The quick release unit is fitted as an integral part of the outboard end (B-dimension) of the loading arm. Both valves are clamped together by a collar assembly and the clamp is released by a pneumatic cylinder. A limit switch fitted to the double swing joint, and controlling the rotation angel, activates the cylinder.
The connecting flange sensor and a shear pin, also fitted to the double swing joint, prevent accidental release whilst maneuvering the loading arm.
