Designed to withstand harsh marine conditions, 4 in. dia Marine Break-Away Coupling has max working pressure of 25 bar and disconnects under straight pull force. Standard Break-Away Coupling in 2 or 3 in. aluminum variants have max working pressure of 10 bar. For use with loading arms and hose, 40 bar-rated 2 and 3 in. Collar Release Break-Away Couplings disconnect if loading arms travels past breakage position.