The unique design of CEJN’s couplings and nipples makes it possible to connect with some residual pressure without damaging anything in the couplings, also with standard products. This is possible on both couplings and nipples as long as you only have residual pressure on one side. The only limitation to connect is your strength. If your strength is not enough the residual pressure is too high and you need an X64 nipple with pressure eliminator which makes it possible to connect with high residual pressure without excessive force. Residual pressure is something that occurs in more or less all applications where quick connect couplings are used.
One of the biggest benefits you get by choosing CEJN X-series is longer life time, longer endurance in heavy duty applications and a high working pressure. When producing the CEJN nipples they use case hardening of the nipple bodies which gives the highest surface hardness possible. unlike many other brands where the most common hardening method is local hardening (induction), on specific areas on the nipple, which typically has a surface hardness that is 30% lower than the method CEJN use. CEJN's production method is of course a big advantage in the toughest applications but also in more ordinary applications where you will get a longer life time on your quick connect couplings.