Absolute micro-tightness against the hydrogen medium: this is the predicate given by TÜV Rheinland to the VOSS Lok 40 tube connection system from VOSS Fluid. This is also confirmed by recent certifications by the DVGW (German Association for Gas and Water) and the international shipbuilding classification society DNV-GL. With the TÜV Rheinland certification, VOSS Lok 40 has thus received certificates from the most important national and international certification companies.
The certification in the field of hydrogen was particularly impressive for the VOSS Fluid developers. In addition, hydrogen is considered an extremely sensitive hazardous good due to its high flammability. That is why the demands placed on VOSS Lok 40 are correspondingly high. The purely metal-sealing tube connection system is based on the principle of tube forming established in hydraulics and represents an economical alternative to clamping ring systems due to its extremely high micro-tightness. It reliably seals hydrogen applications up to 70 MPa (700 bar) operating pressure and temperatures from -40°C to +120°C. The TÜV Rheinland inspectors subjected the product to a series of demanding tests in accordance with EC 79. In addition, the tube forming solution meets the tightness requirements of the European regulation ECE R110. It is thus approved for special components used in motor vehicles with CNG drive. The DVGW also tested vibration, tensile strength and pressure pulse strength. Thanks to certification in the hydrogen sector, VOSS Lok 40 is also well-suited for use in alternative drive systems.
The international shipbuilding classification society DNV-GL also carried out a repeat assembly, as well as tests for tightness, vacuum, pull-out test, combined pressure pulsation and vibration. VOSS Lok 40 passed all tests with flying colors and showed maximum leakage reliability and pressure resistance. The certifications apply to the operation of high-pressure and low-pressure tube systems on seagoing vessels.