Abstract: An apparatus for locking a valve actuating member of a fluid control valve may be used to lock the valve in a closed position. The apparatus is for use with a valve wherein the valve has a valve body and wherein the valve actuating member has a top surface and open and closed positions. The apparatus includes a top portion having a limiting surface for limiting upward movement of the valve actuating member relative to the valve body and gripping means extending from the top portion for gripping the valve body. The gripping means is at a fixed distance from the limiting surface such that the limiting surface is immediately adjacent the top surface of the valve actuating member when the valve actuating member is in the fully closed position and the apparatus is installed.