Technical Changes, Adjustments, Information

We reserve the right to make design and dimension changes as well as price adjustments without prior notice. The product images on the Internet may differ from the delivered items. Weight information is without guarantee. No liability is assumed for errors. For special areas of application, please ask our product management for a suitable solution. Copying of content and the use of images, even in extracts, only with the authorisation of Schwer Fittings GmbH.

Please note the following points:

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 respective permissible nominal pressures (PN) can be found in the tables on each catalog page. Pressure is generally specified in bar and refers to water under static conditions. Under normal operating conditions (static) and at a temperature of 20°C, the operating pressure (PB) may be selected to equal the specified nominal pressure (PN) (see DIN 2401 Part 1).

The nominal pressure (PN) is a commonly used, rounded, pressure-related parameter. Operating pressure (PB): The permissible operating overpressure for a component is the highest internal overpressure, which is permissible for this component based on the material and the calculation principles at the permissible operating temperature during trouble-free operation. At elevated temperatures, the operating pressures (PB) must be reduced relative to the nominal pressure (PN) in accordance with the pressure derations applicable to the base material and the specific application as specified in the relevant standards.

If you have any questions or need assistance regarding the applicable standards and pressure derating factors, our technical support team is happy to assist you at any time.

European pressure equipment directive PED 2014/68/EU

Range A and V (fittings and valves):

All products are developed and manufactured in accordance with Article 4.3 of the European Pressure Equipment Directive PED 2014/68/EU. Products with nominal diameters of more than 25 mm up to and including 32 mm must not be used for pumping liquid or gaseous fluids of group 1 (hazardous) according to the Pressure Equipment Directive PED 2014/68/EU. Products with nominal diameters greater than 32 mm may only be used for pumping group 2 (non-hazardous) liquid fluids according to the Pressure Equipment Directive PED 2014/68/EU. If used with other media, a review by Schwer Fittings should be requested.

ECO range (Ecotube fittings):

All products are developed and manufactured in accordance with Article 4.3 of the European Pressure Equipment Directive PED 2014/68/EU. Products with nominal diameters of more than 25 mm up to and including 32 mm must not be used for pumping Group 1 (hazardous) gases according to the Pressure Equipment Directive PED 2014/68/EU. Products with nominal diameters of more than 32 mm may only be used for pumping group 1 (hazardous) or group 2 (non-hazardous) liquid fluids according to the Pressure Equipment Directive PED 2014/68/EU. If used with other media, a review by Schwer Fittings should be requested.

QC Range (quick connect couplings):

All couplings are designed and manufactured according to Article 4.3 of the European Pressure Equipment Directive PED 2014/68/EU. Couplings with nominal diameters of more than 25 mm up to and including 32 mm must not be used for pumping liquid or gaseous fluids of group 1 (hazardous) according to the Pressure Equipment Directive PED 2014/68/EU. Couplings with nominal diameters of more than 32 mm may only be used for pumping group 2 (non-hazardous) liquid fluids according to the Pressure Equipment Directive PED 2014/68/EU. If used with other media, a review by Schwer Fittings should be requested.

Range Aq (Aquapress Pressfittings ball valves):

All ball valves are designed and manufactured in accordance with Article 4.3 of the European Pressure Equipment Directive PED 2014/68/EU. Ball valves with nominal diameters of more than 25 mm up to and including 60 mm must not be used for pumping group 1 (hazardous) gaseous fluids according to the Pressure Equipment Directive PED 2014/68/EU. Ball valves with nominal diameters of more than 60 mm may only be used for pumping group 1 (hazardous) or group 2 (non-hazardous) liquid fluids according to the Pressure Equipment Directive PED 2014/68/EU. If used with other media, a review by Schwer Fittings should be requested.

Statement from Schwer Fittings

Combining different coupling connections

When combining different coupling connections as well as different connectors and sealing materials within a line system, the lowest operating pressures and the lowest temperature limits apply.

Correct Assembly

For the pressure specifications given, it is assumed that the assembly is carried out properly and correctly. To do this, follow the sf assembly instructions. Likewise, when installing the pipe system, care must be taken to ensure that no additional loads and stresses act on the coupling connections.

Resistance lists for sealing materials and statement PFAS

Resistance lists for the sealing materials mainly used in Schwer Fittings. Overview of the resistance of sealing materials for a wide range of different media (including PFAS materials).

Resistance lists for sealing materials used in Schwer Fittings
Statement from Schwer Fittings on the PFAS issue

Schwer Fittings Standard cleaning

As standard, the u2-Lok twin-ferrule fittings are supplied free of oil and grease (off) and individually packed in foil. A special multi-stage cleaning process with ultrasonic support removes oil and grease residues as well as loose particles, ensuring that the components meet the basic requirements of the industry.

When using oxygen, certain precautions must be taken to rule out the risk of fire. The cleanliness of the system plays an important role in preventing an oxygen fire. For such applications, we offer fittings in accordance with the "offO2" Schwer Fittings standard. This in-house standard defines the cleaning, assembly and packaging of stainless steel fittings in accordance with ASTM G93 Level C for all components in contact with media.

Please refer to our more detailed information on the various cleaning standards in the data sheets listed below.