Schwer Fittings GmbH has launched its non return valve, manufactured out of stainless steel 1.4571. The non-return valve offers integrated soft sealing in the valve cone. There are non return valves with guts ring connection after German Institute for Standardization 2353 for the tube dimensions of the light series 6L to 42L and for the series 6S to 38S. Schwer also offers non return valves with external thread connection after German Institute for Standardization of ISO 228 in the sizes G 1/8″ to G 1 1/2″. There is also a multiplicity in valve feathers for different opening pressures. Non return valves with one-piece valve housing and internal thread connection after German Institute for standardization of ISO 228 by the thread sizes G 1/8″ to G 2″ and the close system with soft sealing are standard. According to connection variant and sealing material the valves are suitable for many fluid-in the form or gaseous media as well as with raised temperatures. The valve types are also available in special materials on inquiry.