RESISTANCE  TO TEMPERATURE

Aging effects with rubber products are always dependent on temperature. A slightly higher temperature causes the hose to age more quickly.Temperatures above +120В° C can reduce the resistance of textile reinforcements as well as the burst pressure of the hose!
Please see the corresponding catalogue sheet for the valid temperature ranges for the respective Semperit hose.

Semperit offers special hoses for high temperature usage.

 

RESISTANCE TO OIL

The effects of oil and fuel on rubber depend on many factors, which must be observed for the correct selection of materials:
 

• Oil composition (diesel oil, hydraulic oil, ASTM 1-3)
• Temperature and duration of use
• Pressure / low pressure
• Oil resistance of rubber materials is classified according to changes in physical properties that take place in standardized liquids. Swelling in IRM 903 (ASTM oil no. 3) at 100В°C for a test duration of 70 hours is often used as a measurement.

 

If a change in volume of less than 25% is determined, a material is officially classified as having a "very good" resistance to oil.

 

ELECTRICAL PROPERTIES

 

The usual classifications of rubber hoses with regard to electrical properties are as follows:

• Electrical conductivity, with a resistance of < 106 ohm/meter.
• Antistatic properties, with a resistance of 106 bis 109 ohm/meter.
• Insulating properties, with a resistance of > 109 ohm/meter.

The electrical properties of rubber tends to change somewhat with increasing age and wear.
If there are special requirements are needed with regard to the electrical properties of a hose, please specify these when ordering. Our technicians will be happy to help.