) hoses can handle a broader range, from -60℃ to 200℃.

4. Bending Radius and Flexibility

During installation, the hose’s bending radius should exceed the minimum bending radius to avoid internal wear, aging, or reduced fluid transfer efficiency. Excessive bending may restrict oil flow or even cause system failures. When designing hydraulic systems, minimize hose bends to enhance stability and longevity.

The above recommendations from blince Hydraulics cover key factors such as working pressure, inner diameter, temperature, and bending radius. Proper hose selection not only improves system efficiency and reliability but also significantly extends the hydraulic system’s service life. Use these guidelines as a reference during the selection process to ensure optimal performance and durability.