The couplings are characterised by a robust design, increased sealing performance and the particularly effective corrosion protection provided by the zinc-nickel coating. Available in nominal sizes from DN10 to DN25 and for operating pressures up to 350 bar. It is designed for maximum service life even under unfavourable ambient conditions. The burst pressure corresponds to four times the maximum operating pressure. Connector and female body can be coupled under residual pressure up to 20 bar. Mainly used in Scandinavian mechanical engineering.