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Technical Information: 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:

Series LL L
Outer diameter of tube [mm] 4 6 8 6 8 10 12 15 18 22 28 35 42
Steel [bar] 100 315 - 500 160 - 400
Stainless Steel [bar] 100 315 160
Series S
Outer diameter of tube [mm] 6 8 10 12 14 16 20 25 30 38
Steel [bar] 630 - 800 400 315-400
Stainless Steel [bar] 630 400 250

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phone+49 (0)5541 98770

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