Operating pressures

Pressure ratings, permissible operating pressures

The pressures PN are nominal pressures in accordance with DIN 2401. The nominal pressures apply for normal operating conditions (max. 120 °C, constant load) and are specified as tolerable operating pressures with 4-fold safety.The operating pressure must be assumed to be lower while maintaining the safety when:

• the fittings are subject to heavy load
• there are higher temperatures (over 120 °C)
• the fitting is subject to significant pressure surges

The specified permissible load always refers to the fitting. The pressure ratings specified by the tube manufacturer apply for the tubes. The pressure ratings specified by the tube manufacturer apply for the tubes.

Permissible operating pressures

The nominal pressures PN specify the maximum permissible operating pressures including pressure surges. Higher temperatures and mechanical stress result in reduced pressures.

The nominal pressure of the entire system depends on the element with the lowest pressure resistance.

Please Note

The pressures for the different series are available in the following tables:

Any usage beyond the permissible operating temperatures result in accordingly reduced pressure ratings.

The reduction of the pressure ratings depends on the material and the temperature.
The material of the fitting and the seal must be selected according to the operating temperature.

You can find additional infos about pressure loss and drag coefficients on this page.