Abstract: An improved declutch mechanism for a manual override for a valve. The declutch mechanism includes a U-shaped declutch layer that is fit with a spring-biased locking bar. The locking bar is biased to engage the housing of the override mechanism to prevent accidental or inadvertent operation of the declutch lever. A single hand may be used to disengage the locking bar from the housing to allow operation of the declutch lever. The declutch mechanism also includes a safety mechanism to prevent the override mechanism from being disengaged when its actuator shaft is not in the default position. The safety mechanism includes a plunger that is movable between a first position in which the plunger prevents the locking bar from being disengaged with the housing, and a second position in which the plunger is received within a keyway in the actuator shaft to allow the locking bar to be disengaged from the housing.

Abstract: A locking bracket for a valve actuator is disclosed in which a bracket element slips over the rotatable input shaft of the actuator and has an arm extending over the surface of the actuator. A locking plate is affixed to the input shaft which may be interconnected to the bracket element. When so interconnected, rotation of the input shaft is prevented by contact between the arm and the surface of the valve actuator. The locking bracket is easily and economically installed due to the lack of any positive physical interconnection between the bracket and the actuator housing.