Position the cover on the cooker body with the arrow on the cover aligned with the arrow on the body handle, press the cover down slightly with one hand, and twist the cover handle (clockwise) to align it directly over the body handle.
Important: The safety valve will activate if steam cannot escape normally. It will also activate if there is not enough water in the pressure cooker and it boils dry, causing the temperature to exceed the normal operating range. The safety valve releases pressure when the fusible alloy melts at the required temperature. The safety valve can be replaced as demonstrated here