a series of bolts 6 at the base of said yoke attached to the apex of the bonnet 4 is a nut element 10 with an attached valve status indicator disk 8 the valve status indicator disk 8 allows the user to determine if the valve assembly 2 is in an open or closed position within said nut element 10 and said valve status indicator disk 8 is a through passage 14 that allows the operating stem 16 to extend into said bonnet 4 the operating stem 16 ultimately controls the operation of the valve assembly 2 at the exposed portion of the operating stem 16 is a hand wheel 18 which allows the user to open and close the valve through the operating stem 16 in order to utilize the present invention the yoke 12 with attached operating stem 16 and hand wheel 18 is unbolted and removed from the valve assembly 2 referring to fig2 this illustrates an exploded view of the nut element 10 with a valve status indicator disk 8 and a perspective view of the locking device 20 of the current invention hovering over said nut element 10 the locking device 20 u2014 which in a preferred embodiment is composed of a strong sever resistant material such as steel u2014 is comprised of a rectangular elongated lock attachment arm 24 with a hollow base element 26 located at an intermediate point along the arm 24 preferably the hollow base element 10 is positioned in the center of the elongated lock attachment arm 24 creating a t shaped device located at both ends of the rectangular elongated lock attachment arm 24 are apertures 22 for the.