‘Visual Alert’ Key Cabinets pr₽ ≥ovide an effective and infallible m↔↕γanagement control sys∞→αtem against unauthorised ÷✔or inadvertent operation of interlocked€λδ valves or associated process equ✘ λipment by keeping the coded ke₽×ys which initiate the operation of cri✔∏♠tical valves under secure supervisory $♠control.