Workshop safety couplings, NW 7.2 (standard)

The couplings of nominal width 7.2 mm are by far the most common coupling types in Germany. The couplings are 07, Festo model series KD4/KS4, IMI-Norgren series 238, Aventics series CP1-NW 7 / 7.8 and many other manufacturers. Safety couplings acc. to ISO 4414 / EN983 differ from the standard coupling in so far as the coupling plug is first vented during decoupling before it is completely decoupled. Thus a possible occurring recoil effect with a standard coupling can be reliably prevented.