Deviation from the norm
In principle, our articles correspond to the specified standards. However, we reserve the right to deviate from the specified standards in terms of design and dimensions. Dimensions are altered when we see a technical advantage or manufacturing necessity. If exact specifications according to the standard are required, please contact our product management.
For Your Safety
As the pipe connection elements are occasionally subject to heavy loads such as vibration and uncontrolled pressure peaks, only original Schwer components should be used in accordance with the sf assembly instructions. Otherwise the functional safety can be compromised and lead to the loss of the warranty.
Pressure Specifications
The permissible nominal pressures (PN) can be found in the tables on each catalogue page. The pressure is always given in bar and refers to the medium water, statically loaded. Under normal operating conditions (static) and temperatures (20°C), the operating pressure (PB) can be chosen equal to the specified nominal pressure (PN) (see DIN 2401 Part 1). The nominal pressure (PN) is a common, rounded, pressure related key number. Operating pressure (PB): The permissible operating pressure for a component is the highest internal pressure that is permissible for this component based on the material and the calculation bases at the permissible operating temperature with trouble-free operation. At elevated temperatures, the operating pressures (PB) should be reduced compared to the nominal pressure (PN) according to the following pressure reduction table.
Pressure Reduction Table
Temperature range / pressure reduction
-60°C to 20°C / 0,0 %
50°C / 4,5 %
100°C / 11,0 %
150°C / 16,0 %
200°C / 20,0 %
250°C / 24,0 %
300°C / 29,0 %
350°C / 31,0 %
400°C / 33,0 %
Note that DIN 17440 Tab. 6 recommends a maximum temperature of 400° C for 1.4571 stainless steel