Important Information on Hoses

All liquid or gaseous media flowing through the hose or acting upon it from the outside must be taken into account when selecting a hose. For example, chemicals can have unfavourable effects (swelling, stress cracks, etc.) on the hose materials. Prior testing is therefore important. For ordinary requirements, we advise you to test the hoses under operating conditions. This way, negative effects on hose resistance due to extreme temperatures or chemical mixtures and their concentration are excluded.

All thermoplastic materials are flexible to a certain degree. The hoses can therefore - depending on the design - be used for a wide variety of tasks. Highly flexible hoses are suitable for applications with small bending radii and a high degree of movement. Relatively rigid, thicker hoses are the ideal solution for static applications where movements rarely occur but, for example, high pressures must be withstood.

An important criterion when selecting a hose is the required flow rate that must be supplied to the connected consumer. The size of the hose cross-section, which should be chosen to match the medium and its flow volume, depends on this.

As a rule of thumb: the flow rate of the hose must always be above the flow rate of all consumers in the circuit.

The working pressure can be calculated from the burst pressure, which is determined at room temperature (20°C), by applying a safety factor. The maximum working pressure must take into account all criteria that affect the hose during use. The most important criteria are over-stressing due to bending and stretching and use-related fatigue of the hose, as well as adherence to the tolerances and manufacturing variables of the extruder. The hoses are manufactured from high-quality polymer materials and according to the latest manufacturing standards. To maintain the high-quality standard, all relevant parameters and properties of the hose are checked during and after the manufacturing process.

The working temperature (temperature range) in which a hose is used is also an important factor for hose selection. You should note that the burst pressure and consequently the working pressure drop significantly at increasing or higher temperatures.