RAPIDOOR closures lock and unlock in seconds, providing positive sealing for virtually all types of tanks, vessels, centrifuges and autoclaves. The system incorporates a safety interlock that prevents unlocking while a vessel is under pressure. Custom-designed to the required size and access style, the closures are available in carbon, clad or stainless steel, nickel, Inconel, and other metals. The system is available in a range of configurations to open from the top, bottom or side using vertical or horizontal slide systems and davit hinge.